Abraham Klein, Ph.D. - Publications

Affiliations: 
1958-1994 Physics University of Pennsylvania, Philadelphia, PA, United States 
Area:
Particle Physics, Nuclear Physics
Website:
http://www.upenn.edu/almanac/v49/n19/deaths.html

170 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2019 Greenberg WR, Klein A, Zlatev I, Li CT. From Heisenberg matrix mechanics to semiclassical quantization: Theory and first applications. Physical Review. a, Atomic, Molecular, and Optical Physics. 54: 1820-1837. PMID 9913668 DOI: 10.1103/Physreva.54.1820  0.636
2004 Klein A, Protopapas P, Rohoziński S, Starosta K. Kerman-Klein-Dönau-Frauendorf model for odd-odd nuclei: Formal theory Physical Review C. 69. DOI: 10.1103/Physrevc.69.034338  0.427
2002 Klein A, Dreizler RM. Extension of Kohn-Sham theory to excited states by means of an off-diagonal density array Journal of Physics a: Mathematical and General. 35: 2685-2702. DOI: 10.1088/0305-4470/35/11/313  0.397
2001 Klein A. Foundations of self-consistent particle-rotor models and of self-consistent cranking models Physical Review C - Nuclear Physics. 63: 143161-1431616. DOI: 10.1103/Physrevc.63.014316  0.369
2000 Dang GD, Klein A, Walet NR. Self-consistent theory of large-amplitude collective motion: applications to approximate quantization of nonseparable systems and to nuclear physics Physics Reports. 335: 93-274. DOI: 10.1016/S0370-1573(99)00119-2  0.455
1999 Dang GD, Klein A, Reinhard P-. Model of a self-consistent theory of large amplitude collective motion at finite excitation energy Physical Review C. 60: 44306. DOI: 10.1103/Physrevc.60.044306  0.369
1999 Dang GD, Klein A, Reinhard P-. Self-consistent theory of large amplitude collective motion at finite excitation energy Physical Review C. 59: 2065-2081. DOI: 10.1103/Physrevc.59.2065  0.442
1998 Klein A, Dreizler RM. Kohn-Sham Formulation Of Density-Functional Theory Physical Review A. 58: 1581-1584. DOI: 10.1103/Physreva.58.1581  0.313
1998 Klein A, Dreizler RM. Variational principle for the ground-state energy as a functional of the one-particle density matrix: Beyond Hartree-Fock theory Physical Review A. 57: 2485-2495. DOI: 10.1103/Physreva.57.2485  0.366
1997 Protopapas P, Klein A. Application of the Kerman-Klein Method to the Solution of a Spherical Shell Model for a Deformed Rare-Earth Nucleus Physical Review Letters. 78: 4347-4350. DOI: 10.1103/Physrevlett.78.4347  0.361
1997 Protopapas P, Klein A. Derivation and assessment of strong coupling core particle model from the Kerman-Klein-Donau-Frauendorf theory Physical Review C. 55: 699-713. DOI: 10.1103/Physrevc.55.699  0.392
1997 Protopapas P, Klein A. Possible solution of the Coriolis attenuation problem Physical Review C. 55: 1810-1818. DOI: 10.1103/Physrevc.55.1810  0.366
1996 Protopapas P, Klein A, Walet NR. Application of a semimicroscopic core-particle coupling method to the backbending in odd deformed nuclei. Physical Review C: Nuclear Physics. 54: 638-645. PMID 9971387 DOI: 10.1103/Physrevc.54.638  0.333
1996 Protopapas P, Klein A, Walet NR. Further application of a semimicroscopic core-particle coupling method to the properties of 155,157Gd and 159Dy. Physical Review C: Nuclear Physics. 53: 1655-1659. PMID 9971115 DOI: 10.1103/Physrevc.53.1655  0.36
1996 Greenberg WR, Klein A, Li C. Invariant tori and Heisenberg matrix mechanics: a new window on the quantum-classical correspondence Physics Reports. 264: 167-181. DOI: 10.1016/0370-1573(95)00036-4  0.615
1995 Greenberg WR, Klein A, Li C. Invariant Tori and Heisenberg matrix mechanics: A new window on the quantum-classical correspondence. Physical Review Letters. 75: 1244-1247. PMID 10060244 DOI: 10.1103/Physrevlett.75.1244  0.574
1994 Protopapas P, Klein A, Walet NR. Calculation of the properties of the rotational bands of 155,157Gd. Physical Review C: Nuclear Physics. 50: 245-256. PMID 9969654 DOI: 10.1103/Physrevc.50.245  0.345
1994 Klein A, Walet NR. Quantum theory of large amplitude collective motion: Bosonization of all degrees of freedom. Physical Review C: Nuclear Physics. 49: 1439-1448. PMID 9969367 DOI: 10.1103/Physrevc.49.1439  0.434
1994 Klein A, Walet NR. Quantum theory of large amplitude collective motion: Natural fit between the Born-Oppenheimer and Kerman-Klein methods. Physical Review C: Nuclear Physics. 49: 1428-1438. PMID 9969366 DOI: 10.1103/Physrevc.49.1428  0.438
1994 Klein A, Walet NR. Classical mappings of the symplectic model and their application to the theory of large-amplitude collective motion. Physical Review C: Nuclear Physics. 49: 840-851. PMID 9969290 DOI: 10.1103/Physrevc.49.840  0.43
1994 Dang GD, Walet NR, Klein A. Generation of collective subspaces and self-consistent cranking operators Physics Letters B. 322: 11-16. DOI: 10.1016/0370-2693(94)90483-9  0.338
1993 Cebula DP, Klein A, Walet NR. Quantization of the Skyrmion. Physical Review D: Particles and Fields. 47: 2113-2131. PMID 10015797 DOI: 10.1103/Physrevd.47.2113  0.393
1993 Walet NR, Klein A, Dreizler RM. Can e+e- peaks be explained as resonances in Bhabha scattering? Physical Review D: Particles and Fields. 47: 844-852. PMID 10015645 DOI: 10.1103/Physrevd.47.844  0.341
1993 Klein A, Walet NR. Quantum theory of large amplitude collective motion and the Born-Oppenheimer method. Physical Review C: Nuclear Physics. 48: 178-191. PMID 9968809 DOI: 10.1103/Physrevc.48.178  0.422
1993 Klein A, Chen JQ. Approximate seniority-dictated boson-quasifermion mapping and derivation of the interacting boson fermion model. Physical Review C. 47: 612-622. PMID 9968478 DOI: 10.1103/Physrevc.47.612  0.357
1993 Jin-Quan C, Bing-Qing C, Klein A. Factorization of commutators: The Wick theorem for coupled operators Nuclear Physics. 554: 61-76. DOI: 10.1016/0375-9474(93)90357-4  0.315
1992 Walet NR, Klein A, Do Dang G. Quantum corrections to the potential energy for large amplitude collective motion. Physical Review C: Nuclear Physics. 45: 249-260. PMID 9967751 DOI: 10.1103/Physrevc.45.249  0.402
1992 Klein A, Dreizler RM. Alternative derivation of relativistic two-body equations. Physical Review. A. 45: 4340-4345. PMID 9907508 DOI: 10.1103/Physreva.45.4340  0.377
1992 KLEIN A, WALET NR, DANG GD. QUANTUM CORRECTIONS TO THE CRANKING MODEL International Journal of Modern Physics E. 1: 95-130. DOI: 10.1142/S0218301392000059  0.388
1992 Cebula DP, Klein A, Walet NR. Recoil effects in a quantum theory of the skyrmion Journal of Physics G: Nuclear and Particle Physics. 18: 499-520. DOI: 10.1088/0954-3899/18/3/005  0.452
1991 Walet NR, Do Dang G, Klein A. Theory of large-amplitude collective motion applied to the structure of 28Si. Physical Review C: Nuclear Physics. 43: 2254-2267. PMID 9967276 DOI: 10.1103/Physrevc.43.2254  0.32
1991 Klein A, Marshalek ER. Boson realizations of Lie algebras with applications to nuclear physics Reviews of Modern Physics. 63: 375-558. DOI: 10.1103/Revmodphys.63.375  0.431
1991 Klein A, Walet NR, Do Dang G. Ground-state correlations and restoration of broken symmetry to nuclear mean field theory Nuclear Physics, Section A. 535: 1-22. DOI: 10.1016/0375-9474(91)90513-6  0.421
1991 Walet NR, Klein A, Dreizler RM. On the occurrence of particle-antiparticle resonances in scalar QED Physics Letters B. 273: 1-5. DOI: 10.1016/0370-2693(91)90543-Y  0.383
1991 Klein A, Walet NR, Do Dang G. Classical theory of collective motion in the large amplitude, small velocity regime Annals of Physics. 208: 90-148. DOI: 10.1016/0003-4916(91)90343-7  0.382
1990 Walet NR, Klein A, Do Dang G, Bulgac A. Generalized valley approximation applied to a schematic model of the monopole excitation. Physical Review C: Nuclear Physics. 41: 318-328. PMID 9966345 DOI: 10.1103/Physrevc.41.318  0.43
1990 Klein A, Walet NR. Generalization of the quantized Bogoliubov-Valatin transformation and relation to the method of the vector coherent state: The case of U(3) Nuclear Physics, Section A. 515: 207-225. DOI: 10.1016/0375-9474(90)90366-T  0.386
1990 Walet NR, Klein A. Thermal boson expansions and dynamical symmetry Nuclear Physics, Section A. 510: 261-284. DOI: 10.1016/0375-9474(90)90239-I  0.356
1989 Bulgac A, Klein A, Walet NR, Do Dang G. Adiabatic time-dependent Hartree-Fock theory in the generalized valley approximation. Physical Review C: Nuclear Physics. 40: 945-959. PMID 9966059 DOI: 10.1103/Physrevc.40.945  0.443
1989 Klein A, Marshalek ER. On the boson–quasifermion realization of the particle–hole SO(2Ω+1) algebra Journal of Mathematical Physics. 30: 219-232. DOI: 10.1063/1.528573  0.364
1989 Walet NR, Klein A, Dang GD. Reaction paths and generalized valley approximation Journal of Chemical Physics. 91: 2848-2858. DOI: 10.1063/1.456954  0.375
1989 Hahne FJW, Klein A. Generalization of the quantized Bogoliubov-Valatin transformation Physics Letters B. 229: 1-5. DOI: 10.1016/0370-2693(89)90143-3  0.374
1988 Klein A, Une T. Pseudo-Hamiltonian approach to a theory of effective interactions in the particle-hole channel: Microscopic foundations. Physical Review C. 38: 1897-1910. PMID 9955001 DOI: 10.1103/Physrevc.38.1897  0.424
1988 Klein A, Une T. Pseudo-Hamiltonian approach to a theory of effective interactions in the particle-hole channel: Phenomenology Physical Review C. 38: 1886-1896. PMID 9955000 DOI: 10.1103/Physrevc.38.1886  0.414
1988 Bulgac A, Klein A, Do Dang G. Decoupling a collective degree of freedom from a model for tunneling in many-particle systems. Physical Review C: Nuclear Physics. 37: 2156-2161. PMID 9954683 DOI: 10.1103/Physrevc.37.2156  0.396
1988 Bulgac A, Klein A, Do Dang G. Relation between the local harmonic formulation and the generalized valley formulation of the exact decoupling conditions in the adiabatic theory of large amplitude collective motion Nuclear Physics, Section A. 490: 275-286. DOI: 10.1016/0375-9474(88)90506-4  0.401
1987 Bulgac A, Klein A, Do Dang G. Application of a theory of large amplitude collective motion to a generalized landscape model. Physical Review C: Nuclear Physics. 36: 2672-2679. PMID 9954393 DOI: 10.1103/Physrevc.36.2672  0.421
1987 Do Dang G, Bulgac A, Klein A. Determination of the collective Hamiltonian in a self-consistent theory of large amplitude adiabatic motion. Physical Review C: Nuclear Physics. 36: 2661-2671. PMID 9954392 DOI: 10.1103/Physrevc.36.2661  0.365
1987 Klein A, Umar AS. Physical interpretation of time-dependent Hartree-Fock density matrix for heavy ion scattering. Physical Review. C, Nuclear Physics. 35: 1672-1677. PMID 9953955 DOI: 10.1103/Physrevc.35.1672  0.395
1987 Menezes DP, Bonatsos D, Klein A. Extended commutator method for boson mapping in the seniority scheme: Many non-degenerate j-shells Nuclear Physics. 474: 381-396. DOI: 10.1016/0375-9474(87)90623-3  0.335
1987 Bonatsos D, Klein A. Extended commutator method for boson mapping in the seniority scheme: Two non-degenerate-j shells with |j1 − j2| = 2 Nuclear Physics. 469: 253-272. DOI: 10.1016/0375-9474(87)90109-6  0.362
1987 Bulgac A, Klein A, Do Dang G. Uniqueness of the collective submanifold in the adiabatic theory of large amplitude collective motion Physics Letters B. 191: 217-221. DOI: 10.1016/0370-2693(87)90242-5  0.42
1986 Klein A, Umar AS. Physical interpretation and quantization of periodic time-dependent Hartree-Fock solutions. Physical Review. C, Nuclear Physics. 34: 1965-1968. PMID 9953662 DOI: 10.1103/Physrevc.34.1965  0.336
1986 Bonatsos D, Klein A, Zhang Q. Simplified boson mappings of symplectic shell model algebras. Physical Review C. 34: 686-692. PMID 9953502 DOI: 10.1103/Physrevc.34.686  0.359
1986 Umar AS, Klein A. Application of a self-consistent theory of large amplitude collective motion to the generalized meshkov-glick-lipkin model☆ Nuclear Physics. 458: 246-268. DOI: 10.1016/0375-9474(86)90356-8  0.423
1986 Bonatsos D, Klein A, Zhang Q. New form for the Belyaev-Zelevinsky-Marshalek boson realization of shell model algebras SO(2∈i(2ji+1))☆ Physics Letters B. 175: 249-253. DOI: 10.1016/0370-2693(86)90849-X  0.37
1986 Bonatsos D, Klein A. Exact boson mappings for nuclear neutron (proton) shell-model algebras having SU(3) subalgebras Annals of Physics. 169: 61-103. DOI: 10.1016/0003-4916(86)90159-4  0.349
1985 Bonatsos D, Klein A. Exact boson mappings for the nuclear neutron (proton) p shell with the symmetry SO(7) Physical Review C. 31: 992-1006. PMID 9952610 DOI: 10.1103/Physrevc.31.992  0.381
1984 Klein A. Revised generalized density matrix method for the study of nuclear collective motion Physical Review C. 30: 1680-1701. DOI: 10.1103/Physrevc.30.1680  0.46
1984 Klein A, Marumori T, Une T. Formally exact quantum variational principles for collective motion based on the invariance principle of the Schrodinger equation Physical Review C. 29: 240-252. DOI: 10.1103/Physrevc.29.240  0.441
1984 Bonatsos D, Klein A. Generalized phenomenological models of the yrast band Physical Review C. 29: 1879-1886. DOI: 10.1103/Physrevc.29.1879  0.326
1984 Klein A. Equations-of-motion approach to a quantum theory of large-amplitude collective motion Nuclear Physics, Section A. 431: 90-124. DOI: 10.1016/0375-9474(84)90056-3  0.448
1984 Bonatsos D, Klein A, Ching-Teh L. Commutators method for Boson mapping in the seniority scheme Nuclear Physics. 425: 521-547. DOI: 10.1016/0375-9474(84)90022-8  0.359
1984 Klein A, Tanabe K. Variational principles for collective motion: Relation between invariance principle of the Schrödinger equation and the trace variational principle Physics Letters B. 135: 255-257. DOI: 10.1016/0370-2693(84)90385-X  0.39
1984 Bonatsos D, Klein A. Energies of ground-state bands of even nuclei from generalized variable moment of inertia models Atomic Data and Nuclear Data Tables. 30: 27-47. DOI: 10.1016/0092-640X(84)90007-X  0.343
1983 Klein A, Li C. Current Viewpoints concerning the Algebraic Approach to Nuclear Collective Motion Progress of Theoretical Physics Supplement. 74: 237-250. DOI: 10.1143/Ptps.74.237  0.6
1983 Klein A. Equations-of-motion approach to large amplitude collective motion: Coupled bosons Nuclear Physics, Section A. 410: 74-92. DOI: 10.1016/0375-9474(83)90402-5  0.402
1983 Klein A, Ching-Teh Li, Cohen TD, Vallieres M. Phenomenological concepts of nuclear collective motion and their possible microscopic foundations Progress in Particle and Nuclear Physics. 9: 183-231. DOI: 10.1016/0146-6410(83)90018-2  0.585
1983 Klein A. Algebraic methods for a direct calculus of observables in the theory of nuclear band structure Progress in Particle and Nuclear Physics. 10: 39-129. DOI: 10.1016/0146-6410(83)90003-0  0.443
1982 Klein A, Li CT, Vallieres M. Relationship between the bohr-mottelson model and the interacting boson model Physical Review C. 25: 2733-2742. DOI: 10.1103/Physrevc.25.2733  0.593
1982 Klein A, Li CT, Vallieres M. Relationship Between the Interacting Boson Model and the Bohr Collective Hamiltonian Physica Scripta. 25: 452-458. DOI: 10.1088/0031-8949/25/3/003  0.419
1982 Cohen TD, Klein A. Derivation and test of accuracy of an IBM-like hamiltonian for a model with SO(5) × SO(5) symmetry Nuclear Physics A. 390: 1-18. DOI: 10.1016/0375-9474(82)90602-9  0.585
1982 Klein A, Marumori T, Une T. Formally exact quantum variational principles for collective motion based on the invariance principle of the Schrödinger equation Physics Letters B. 109: 237-241. DOI: 10.1016/0370-2693(82)90424-5  0.406
1982 Klein A, Cohen TD, Li C. Boson mappings for schematic nuclear models with the symmetry of SO(5) Annals of Physics. 141: 382-410. DOI: 10.1016/0003-4916(82)90294-9  0.566
1981 Klein A, Li CT. Wentzel-Kramers-Brillouin Quantization of Pseudospin Hamiltonians Physical Review Letters. 46: 895-898. DOI: 10.1103/Physrevlett.46.895  0.378
1981 Klein A, Vallières M. Relationship between the Bohr collective Hamiltonian and the interacting-boson model Physical Review Letters. 46: 586-590. DOI: 10.1103/Physrevlett.46.586  0.384
1981 Klein A, Rafelski H, Rafelski J. IBM hamiltonian, Bohr collective hamiltonian and classical limit for an exactly soluble model with the symmetry of O(5) Nuclear Physics, Section A. 355: 189-206. DOI: 10.1016/0375-9474(81)90137-8  0.576
1981 Klein A, Vallières M. New method for studying the microscopic foundations of the interacting boson model Physics Letters B. 98: 5-10. DOI: 10.1016/0370-2693(81)90354-3  0.335
1980 Klein A, Li CT, Vassanji M. Variational principles for particles and fields in Heisenberg matrix mechanics Journal of Mathematical Physics. 21: 2521-2527. DOI: 10.1063/1.524359  0.425
1980 Klein A. Perspectives in the theory of nuclear collective motion Nuclear Physics. 347: 3-30. DOI: 10.1016/0375-9474(80)90518-7  0.426
1980 Klein A. Examples of the relationship between the shell model and the Bohr collective hamiltonian: The multilevel extension of the Lipkin-Meshkov-Glick model Physics Letters B. 95: 327-330. DOI: 10.1016/0370-2693(80)90162-8  0.351
1980 Klein A. Relation of variable moment of inertia (VMI) concept with the interacting Boson model Physics Letters B. 93: 1-6. DOI: 10.1016/0370-2693(80)90082-9  0.372
1979 Klein A, Vassanji MG. Microscopic description of the nuclear triaxial rotor at high angular momentum near the yrast line Physical Review Letters. 42: 436-439. DOI: 10.1103/Physrevlett.42.436  0.38
1979 Li CT, Klein A. Nonlinear generalization of the quasiparticle random phase approximation for description of anharmonic effects in vibrational spectra: Application to the even Ni isotopes Physical Review C. 19: 2023-2034. DOI: 10.1103/Physrevc.19.2023  0.383
1979 Klein A, Li C. Semiclassical quantization of nonseparable systems Journal of Mathematical Physics. 20: 572-578. DOI: 10.1063/1.524125  0.615
1979 Fulcher LP, Rafelski J, Klein A. The Decay of the Vacuum Scientific American. 241: 150-159. DOI: 10.1038/Scientificamerican1279-150  0.537
1979 Klein A, Li C. Variational principles and Heisenberg matrix mechanics Physica a-Statistical Mechanics and Its Applications. 96: 243-253. DOI: 10.1016/0378-4371(79)90211-5  0.639
1979 Klein A, Vassanji MG. Microscopic derivation of cranking for nuclear systems with large angular momentum Nuclear Physics. 317: 116-134. DOI: 10.1016/0375-9474(79)90454-8  0.416
1978 Klein A, Weldon HA. Equations of Motion, Variational Principles, and WKB Approximations in Quantum Mechanics and Quantum Field Theory: Bound States Physical Review D. 17: 1009-1030. DOI: 10.1103/Physrevd.17.1009  0.384
1978 Vassanji MG, Klein A, Dasso C. Algebraic approach to vibrational collective motion in a model with both collective and noncollective degrees of freedom Physical Review C. 17: 755-765. DOI: 10.1103/Physrevc.17.755  0.339
1978 Klein A, Krejs F. VALIDITY AND SIGNIFICANCE OF TIME DEPENDENT HARTREE APPROXIMATION FOR A ONE-DIMENSIONAL SYSTEM OF BOSONS WITH ATTRACTIVE delta FUNCTION INTERACTIONS Physical Review A. 18: 1343-1352. DOI: 10.1103/Physreva.18.1343  0.403
1978 Klein A. WKB Approximation for Bound States by Heisenberg Matrix Mechanics Journal of Mathematical Physics. 19: 292-297. DOI: 10.1063/1.523503  0.395
1978 Rafelski J, Fulcher LP, Klein A. Fermions and bosons interacting with arbitrarily strong external fields Physics Reports. 38: 227-361. DOI: 10.1016/0370-1573(78)90116-3  0.594
1977 Vassanji MG, Li CT, Klein A, Chattopadhyay PK. An equations-of-motion method for anharmonic vibrations: Application to a degenerate shell model Nuclear Physics. 283: 423-433. DOI: 10.1016/0375-9474(77)90549-8  0.401
1976 Klein A. Bound states and solitons in the Gross-Neveu model Physical Review D. 14: 558-565. DOI: 10.1103/Physrevd.14.558  0.388
1976 Chodos A, Klein A. Quantum corrections to classical confinement Physical Review D. 14: 1663-1666. DOI: 10.1103/Physrevd.14.1663  0.41
1975 Klein A, Krejs F. Lorentz Covariant Quantization of Nonlinear Waves Physical Review D. 12: 3112-3125. DOI: 10.1103/Physrevd.12.3112  0.435
1975 Li C, Klein A, Krejs F. Matrix mechanics as a practical tool in quantum theory: The anharmonic oscillator Physical Review D. 12: 2311-2324. DOI: 10.1103/Physrevd.12.2311  0.6
1975 Klein A, Rafelski J. Comments on "Bose condensation in supercritical external fields" Physical Review D. 12: 1194-1195. DOI: 10.1103/Physrevd.12.1194  0.532
1975 Klein A, Rafelski J. Bose condensation in supercritical external fields Physical Review D. 11: 300-311. DOI: 10.1103/Physrevd.11.300  0.556
1975 Klein A, Lee TH. Nonperturbative three-dimensional formalism for the study of the nucleon-nucleon interaction Physical Review C. 12: 1381-1391. DOI: 10.1103/Physrevc.12.1381  0.343
1975 Chattopadhyay PK, Klein A. Inclusion of Pauli principle constraints in equations of motion methods for the nuclear many-body problem Physical Review C. 11: 610-613. DOI: 10.1103/Physrevc.11.610  0.36
1974 Klein A, Lee TH. Derivation of Relativistic Three-Dimensional Formalisms from the Bethe-Salpeter Equation Physical Review D. 10: 4308-4312. DOI: 10.1103/Physrevd.10.4308  0.336
1974 Rafelski J, Klein A. Possible measurement of the vacuum polarization in heavy-ion scattering Physical Review C. 9: 1756-1759. DOI: 10.1103/Physrevc.9.1756  0.494
1974 Chattopadhyay PK, Klein A, Krejs F. Boson-like expansions without bosons: Application to several exactly soluble shell models with collective features Nuclear Physics. 229: 509-532. DOI: 10.1016/0375-9474(74)90667-8  0.359
1974 Dasso C, Klein A. The Coriolis anti-pairing transition in a simplified shell model with the symmetry of R(5)×R(5) Nuclear Physics. 222: 445-458. DOI: 10.1016/0375-9474(74)90331-5  0.362
1974 Klein A, Rafelski J. On contributions to the pion-nucleus optical potential non-linear in nuclear density: The Ericson-Ericson Lorentz-Lorentz correction Physics Letters B. 49: 318-322. DOI: 10.1016/0370-2693(74)90169-5  0.545
1974 Fulcher L, Klein A. Remarks concerning a model field theory suggested by quantum electrodynamics in a strong electric field Annals of Physics. 84: 335-347. DOI: 10.1016/0003-4916(74)90307-8  0.387
1973 Fulcher L, Klein A. Stability of the Vacuum and Quantization of the Electron-Positron Field for Strong External Fields Physical Review D. 8: 2455-2457. DOI: 10.1103/Physrevd.8.2455  0.34
1973 Dasso C, Klein A. Remarks Concerning the Kerman-Klein Theory of Collective Motion Physical Review C. 8: 2511-2514. DOI: 10.1103/Physrevc.8.2511  0.403
1973 Dreizler RM, Klein A. Concept of transition - Operator boson and its application to an exactly soluble model Physical Review C. 7: 512-521. DOI: 10.1103/Physrevc.7.512  0.389
1973 Vallieres M, Klein A, Dreizler RM. Algebraic approach to the theory of collective motion: Spherical to deformed transition in the single-j shell Physical Review C. 7: 2188-2204. DOI: 10.1103/Physrevc.7.2188  0.36
1973 Krejs F, Klein A. Theory of ground state correlations of closed shell nuclei: A density‐matrix formulation Journal of Mathematical Physics. 14: 1155-1163. DOI: 10.1063/1.1666456  0.41
1973 Dasso C, Klein A. An intrinsic state generating the ground state rotational band of a deformed nucleus and its approximate equivalence to an algebraic-variational treatment: Illustration by an exactly soluble model Nuclear Physics. 210: 443-457. DOI: 10.1016/0375-9474(73)90284-4  0.351
1973 Dasso C, Krejs F, Klein A, Chattopadhyay PK. Validity of an algebraic-variational approach to the theory of collective motion for an exactly soluble shell model with R(5) symmetry Nuclear Physics. 210: 429-442. DOI: 10.1016/0375-9474(73)90283-2  0.425
1973 Dasso C, Klein A, Ching-Yun W, Dreiss GJ. Algebraic method applied to the pairing interaction Nuclear Physics. 205: 200-210. DOI: 10.1016/0375-9474(73)90130-9  0.396
1972 Chattopadhyay PK, Krejs F, Klein A. An exactly soluble shell model with R(5) symmetry exhibiting two-dimensional vibrations and rotations☆ Physics Letters B. 42: 315-318. DOI: 10.1016/0370-2693(72)90496-0  0.344
1972 Vallieres M, Klein A, Dreizler RM. A simplified microscopic model of the Coriolis anti-pairing transition Physics Letters B. 41: 125-129. DOI: 10.1016/0370-2693(72)90442-X  0.304
1971 Dreiss GJ, Dreizler RM, Klein A, Dang GD. Self-consistent theory of nuclear spectra: The pairing-plus-quadrupole interaction model applied to the tin isotopes Physical Review C. 3: 2412-2421. DOI: 10.1103/Physrevc.3.2412  0.336
1971 Li SY, Klein A. Application of the Marumori Boson Expansion to the Problem of Particle-Hole Excitation in Closed-Shell Nuclei Physical Review C. 3: 1871-1876. DOI: 10.1103/Physrevc.3.1871  0.325
1971 Dreizler RM, Klein A, Krejs FR, Dreiss GJ. Ground state correlations as variational parameters in the nuclear many-body problem Nuclear Physics, Section A. 166: 624-642. DOI: 10.1016/0375-9474(71)90910-9  0.415
1971 Das TK, Dreizler RM, Klein A. Theoretical foundation of variable moment of inertia models Physics Letters B. 34: 235-237. DOI: 10.1016/0370-2693(71)90590-9  0.344
1971 Klein A. Formal theory of finite nuclear systems Annals of Physics. 66: 390-404. DOI: 10.1016/0003-4916(71)90196-5  0.417
1969 Dreiss GJ, Klein A. The algebra of currents as a complete dynamical method in the nuclear many-body problem: Application to an exactly soluble model Nuclear Physics. 139: 81-99. DOI: 10.1016/0375-9474(69)90261-9  0.441
1969 Dreizler RM, Klein A. A New Theoretical Method For The Study Of The Phase Transition From Spherical To Deformed Nuclei. Physics Letters B. 30: 236-239. DOI: 10.1016/0370-2693(69)90426-2  0.328
1969 Dreizler RM, Klein A, Dang GD. Growth of multipole moments of low-lying nuclear excited states in the random phase approximation: An extension of Thouless' theorem☆ Physics Letters B. 28: 579-582. DOI: 10.1016/0370-2693(69)90189-0  0.319
1969 Dreiss GJ, Klein A, Pang SC. Variational method without wave functions in the nuclear many-body problem Physics Letters B. 29: 465-467. DOI: 10.1016/0370-2693(69)90023-9  0.33
1968 Do Dang G, Dreizler RM, Klein A, Wu CS. Self-consistent theory of nuclear spectra: Pairing-force model Physical Review. 172: 1022-1031. DOI: 10.1103/Physrev.172.1022  0.31
1968 Klein A, Dreizler M, Johnson RE. Concept Of Ideal Collective Coordinate As The Foundation For A Phenomenological Theory Of Nuclear Collective Motion: Basic Ideas And Relation To Other Phenomenological Methods. Physical Review. 171: 1216-1223. DOI: 10.1103/Physrev.171.1216  0.324
1968 Dang GD, Dreiss GJ, Dreizler RM, Klein A, Wu C. Variational principles for a self-consistent theory of collective motion Nuclear Physics. 114: 501-511. DOI: 10.1016/0375-9474(68)90280-7  0.436
1968 Dang GD, Dreiss GJ, Dreizler RM, Klein A, Wu C. Theory Of Self-Consistent Core-Particle Coupling Models And Its Relation To Phenomenological Models. Nuclear Physics. 114: 481-500. DOI: 10.1016/0375-9474(68)90279-0  0.392
1968 Johnson RE, Klein A, Dreizler RM. Relation between the time-dependent Hartree-Fock method and boson expansion methods in a two-level model Annals of Physics. 49: 496-512. DOI: 10.1016/0003-4916(68)90039-0  0.426
1968 Pang SC, Klein A, Dreizler RM. Study of boson expansion methods in an exactly soluble two-level shell model Annals of Physics. 49: 477-495. DOI: 10.1016/0003-4916(68)90038-9  0.411
1966 Johnson RE, Klein A. Toward a Self-Consistent Theory of the Nuclear Collective Hamiltonian Progress of Theoretical Physics Supplement. 37: 211-233. DOI: 10.1143/Ptps.37.211  0.314
1966 Dang GD, Klein A. Number-Conserving Approximations For The Theory Of The Pairing Interaction In Nuclei. Ii Physical Review. 143: 735-739. DOI: 10.1103/Physrev.147.689  0.425
1966 Celenza LS, Dreizler RM, Klein A, Dreiss GJ. Collective states of positive parity in 16O Physics Letters. 23: 241-244. DOI: 10.1016/0031-9163(66)90170-3  0.316
1966 Dreizler RM, Klein A. Self-consistent theory of bounded rotational spectra: (I). Two-dimensional rotator Nuclear Physics. 75: 321-343. DOI: 10.1016/0029-5582(66)90764-4  0.406
1965 Klein A, Celenza L, Kerman AK. Collective motion in finite many-particle systems. III. Foundations of a theory of rotational spectra of deformed nuclei Physical Review. 140: B245-B263. DOI: 10.1103/Physrev.140.B245  0.351
1964 Klein A, Lee BW. Does Spontaneous Breakdown of Symmetry Imply Zero-Mass Particles? Physical Review Letters. 12: 266-268. DOI: 10.1103/Physrevlett.12.266  0.576
1964 Dang GD, Klein A. Theory Of The Anharmonicity In The Vibrational Motion Of Even-Even Spherical Nuclei Physical Review. 133. DOI: 10.1103/Physrev.133.B257  0.35
1964 Huang K, Klein A. Phonons in liquid helium Annals of Physics. 30: 203-234. DOI: 10.1016/0003-4916(64)90116-2  0.365
1963 Kerman AK, Klein A. Generalized Hartree-Fock approximation for the calculation of collective states of a finite many-particle system Physical Review. 132: 1326-1342. DOI: 10.1103/Physrev.132.1326  0.416
1963 Dang GD, Klein A. Higher Random-Phase Approximations And The Theory Of The Electron Gas Physical Review. 130: 2572-2579. DOI: 10.1103/Physrev.130.2572  0.338
1962 Kerman AK, Klein A. The Description Of Rotating Nuclei Physics Letters. 1: 185-187. DOI: 10.1016/0031-9163(62)90345-1  0.311
1962 Klein A. Theory of fermion systems with attractive interactions: exact solution of the bcs reduced hamiltonian Il Nuovo Cimento Series 10. 24: 788-813. DOI: 10.1007/Bf02751454  0.385
1961 Iizuka J, Klein A. Dispersion Relations for Virtual Pion-Nucleon Scattering Progress of Theoretical Physics. 25: 1017-1027. DOI: 10.1143/Ptp.25.1017  0.308
1961 Klein A. Perturbation theory for an infinite medium of fermions. III. Derivation of the landau theory of fermi liquids Physical Review. 121: 957-961. DOI: 10.1103/Physrev.121.957  0.419
1959 Tzoar N, Raphael R, Klein A. Meson-theoretical origin of the spin-orbit coupling between two nucleons Physical Review Letters. 2: 433-434. DOI: 10.1103/Physrevlett.2.433  0.323
1959 Klein A. Many-particle approach to the one-electron problem in insulators and semiconductors Physical Review. 115: 1136-1146. DOI: 10.1103/Physrev.115.1136  0.395
1959 Klein A, Zemach C. Analytic properties of the amplitude for the scattering of a particle by a central potential Annals of Physics. 7: 440-455. DOI: 10.1016/0003-4916(59)90053-3  0.338
1959 Lee BW, Klein A. Application of the Chew-Low formalism of multi-channel reactions Il Nuovo Cimento. 13: 891-908. DOI: 10.1007/Bf02724817  0.362
1958 Klein A. On the Concept of Potential in Quantum Field Theory Progress of Theoretical Physics. 20: 257-266. DOI: 10.1143/Ptp.20.257  0.361
1958 Klein A, Prange R. Perturbation Theory For An Infinite Medium Of Fermions Physical Review. 112: 950-956. DOI: 10.1103/Physrev.112.994  0.349
1958 Prange R, Klein A. A Generalized Reaction Matrix Approach To The Theory Of The Infinite Medium Of Fermions Physical Review. 112: 1008-1020. DOI: 10.1103/Physrev.112.1008  0.415
1958 Norton R, Klein A. Significance Of The Redundant Solutions Of The Low-Wick Equation Physical Review. 109: 991-995. DOI: 10.1103/Physrev.109.991  0.645
1958 Norton RE, Klein A. Complete set of dispersion relations for a class of fixed-source meson theories Physical Review. 109: 584-600. DOI: 10.1103/Physrev.109.584  0.668
1957 Klein A, Zemach C. Many-Body Problem In Quantum Field Theory Physical Review. 108: 126-138. DOI: 10.1103/Physrev.108.126  0.421
1956 Klein A, McCormick BH. Construction of the Adiabatic Nuclear Potential: Formalism Physical Review. 104: 1747-1757. DOI: 10.1103/Physrev.104.1747  0.309
1956 Klein A. Dispersion relations for fixed-source meson theories: Effective-range relations Physical Review. 104: 1136-1141. DOI: 10.1103/Physrev.104.1136  0.31
1956 Klein A. Dispersion relations for fixed-source meson theories Physical Review. 104: 1131-1136. DOI: 10.1103/Physrev.104.1131  0.385
1956 Klein A. Derivation of low scattering formalism Physical Review. 102: 913-914. DOI: 10.1103/Physrev.102.913  0.318
1955 Klein A. Scattering Matrix in the Heisenberg Representation for a System with Bound States Progress of Theoretical Physics. 14: 580-588. DOI: 10.1143/Ptp.14.580  0.349
1955 Bernstein J, Klein A. Electromagnetic Properties of the Deuteron. I. Charge Density and Quadrupole Moment Physical Review. 99: 966-973. DOI: 10.1103/Physrev.99.966  0.73
1955 Klein A, McCormick BH. Meson Pair Theory Physical Review. 98: 1428-1445. DOI: 10.1103/Physrev.98.1428  0.328
1954 Klein A. New Tamm-Dancoff formalism Physical Review. 95: 1676-1682. DOI: 10.1103/Physrev.95.1676  0.388
1954 Klein A. Suppression of pair coupling in nuclear forces Physical Review. 95: 1061-1064. DOI: 10.1103/Physrev.95.1061  0.338
1954 Klein A. Configuration space methods for the construction of potentials Physical Review. 94: 195-201. DOI: 10.1103/Physrev.94.195  0.39
1954 Klein A. Single-time formalisms from covariant equations Physical Review. 94: 1052-1056. DOI: 10.1103/Physrev.94.1052  0.331
1953 Klein A. The construction of potentials in quantum field theory [12] Physical Review. 91: 1285. DOI: 10.1103/Physrev.91.1285  0.347
1951 Karplus R, Klein A, Schwinger J. Electrodynamic displacement of atomic energy levels [23] Physical Review. 84: 597-598. DOI: 10.1103/Physrev.84.597  0.498
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