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Physical Review A PERIODICALS PHYSICAL REVIEW A Postmaster send address changes to: For editorial and subscription correspondence, American Institute of Physics please see inside front cover 500 Sunnyside Boulevard „ISSN: 1050-2947… Woodbury, NY 11797-2999 THIRD SERIES, VOLUME 57, NUMBER 3 CONTENTS MARCH 1998 RAPID COMMUNICATIONS Fundamental concepts From Feynman histories to observables ............................................................. R1469 D. Sokolovski Microscopic analogs of the Greenberger-Horne-Zeilinger experiment ..................................... R1473 Seth Lloyd Quantum information Optical simulation of quantum logic ............................................................... R1477 N. J. Cerf, C. Adami, and P. G. Kwiat Atomic and molecular structure and dynamics Finite-size scaling approach for the Schro¨dinger equation .............................................. R1481 Pablo Serra, Juan Pablo Neirotti, and Sabre Kais Atomic and molecular collisions and interactions Angle-resolved two-dimensional mapping of electron emission following Cl 2p excitations in the HCl molecule ...................................................................................... R1485 E. Kukk, A. Wills, N. Berrah, B. Langer, J. D. Bozek, O. Nayadin, M. Alsherhi, A. Farhat, and D. Cubaynes Double photoionization of helium from threshold to high energies ....................................... R1489 Yanghui Qiu, Jian-Zhi Tang, Joachim Burgdo¨rfer, and Jianyi Wang Atomic and molecular processes in external fields Threshold photodetachment of Al2: Electron affinity and fine structure ................................... R1493 Michael Scheer, Rene´ C. Bilodeau, Jan Tho”gersen, and Harold K. Haugen Elastic and inelastic collisions of 6Li atoms in magnetic and optical traps ................................. R1497 M. Houbiers, H. T. C. Stoof, W. I. McAlexander, and R. G. Hulet Direct observation of atomic localization in optical superlattices ......................................... R1501 L. Guidoni and P. Verkerk Matter waves Multiply connected Bose-Einstein-condensed alkali-metal gases: Current-carrying states and their decay ....... R1505 Erich J. Mueller, Paul M. Goldbart, and Yuli Lyanda-Geller (Continued) CONTENTS - Continued PHYSICAL REVIEW A THIRD SERIES, VOLUME 57, NUMBER 3 MARCH 1998 ARTICLES Fundamental concepts Continuous and pulsed observations in the quantum Zeno effect ......................................... 1509 L. S. Schulman Dispersion relation for the ground-state energy of a two-electron atom ................................... 1516 I. A. Ivanov and J. Dubau Position-momentum entropic uncertainty relation and complementarity in single-slit and double-slit experiments ................................................................................... 1519 Jorge Sa´nchez-Ruiz Wigner phase-space distribution function for the hydrogen atom ......................................... 1526 S. Nouri Interference in hyperbolic space ................................................................... 1529 S. Chaturvedi, G. J. Milburn, and Zhongxi Zhang Uniform semiclassical expansions for the direct part of Franck-Condon transitions .......................... 1536 Bruno Hu¨pper and Bruno Eckhardt Fourth-order self-energy contribution to the Lamb shift ................................................ 1548 S. Mallampalli and J. Sapirstein Quantum stochastic motion in complex space ........................................................ 1565 M. S. Wang Consistency, amplitudes, and probabilities in quantum theory ........................................... 1572 Ariel Caticha Strict bounds on the Franson inequality ............................................................. 1583 Lev Vaidman and Ori Belkind Renormalization-group method for simple operator problems in quantum mechanics ........................ 1586 I. L. Egusquiza and M. A. Valle Basagoiti Radiative level shifts of an accelerated hydrogen atom and the Unruh effect in quantum electrodynamics ....... 1590 R. Passante Limits of the measurability of the local quantum electromagnetic-field amplitude ........................... 1595 G. Compagno and F. Persico Choice of consistent family, and quantum incompatibility .............................................. 1604 Robert B. Griffiths Quantum information Entanglement measures and purification procedures ................................................... 1619 V. Vedral and M. B. Plenio Using a quantum computer to investigate quantum chaos .............................................. 1634 Ru¨diger Schack Atomic and molecular structure and dynamics Resonant formation of ddm mesomolecules at low D2 gas density ....................................... 1636 Yu. V. Petrov, V. V. Kuzminov, V. Yu. Petrov, W. H. Breunlich, M. Cargnelli, J. Marton, and J. Zmeskal Valence and excited states of LiH2 ................................................................ 1646 Gennady L. Gutsev, Marcel Nooijen, and Rodney J. Bartlett Energies and oscillator strengths for lithiumlike ions .................................................. 1652 Zong-Chao Yan, M. Tambasco, and G. W. F. Drake Hyperfine structure of antiprotonic helium energy levels ............................................... 1662 D. Bakalov and V. I. Korobov (Continued) CONTENTS - Continued PHYSICAL REVIEW A THIRD SERIES, VOLUME 57, NUMBER 3 MARCH 1998 Two-stage Rydberg charge exchange: An efficient method for production of antihydrogen ................... 1668 E. A. Hessels, D. M. Homan, and M. J. Cavagnero Kohn-Sham equations for multiplets ............................................................... 1672 A´ . Nagy Stability and positron annihilation of positronium hydride L50,1,2 states: A quantum Monte Carlo study ....... 1678 Dario Bressanini, Massimo Mella, and Gabriele Morosi Evolution of the Cu Ka3,4 satellites from threshold to saturation ........................................ 1686 M. Fritsch, C. C. Kao, K. Ha¨ma¨la¨inen, O. Gang, E. Fo¨rster, and M. Deutsch Laser spectroscopic studies of state-dependent collisional quenching of the lifetimes of metastable antiprotonic helium atoms .................................................................................. 1698 M. Hori, H. A. Torii, R. S. Hayano, T. Ishikawa, F. E. Maas, H. Tamura, B. Ketzer, F. J. Hartmann, R. Pohl, C. Maierl, T. von Egidy, M. Kumakura, N. Morita, I. Sugai, D. Horva´th, E. Widmann, J. Eades, and T. Yamazaki Muon transfer from excited states of hydrogen and deuterium to nitrogen, neon, and argon ................... 1713 Y.-A. Thalmann, R. Jacot-Guillarmod, F. Mulhauser, L. A. Schaller, L. Schellenberg, H. Schneuwly, S. Tresch, and A. Werthmu¨ller Benchmark calculations for lanthanide atoms: Calibration of ab initio and density-functional methods .......... 1721 Wenjian Liu and Michael Dolg Kohn-Sham potentials and exchange and correlation energy densities from one- and two-electron density matrices for Li2,N2, and F2 ............................................................................. 1729 P. R. T. Schipper, O. V. Gritsenko, and E. J. Baerends Electron affinities, magnetic dipole decay rates, and hyperfine structure for the excited states of 5p3 Sn2 ....... 1743 Steven M. O’Malley and Donald R. Beck Radiative transition processes between initial and final channels ......................................... 1747 Cheng Zhu, Jian-Guo Wang, Yi-Zhi Qu, and Jia-Ming Li Some two-electron properties of sodium ............................................................ 1753 Charlotte Froese Fischer, Per Jo¨nsson, and Michel Godefroid Electron-pair relative-motion densities of atoms in position and momentum spaces .......................... 1759 Hisashi Matsuyama, Toshikatsu Koga, E. Romera, and Jesus S. Dehesa Hydrogen molecule in a magnetic field: The lowest states of the P manifold and the global ground state of the parallel configuration ............................................................................ 1767 T. Detmer, P. Schmelcher, and L. S. Cederbaum Atomic and molecular collisions and interactions 3 3 3 Cross-section measurement for the energy pooling collisions: Cd(5p P1)1Cd(5p P1) Cd(5d DJ) 1 → 1Cd(5s S0) .................................................................................. 1778 S. Barsotti, F. Fuso, A. F. Molisch, and M. Allegrini Polarization of Lyman-a radiation from atomic hydrogen excited by electron impact from near threshold to 1800 eV ...................................................................................... 1787 G. K. James, J. A. Slevin, D. Dziczek, J. W. McConkey, and Igor Bray Elastic collisions of low- to intermediate-energy electrons from carbon dioxide: Experimental and theoretical differential cross sections ........................................................................ 1798 H. Tanaka, T. Ishikawa, T. Masai, T. Sagara, L. Boesten, M. Takekawa, Y. Itikawa, and M. Kimura Illustration of the role of saddle-point and molecular-type ionization mechanisms in atomic collisions .......... 1809 Clara Illescas, I. Rabada´n, and A. Riera Long-range diagonal adiabatic corrections for the ground molecular state of alkali-metal dimers ............... 1821 M. Marinescu and A. Dalgarno Observation of exchange-scattering effects in cadmium (e,2e) energy spectra .............................. 1827 N. L. S. Martin, R. P. Bauman, and M. Wilson CONTENTS - Continued PHYSICAL REVIEW A THIRD SERIES, VOLUME 57, NUMBER 3 MARCH 1998 Measurements of the electron-impact differential cross sections and generalized oscillator strengths for excitation of the
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