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Volume 88, Issue 16

22 April 2002
On the Cover

Numerical simulation of electron density in amorphous silicon showing the migration of a hydrogen atom (blue) from atom A to atom B (1-5). The last panel plots the distance from the hydrogen atom to the nearest silicon atom as a function of time.

From the article:

Diffusion Mechanism of Hydrogen in Amorphous Silicon: Ab Initio Molecular Dynamics Simulation
Y.-S. Su and S. T. Pantelides
Phys. Rev. Lett. 88, 165503 (2002)

LETTERS

General Physics

Two-Species Mixture of Quantum Degenerate Bose and Fermi Gases
Z. Hadzibabic, C. A. Stan, K. Dieckmann, S. Gupta, M. W. Zwierlein, A. Görlitz, and W. Ketterle
Phys. Rev. Lett. 88, 160401 (2002) – Published 4 April 2002
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Bose-Enhanced Chemistry: Amplification of Selectivity in the Dissociation of Molecular Bose-Einstein Condensates
M. G. Moore and A. Vardi
Phys. Rev. Lett. 88, 160402 (2002) – Published 9 April 2002
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Kinetics and Scaling in Ballistic Annihilation
Emmanuel Trizac
Phys. Rev. Lett. 88, 160601 (2002) – Published 8 April 2002
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Gravitation and Astrophysics

Neutrino Cross Sections and Future Observations of Ultrahigh-Energy Cosmic Rays
Alexander Kusenko and Thomas J. Weiler
Phys. Rev. Lett. 88, 161101 (2002) – Published 4 April 2002
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Observability of Earth-Skimming Ultrahigh Energy Neutrinos
Jonathan L. Feng, Peter Fisher, Frank Wilczek, and Terri M. Yu
Phys. Rev. Lett. 88, 161102 (2002) – Published 4 April 2002
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Noncommutative Quantum Cosmology
H. García-Compeán, O. Obregón, and C. Ramírez
Phys. Rev. Lett. 88, 161301 (2002) – Published 4 April 2002
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Dimming Supernovae without Cosmic Acceleration
Csaba Csáki, Nemanja Kaloper, and John Terning
Phys. Rev. Lett. 88, 161302 (2002) – Published 9 April 2002
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Elementary Particles and Fields

A High Statistics Measurement of the Λc+ Lifetime
J. M. Link et al. (FOCUS Collaboration)
Phys. Rev. Lett. 88, 161801 (2002) – Published 8 April 2002
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ϒ Production and Polarization in pp¯ Collisions at s=1.8TeV
D. Acosta et al. (CDF Collaboration)
Phys. Rev. Lett. 88, 161802 (2002) – Published 9 April 2002
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Measurement of the Lifetime Difference in D0 Meson Decays
K. Abe et al. (Belle Collaboration)
Phys. Rev. Lett. 88, 162001 (2002) – Published 8 April 2002
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Nuclear Physics

Neutron Polarizabilities Investigated by Quasifree Compton Scattering from the Deuteron
K. Kossert, M. Camen, F. Wissmann, J. Ahrens, J. R. M. Annand, H.-J Arends, R. Beck, G. Caselotti, P. Grabmayr, O. Jahn, P. Jennewein, M. I. Levchuk, A. I. L'vov, J. C. McGeorge, A. Natter, V. Olmos de León, V. A. Petrun'kin, G. Rosner, M. Schumacher, B. Seitz, F. Smend, A. Thomas, W. Weihofen, and F. Zapadtka
Phys. Rev. Lett. 88, 162301 (2002) – Published 8 April 2002
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Atomic, Molecular, and Optical Physics

Spinor Bosonic Atoms in Optical Lattices: Symmetry Breaking and Fractionalization
Eugene Demler and Fei Zhou
Phys. Rev. Lett. 88, 163001 (2002) – Published 3 April 2002
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Feedback on the Motion of a Single Atom in an Optical Cavity
T. Fischer, P. Maunz, P. W. H. Pinkse, T. Puppe, and G. Rempe
Phys. Rev. Lett. 88, 163002 (2002) – Published 4 April 2002
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Helium-Antihydrogen Interaction: The Born-Oppenheimer Potential Energy Curve
Krzysztof Strasburger and Henryk Chojnacki
Phys. Rev. Lett. 88, 163201 (2002) – Published 8 April 2002
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Enhancement of Positron-Atom Annihilation near the Positronium Formation Threshold
G. F. Gribakin and J. Ludlow
Phys. Rev. Lett. 88, 163202 (2002) – Published 5 April 2002
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Nonlinear Dynamics, Fluid Dynamics, Classical Optics, etc.

Focal Spots of Size λ/23 Open Up Far-Field Florescence Microscopy at 33 nm Axial Resolution
Marcus Dyba and Stefan W. Hell
Phys. Rev. Lett. 88, 163901 (2002) – Published 4 April 2002
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Patterning of Small Particles by a Surfactant-Enhanced Marangoni-Bénard Instability
Van X. Nguyen and Kathleen J. Stebe
Phys. Rev. Lett. 88, 164501 (2002) – Published 3 April 2002
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Plasma and Beam Physics

Storing, Retrieving, and Processing Optical Information by Raman Backscattering in Plasmas
I. Y. Dodin and N. J. Fisch
Phys. Rev. Lett. 88, 165001 (2002) – Published 9 April 2002
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Condensed Matter: Structure, etc.

Coulomb Explosion and Thermal Spikes
E. M. Bringa and R. E. Johnson
Phys. Rev. Lett. 88, 165501 (2002) – Published 4 April 2002
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Raman Spectroscopic Investigation of H2, HD, and D2 Physisorption on Ropes of Single-Walled, Carbon Nanotubes
Keith A. Williams, Bhabendra K. Pradhan, Peter C. Eklund, Milen K. Kostov, and Milton W. Cole
Phys. Rev. Lett. 88, 165502 (2002) – Published 4 April 2002
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Diffusion Mechanism of Hydrogen in Amorphous Silicon: Ab Initio Molecular Dynamics Simulation
Y.-S. Su and S. T. Pantelides
Phys. Rev. Lett. 88, 165503 (2002) – Published 8 April 2002
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Surface Segregation of Ge at SiGe(001) by Concerted Exchange Pathways
P. Bogusławski and J. Bernholc
Phys. Rev. Lett. 88, 166101 (2002) – Published 5 April 2002
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Condensed Matter: Electronic Properties, etc.

Total Energy Method from Many-Body Formulation
F. Aryasetiawan, T. Miyake, and K. Terakura
Phys. Rev. Lett. 88, 166401 (2002) – Published 2 April 2002
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Nonadiabatic Car-Parrinello Molecular Dynamics
Nikos L. Doltsinis and Dominik Marx
Phys. Rev. Lett. 88, 166402 (2002) – Published 3 April 2002
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Spin-Resolved Unoccupied Electronic Band Structure from Quantum Size Oscillations in the Reflectivity of Slow Electrons from Ultrathin Ferromagnetic Crystals
R. Zdyb and E. Bauer
Phys. Rev. Lett. 88, 166403 (2002) – Published 3 April 2002
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Mediation of Long Range Charge Transfer by Kondo Bound States
R. G. Endres, D. L. Cox, R. R. P. Singh, and S. K. Pati
Phys. Rev. Lett. 88, 166601 (2002) – Published 4 April 2002
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Broken Unitarity and Phase Measurements in Aharonov-Bohm Interferometers
O. Entin-Wohlman, A. Aharony, Y. Imry, Y. Levinson, and A. Schiller
Phys. Rev. Lett. 88, 166801 (2002) – Published 4 April 2002
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Energy Loss of Atoms at Metal Surfaces due to Electron-Hole Pair Excitations: First-Principles Theory of “Chemicurrents”
J. R. Trail, M. C. Graham, D. M. Bird, M. Persson, and S. Holloway
Phys. Rev. Lett. 88, 166802 (2002) – Published 8 April 2002
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Two-Dimensional Metal in a Parallel Magnetic Field
Xuan P. A. Gao, Allen P. Mills, Jr., Arthur P. Ramirez, Loren N. Pfeiffer, and Kenneth W. West
Phys. Rev. Lett. 88, 166803 (2002) – Published 9 April 2002
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Dynamics of Quantum Phase Transition in an Array of Josephson Junctions
J. Dziarmaga, A. Smerzi, W. H. Zurek, and A. R. Bishop
Phys. Rev. Lett. 88, 167001 (2002) – Published 2 April 2002
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Anomalous Dispersion of Longitudinal Optical Phonons in Nd1.86Ce0.14CuO4+δ Determined by Inelastic X-Ray Scattering
M. d'Astuto, P. K. Mang, P. Giura, A. Shukla, P. Ghigna, A. Mirone, M. Braden, M. Greven, M. Krisch, and F. Sette
Phys. Rev. Lett. 88, 167002 (2002) – Published 3 April 2002
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Intrinsic Behavior of Flux Lines in Pure Niobium near the Upper Critical Field
E. M. Forgan, S. J. Levett, P. G. Kealey, R. Cubitt, C. D. Dewhurst, and D. Fort
Phys. Rev. Lett. 88, 167003 (2002) – Published 4 April 2002
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Temperature and Field Dependence of the Anisotropy of MgB2
M. Angst, R. Puzniak, A. Wisniewski, J. Jun, S. M. Kazakov, J. Karpinski, J. Roos, and H. Keller
Phys. Rev. Lett. 88, 167004 (2002) – Published 4 April 2002
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Magnetoresistance of Untwinned YBa2Cu3Oy Single Crystals in a Wide Range of Doping: Anomalous Hole-Doping Dependence of the Coherence Length
Yoichi Ando and Kouji Segawa
Phys. Rev. Lett. 88, 167005 (2002) – Published 8 April 2002
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Quasiparticle Liquid in the Highly Overdoped Bi2Sr2CaCu2O8+δ
Z. M. Yusof, B. O. Wells, T. Valla, A. V. Fedorov, P. D. Johnson, Q. Li, C. Kendziora, Sha Jian, and D. G. Hinks
Phys. Rev. Lett. 88, 167006 (2002) – Published 8 April 2002
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Kink Pairs Unbinding on Domain Walls and the Sequence of Phase Transitions in Fully Frustrated XY Models
S. E. Korshunov
Phys. Rev. Lett. 88, 167007 (2002) – Published 9 April 2002
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Competition between Charge- and Spin-Density-Wave Order and Superconductivity in La1.875Ba0.125−xSrxCuO4
M. Fujita, H. Goka, K. Yamada, and M. Matsuda
Phys. Rev. Lett. 88, 167008 (2002) – Published 9 April 2002
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Observation of Magnetic Level Repulsion in Fe6:Li Molecular Antiferromagnetic Rings
M. Affronte, A. Cornia, A. Lascialfari, F. Borsa, D. Gatteschi, J. Hinderer, M. Horvatić, A. G. M. Jansen, and M.-H. Julien
Phys. Rev. Lett. 88, 167201 (2002) – Published 3 April 2002
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Strongly Enhanced Magnetic Moments of Vanadium Impurities in Thin Films of Sodium and Potassium
Funing Song and Gerd Bergmann
Phys. Rev. Lett. 88, 167202 (2002) – Published 3 April 2002
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Spinons in a Crossed-Chains Model of a 2D Spin Liquid
Oleg A. Starykh, Rajiv R. P. Singh, and Gregory C. Levine
Phys. Rev. Lett. 88, 167203 (2002) – Published 4 April 2002
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Charge Ordering Fluctuation and Optical Pseudogap in La1−xCaxMnO3
K. H. Kim, S. Lee, T. W. Noh, and S.-W. Cheong
Phys. Rev. Lett. 88, 167204 (2002) – Published 8 April 2002
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Finite Temperature Magnetism in Gd: Evidence against a Stoner Behavior
K. Maiti, M. C. Malagoli, A. Dallmeyer, and C. Carbone
Phys. Rev. Lett. 88, 167205 (2002) – Published 5 April 2002
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T3/2 Dependence of the Interlayer Exchange Coupling in Ferromagnetic Multilayers
J. Lindner, C. Rüdt, E. Kosubek, P. Poulopoulos, K. Baberschke, P. Blomquist, R. Wäppling, and D. L. Mills
Phys. Rev. Lett. 88, 167206 (2002) – Published 8 April 2002
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Macroscopic Magnetization Jumps due to Independent Magnons in Frustrated Quantum Spin Lattices
J. Schulenburg, A. Honecker, J. Schnack, J. Richter, and H.-J. Schmidt
Phys. Rev. Lett. 88, 167207 (2002) – Published 8 April 2002
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Finite-Temperature Phase Diagram of Hard-Core Bosons in Two Dimensions
Guido Schmid, Synge Todo, Matthias Troyer, and Ansgar Dorneich
Phys. Rev. Lett. 88, 167208 (2002) – Published 9 April 2002
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Anomalous Quantum-Confined Stark Effects in Stacked InAs/GaAs Self-Assembled Quantum Dots
Weidong Sheng and Jean-Pierre Leburton
Phys. Rev. Lett. 88, 167401 (2002) – Published 9 April 2002
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Interdisciplinary Physics: Biological Physics, Quantum Information, etc.

Local Realistic Model for the Dynamics of Bulk-Ensemble NMR Information Processing
N. C. Menicucci and Carlton M. Caves
Phys. Rev. Lett. 88, 167901 (2002) – Published 4 April 2002
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Quantum Key Distribution with Bright Entangled Beams
Ch. Silberhorn, N. Korolkova, and G. Leuchs
Phys. Rev. Lett. 88, 167902 (2002) – Published 8 April 2002
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Catalysis in Nonlocal Quantum Operations
G. Vidal and J. I. Cirac
Phys. Rev. Lett. 88, 167903 (2002) – Published 9 April 2002
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Specific and Nonspecific Collapse in Protein Folding Funnels
Jorge Chahine, Hugh Nymeyer, Vitor B. P. Leite, Nicholas D. Socci, and José Nelson Onuchic
Phys. Rev. Lett. 88, 168101 (2002) – Published 5 April 2002
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Viscosity of Two-Dimensional Suspensions
Junqi Ding, Heidi E. Warriner, and Joseph A. Zasadzinski
Phys. Rev. Lett. 88, 168102 (2002) – Published 8 April 2002
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Rectified Motion of Colloids in Asymmetrically Structured Channels
C. Marquet, A. Buguin, L. Talini, and P. Silberzan
Phys. Rev. Lett. 88, 168301 (2002) – Published 8 April 2002
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COMMENTS

Comment on “Nonclassical Smoothening of Nanoscale Surface Corrugations”
Navot Israeli and Daniel Kandel
Phys. Rev. Lett. 88, 169601 (2002) – Published 5 April 2002
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Erlebacher et al. Reply:
Jonah Erlebacher, Michael J. Aziz, Eric Chason, Michael B. Sinclair, and Jerrold A. Floro
Phys. Rev. Lett. 88, 169602 (2002) – Published 5 April 2002
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