Volume 74, Issue 5

30 January 1995

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LETTERS

General Physics

Quantum Backreaction on "Classical" Variables

Arlen Anderson

Phys. Rev. Lett. 74, 621 (1995) - Published 30 January, 1995

Ab Initio Molecular Dynamics of Metallic Hydrogen at High Densities

Jorge Kohanoff and Jean-Pierre Hansen

Phys. Rev. Lett. 74, 626 (1995) - Published 30 January, 1995

Gravitation and Astrophysics

Dynamics of Apparent and Event Horizons

Peter Anninos, David Bernstein, Steven Brandt, Joseph Libson, Joan Massó, Edward Seidel, Larry Smarr, Wai-Mo Suen, and Paul Walker

Phys. Rev. Lett. 74, 630 (1995) - Published 30 January, 1995

Resonant Photon-Graviton Conversion and Cosmic Microwave Background Fluctuations

Pisin Chen

Phys. Rev. Lett. 74, 634 (1995) - Published 30 January, 1995

Elementary Particles and Fields

Nonperturbative Consistency of $d = 2$ String Theory

Joseph Polchinski

Phys. Rev. Lett. 74, 638 (1995) - Published 30 January, 1995

Nuclear Physics

Absence of M3 Quenching in $^{26}$ Mg

Kamal K. Seth, R. Soundranayagam, A. Saha, C. W. de Jager, H. de Vries, B. A. Brown, and B. H. Wildenthal

Phys. Rev. Lett. 74, 642 (1995) - Published 30 January, 1995

Two-Body Photodisintegration of the Deuteron up to 2.8 GeV

J. E. Belz et al.

Phys. Rev. Lett. 74, 646 (1995) - Published 30 January, 1995

Deuteron Form Factor

Glennys R. Farrar, Khadra Huleihel, and Huayi Zhang

Phys. Rev. Lett. 74, 650 (1995) - Published 30 January, 1995

Transverse-Longitudinal Asymmetry in the Quasielastic ${}^{3}{\vec{He}} (\vec{e}, e^{'})$ Reaction

J. -O. Hansen et al.

Phys. Rev. Lett. 74, 654 (1995) - Published 30 January, 1995

Atomic, Molecular, and Optical Physics

Circular Rydberg States of the Hydrogen Atom in a Magnetic Field

Timothy C. Germann, Dudley R. Herschbach, Martin Dunn, and Deborah K. Watson

Phys. Rev. Lett. 74, 658 (1995) - Published 30 January, 1995

Classical Self-Ionization of Fast Atomic Ions in Magnetic Fields

P. Schmelcher and L. S. Cederbaum

Phys. Rev. Lett. 74, 662 (1995) - Published 30 January, 1995

Measurement of Dispersive Properties of Electromagnetically Induced Transparency in Rubidium Atoms

Min Xiao, Yong-qing Li, Shao-zheng Jin, and Julio Gea-Banacloche

Phys. Rev. Lett. 74, 666 (1995) - Published 30 January, 1995

Spatial Consequences of Electromagnetically Induced Transparency: Observation of Electromagnetically Induced Focusing

Richard R. Moseley, Sara Shepherd, David J. Fulton, Bruce D. Sinclair, and Malcolm H. Dunn

Phys. Rev. Lett. 74, 670 (1995) - Published 30 January, 1995

Time-resolved Femtosecond Photon Echo Probes Bimodal Solvent Dynamics

Maxim S. Pshenichnikov, Koos Duppen, and Douwe A. Wiersma

Phys. Rev. Lett. 74, 674 (1995) - Published 30 January, 1995

How Large Photon Recoil Can Make Cold Atoms Lase

K. M. Gheri, H. Ritsch, D. F. Walls, and V. I. Balykin

Phys. Rev. Lett. 74, 678 (1995) - Published 30 January, 1995

Nonlinear Dynamics: Fluid Dynamics, Classical Optics, Etc.

Complex Classical Trajectories and Chaotic Tunneling

Akira Shudo and Kensuke S. Ikeda

Phys. Rev. Lett. 74, 682 (1995) - Published 30 January, 1995

Dynamical Localization near Quantum Antiresonance: Exact Results and a Solvable Case

I. Dana, E. Eisenberg, and N. Shnerb

Phys. Rev. Lett. 74, 686 (1995) - Published 30 January, 1995

Secondary Instabilities and Spatiotemporal Chaos in Parametric Surface Waves

Wenbin Zhang and Jorge Viñals

Phys. Rev. Lett. 74, 690 (1995) - Published 30 January, 1995

Correlation of Occupation Profiles in Invasion Percolation

C. Du, B. Xu, Y. C. Yortsos, M. Chaouche, N. Rakotomalala, and D. Salin

Phys. Rev. Lett. 74, 694 (1995) - Published 30 January, 1995

Plasma and Beam Physics

Nonlinear Saturation of Toroidal Alfvén Eigenmodes

F. Zonca, F. Romanelli, G. Vlad, and C. Kar

Phys. Rev. Lett. 74, 698 (1995) - Published 30 January, 1995

Helicities of Electron Magnetohydrodynamic Currents and Fields in Plasmas

R. L. Stenzel, J. M. Urrutia, and C. L. Rousculp

Phys. Rev. Lett. 74, 702 (1995) - Published 30 January, 1995

Nonlinear Instability Mechanism in 3D Collisional Drift-Wave Turbulence

D. Biskamp and A. Zeiler

Phys. Rev. Lett. 74, 706 (1995) - Published 30 January, 1995

Two-Dimensional Regimes of Self-Focusing, Wake Field Generation, and Induced Focusing of a Short Intense Laser Pulse in an Underdense Plasma

S. V. Bulanov, F. Pegoraro, and A. M. Pukhov

Phys. Rev. Lett. 74, 710 (1995) - Published 30 January, 1995

Staged $Z$ Pinch

H. U. Rahman, F. J. Wessel, and N. Rostoker

Phys. Rev. Lett. 74, 714 (1995) - Published 30 January, 1995

High Beta and Enhanced Confinement in a Second Stable Core VH-Mode Advanced Tokamak

A. D. Turnbull, T. S. Taylor, Y. R. Lin-Liu, and H. St. John

Phys. Rev. Lett. 74, 718 (1995) - Published 30 January, 1995

Condensed Matter: Structure, Etc.

X-Ray Study of the Correlations in the Thermal Fluctuations of Free-Standing Smectic- $A$ Films

J. D. Shindler, E. A. L. Mol, A. Shalaginov, and W. H. de Jeu

Phys. Rev. Lett. 74, 722 (1995) - Published 30 January, 1995

Structure and Ionic Conduction in ${(AgI)}_{x} {(AgP O_{3})}_{1 - x}$ Glasses

J. D. Wicks, L. Börjesson, G. Bushnell-Wye, W. S. Howells, and R. L. McGreevy

Phys. Rev. Lett. 74, 726 (1995) - Published 30 January, 1995

Crossover Scaling Functions in One Dimensional Dynamic Growth Models

John Neergaard and Marcel den Nijs

Phys. Rev. Lett. 74, 730 (1995) - Published 30 January, 1995

Observation of the Sliding Mode in Incommensurate Intergrowth Compounds: Brillouin Scattering from the Inclusion Compound of Urea and Heptadecane

Detlef Schmicker, Sander van Smaalen, Jan L. de Boer, Cor Haas, and Kenneth D. M. Harris

Phys. Rev. Lett. 74, 734 (1995) - Published 30 January, 1995

Emission of Submillimeter Electromagnetic Waves by Coherent Phonons

T. Dekorsy, H. Auer, C. Waschke, H. J. Bakker, H. G. Roskos, H. Kurz, V. Wagner, and P. Grosse

Phys. Rev. Lett. 74, 738 (1995) - Published 30 January, 1995

Self-Organized Criticality in Nonconserved Systems

A. Alan Middleton and Chao Tang

Phys. Rev. Lett. 74, 742 (1995) - Published 30 January, 1995

Free Boundary Conditions at Austenite-Martensite Interfaces

O. P. Bruno, P. H. Leo, and F. Reitich

Phys. Rev. Lett. 74, 746 (1995) - Published 30 January, 1995

Vortex Mutual Friction in Rotating Superfluid ${}^{3}{He}$ - $B$

T. D. C. Bevan, A. J. Manninen, J. B. Cook, A. J. Armstrong, J. R. Hook, and H. E. Hall

Phys. Rev. Lett. 74, 750 (1995) - Published 30 January, 1995

Strain Relaxation in Hexagonally Close-Packed Metal-Metal Interfaces

C. Günther, J. Vrijmoeth, R. Q. Hwang, and R. J. Behm

Phys. Rev. Lett. 74, 754 (1995) - Published 30 January, 1995

Evidence for a $C_{60}$ Monolayer Intercalated between a Graphite Monolayer and Iridium

E. V. Rut'kov, A. Ya. Tontegode, and M. M. Usufov

Phys. Rev. Lett. 74, 758 (1995) - Published 30 January, 1995

Electron Spin Resonance Investigations of the Molecular Motion of N $O_{2}$ on ${Al}_{2}$ $O_{3}$ (111) under Ultrahigh Vacuum Conditions

H. Schlienz, M. Beckendorf, U. J. Katter, T. Risse, and H. -J. Freund

Phys. Rev. Lett. 74, 761 (1995) - Published 30 January, 1995

Structural Instability of Ferromagnetic fcc Fe Films on Cu(100)

S. Müller, P. Bayer, C. Reischl, K. Heinz, B. Feldmann, H. Zillgen, and M. Wuttig

Phys. Rev. Lett. 74, 765 (1995) - Published 30 January, 1995

Condensed Matter: Electronic Properties, Etc.

Direct-to-Indirect Crossover in Semiconductor Alloys: A First-Order Phase Transition?

Belita Koiller and R. B. Capaz

Phys. Rev. Lett. 74, 769 (1995) - Published 30 January, 1995

Drude Metallic Response of Polypyrrole

R. S. Kohlman, J. Joo, Y. Z. Wang, J. P. Pouget, H. Kaneko, T. Ishiguro, and A. J. Epstein

Phys. Rev. Lett. 74, 773 (1995) - Published 30 January, 1995

Electron Emission Due to Exciton Breakup from Negative Electron Affinity Diamond

C. Bandis and B. B. Pate

Phys. Rev. Lett. 74, 777 (1995) - Published 30 January, 1995

Dynamical Transition in the Wigner Solid on a Liquid Helium Surface

Keiya Shirahama and Kimitoshi Kono

Phys. Rev. Lett. 74, 781 (1995) - Published 30 January, 1995

Exchange Effects in an Artificial Atom at High Magnetic Fields

O. Klein, C. de C. Chamon, D. Tang, D. M. Abusch-Magder, U. Meirav, X. -G. Wen, M. A. Kastner, and S. J. Wind

Phys. Rev. Lett. 74, 785 (1995) - Published 30 January, 1995

$η$ Pairing as a Mechanism of Superconductivity in Models of Strongly Correlated Electrons

Jan de Boer, Vladimir E. Korepin, and Andreas Schadschneider

Phys. Rev. Lett. 74, 789 (1995) - Published 30 January, 1995

Quasiparticle and Spin Excitation Spectra in the Normal and $d$ -Wave Superconducting State of the Two-Dimensional Hubbard Model

T. Dahm and L. Tewordt

Phys. Rev. Lett. 74, 793 (1995) - Published 30 January, 1995

Evidence for $d_{x^{2} - y^{2}}$ Pairing from the Magnetic Field Modulation of Y ${Ba}_{2}$ ${Cu}_{3}$ $O_{7}$ -Pb Josephson Junctions

D. A. Wollman, D. J. Van Harlingen, J. Giapintzakis, and D. M. Ginsberg

Phys. Rev. Lett. 74, 797 (1995) - Published 30 January, 1995

Low Frequency Magneto-optical Properties of Josephson-Coupled Superconductors

L. N. Bulaevskii, M. P. Maley, and M. Tachiki

Phys. Rev. Lett. 74, 801 (1995) - Published 30 January, 1995

Fluctuation Effects on a Strongly Pinned Vortex Lattice in a Thin Type-II Superconducting Wire

X. S. Ling, J. D. McCambridge, N. D. Rizzo, J. W. Sleight, D. E. Prober, L. R. Motowidlo, and B. A. Zeitlin

Phys. Rev. Lett. 74, 805 (1995) - Published 30 January, 1995

Bethe or Bethe-like Lattice Calculations Are More Reliable Than Conventional Mean-Field Calculations

P. D. Gujrati

Phys. Rev. Lett. 74, 809 (1995) - Published 30 January, 1995

Violation of Self-Duality for Topological Solitons due to Soliton-Soliton Interaction on a Cylindrical Geometry

R. Dandoloff, S. Villain-Guillot, A. Saxena, and A. R. Bishop

Phys. Rev. Lett. 74, 813 (1995) - Published 30 January, 1995

Low-Lying Eigenstates of the One-Dimensional Heisenberg Ferromagnet for any Magnetization and Momentum

Bill Sutherland

Phys. Rev. Lett. 74, 816 (1995) - Published 30 January, 1995

Polarization Energy Distribution of a Positive Ion in Liquid Argon

A. K. Al-Omari, R. Reininger, and D. L. Huber

Phys. Rev. Lett. 74, 820 (1995) - Published 30 January, 1995

Cross-Disciplinary Physics

Effects of Microscopic Disorder in a Simple Model for Polymerization through Heterogeneous Catalysis

David Dab, Olivier Tribel, Gregoire Nicolis, and Michel Promel

Phys. Rev. Lett. 74, 824 (1995) - Published 30 January, 1995

COMMENTS

Comment on "Relation between Persistent Currents and the Scattering Matrix"

Alain Comtet, Alexander Moroz, and Stéphane Ouvry

Phys. Rev. Lett. 74, 828 (1995) - Published 30 January, 1995

ERRATA

Strong-Segregation Theory of Bicontinuous Phases in Block Copolymers

Peter D. Olmsted and Scott T. Milner

Phys. Rev. Lett. 74, 829 (1995) - Published 30 January, 1995