Volume 77, Issue 27

30 December 1996

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LETTERS

General Physics

Bose-Einstein Condensates in Time Dependent Traps

Y. Castin and R. Dum

Phys. Rev. Lett. 77, 5315 (1996) - Published 30 December, 1996

Low Energy Excitations of a Bose-Einstein Condensate: A Time-Dependent Variational Analysis

Víctor M. Pérez-García, H. Michinel, J. I. Cirac, M. Lewenstein, and P. Zoller

Phys. Rev. Lett. 77, 5320 (1996) - Published 30 December, 1996

Path Integral Solution of the Kramers Problem

A. N. Drozdov and M. Morillo

Phys. Rev. Lett. 77, 5324 (1996) - Published 30 December, 1996

Kramers Rate for Thermal Plus Dichotomous Noise Applied to Ratchets

P. Reimann and T. C. Elston

Phys. Rev. Lett. 77, 5328 (1996) - Published 30 December, 1996

Observation of Light Confinement Effects with a Near-Field Optical Microscope

Jean-Claude Weeber, Eric Bourillot, Alain Dereux, Jean-Pierre Goudonnet, Yong Chen, and Christian Girard

Phys. Rev. Lett. 77, 5332 (1996) - Published 30 December, 1996

Elementary Particles and Fields

Measurement of Dijet Angular Distributions by the Collider Detector at Fermilab

F. Abe et al. (CDF Collaboration)

Phys. Rev. Lett. 77, 5336 (1996) - Published 30 December, 1996

Nuclear Physics

Precise Determination of the Pion-Nuclear Coupling Parameter from Weak Processes in $^{3}$ He

Nimai C. Mukhopadhyay and K. Junker

Phys. Rev. Lett. 77, 5342 (1996) - Published 30 December, 1996

Atomic, Molecular, and Optical Physics

$P, T$ -Odd Spin-Rotational Hamiltonian for YbF Molecule

A. V. Titov, N. S. Mosyagin, and V. F. Ezhov

Phys. Rev. Lett. 77, 5346 (1996) - Published 30 December, 1996

Element 118: The First Rare Gas with an Electron Affinity

Ephraim Eliav, Uzi Kaldor, Yasuyuki Ishikawa, and Pekka Pyykkö

Phys. Rev. Lett. 77, 5350 (1996) - Published 30 December, 1996

Observation of Lifetime-Limited X-Ray Linewidths in Cold Highly Charged Ions

P. Beiersdorfer, A. L. Osterheld, V. Decaux, and K. Widmann

Phys. Rev. Lett. 77, 5353 (1996) - Published 30 December, 1996

Electromagnetically Induced Transparency in an Ideal Plasma

S. E. Harris

Phys. Rev. Lett. 77, 5357 (1996) - Published 30 December, 1996

Nonlinear Dynamics, Fluid Dynamics, Classical Optics, Etc.

Transitions to Bubbling of Chaotic Systems

Shankar C. Venkataramani, Brian R. Hunt, Edward Ott, Daniel J. Gauthier, and Joshua C. Bienfang

Phys. Rev. Lett. 77, 5361 (1996) - Published 30 December, 1996

Light Induced Single Molecule Frequency Shift

Taras Plakhotnik, Daniel Walser, Alois Renn, and Urs P. Wild

Phys. Rev. Lett. 77, 5365 (1996) - Published 30 December, 1996

Developed Turbulence: From Full Simulations to Full Mode Reductions

Siegfried Grossmann, Detlef Lohse, and Achim Reeh

Phys. Rev. Lett. 77, 5369 (1996) - Published 30 December, 1996

Self-Excitation of Fluctuations of Inertial Particle Concentration in Turbulent Fluid Flow

Tov Elperin, Nathan Kleeorin, and Igor Rogachevskii

Phys. Rev. Lett. 77, 5373 (1996) - Published 30 December, 1996

Plasma and Beam Physics

Temporal Evolution of Self-Modulated Laser Wakefields Measured by Coherent Thomson Scattering

A. Ting, K. Krushelnick, C. I. Moore, H. R. Burris, E. Esarey, J. Krall, and P. Sprangle

Phys. Rev. Lett. 77, 5377 (1996) - Published 30 December, 1996

Temporal Characterization of a Self-Modulated Laser Wakefield

S. P. Le Blanc, M. C. Downer, R. Wagner, S.-Y. Chen, A. Maksimchuk, G. Mourou, and D. Umstadter

Phys. Rev. Lett. 77, 5381 (1996) - Published 30 December, 1996

Condensed Matter: Structure, Etc.

Dynamics of Random Hydrophobic-Hydrophilic Copolymers with Implications for Protein Folding

D. Thirumalai, V. Ashwin, and J. K. Bhattacharjee

Phys. Rev. Lett. 77, 5385 (1996) - Published 30 December, 1996

Straightening of Thermal Fluctuations in Semiflexible Polymers by Applied Tension

Udo Seifert, Wolfgang Wintz, and Philip Nelson

Phys. Rev. Lett. 77, 5389 (1996) - Published 30 December, 1996

Scaling Relations for the Lengths and Widths of Fractures

T. Walmann, A. Malthe-Sørenssen, J. Feder, T. Jøssang, P. Meakin, and H. H. Hardy

Phys. Rev. Lett. 77, 5393 (1996) - Published 30 December, 1996

Phonon Poiseuille Flow in Quasi-One-Dimensional Single Crystals

A. Smontara, J. C. Lasjaunias, and R. Maynard

Phys. Rev. Lett. 77, 5397 (1996) - Published 30 December, 1996

Rotons and Roton Wave Packets in Superfluid $^{4} He$

D. E. Galli, E. Cecchetti, and L. Reatto

Phys. Rev. Lett. 77, 5401 (1996) - Published 30 December, 1996

Condensed Matter: Electronic Properties, Etc.

Band-Gap Engineering by III-V Infill in Sodalite

A. Trave, F. Buda, and A. Fasolino

Phys. Rev. Lett. 77, 5405 (1996) - Published 30 December, 1996

Isolated Hydrogen Molecules in GaAs

J. Vetterhöffer, J. Wagner, and J. Weber

Phys. Rev. Lett. 77, 5409 (1996) - Published 30 December, 1996

Carrier-Controlled Doping Efficiency in ${{La}_{2} CuO}_{4 + δ}$

Z. G. Li, H. H. Feng, Z. Y. Yang, A. Hamed, S. T. Ting, P. H. Hor, S. Bhavaraju, J. F. DiCarlo, and A. J. Jacobson

Phys. Rev. Lett. 77, 5413 (1996) - Published 30 December, 1996

Insulator-to-Metal Crossover in the Normal State of ${La}_{2 - x} {Sr}_{x} {CuO}_{4}$ Near Optimum Doping

G. S. Boebinger, Yoichi Ando, A. Passner, T. Kimura, M. Okuya, J. Shimoyama, K. Kishio, K. Tamasaku, N. Ichikawa, and S. Uchida

Phys. Rev. Lett. 77, 5417 (1996) - Published 30 December, 1996

Muon Spin Relaxation Studies of Zn-Substitution Effects in High- $T_{c}$ Cuprate Superconductors

B. Nachumi, A. Keren, K. Kojima, M. Larkin, G. M. Luke, J. Merrin, O. Tchernyshöv, Y. J. Uemura, N. Ichikawa, M. Goto, and S. Uchida

Phys. Rev. Lett. 77, 5421 (1996) - Published 30 December, 1996

Magnetic Dynamics in Underdoped ${YBa}_{2} {Cu}_{3} O_{7 - x}$ : Direct Observation of a Superconducting Gap

P. Dai, M. Yethiraj, H. A. Mook, T. B. Lindemer, and F. Doğan

Phys. Rev. Lett. 77, 5425 (1996) - Published 30 December, 1996

Ultrafast Electron Redistribution through Coulomb Scattering in Undoped GaAs: Experiment and Theory

F. X. Camescasse, A. Alexandrou, D. Hulin, L. Bányai, D. B. Tran Thoai, and H. Haug

Phys. Rev. Lett. 77, 5429 (1996) - Published 30 December, 1996

Cross-Disciplinary Physics

Chain Length Scaling of Protein Folding Time

A. M. Gutin, V. I. Abkevich, and E. I. Shakhnovich

Phys. Rev. Lett. 77, 5433 (1996) - Published 30 December, 1996

Photon Correlation Spectroscopy of Colloidal Palladium Using a Coherent X-Ray Beam

T. Thurn-Albrecht, W. Steffen, A. Patkowski, G. Meier, E. W. Fischer, G. Grübel, and D. L. Abernathy

Phys. Rev. Lett. 77, 5437 (1996) - Published 30 December, 1996

COMMENTS

Comment on “Stability of a Solitary Pulse against Wave Packet Disturbances in an Active Medium”

Jonas Lundbek Hansen and Tomas Bohr

Phys. Rev. Lett. 77, 5441 (1996) - Published 30 December, 1996

ERRATA

Statistical-Mechanical Foundation of the Ubiquity of the Lévy Distributions in Nature

Constantino Tsallis, Silvio V. F. Levy, André M. C. Souza, and Roger Maynard

Phys. Rev. Lett. 77, 5442 (1996) - Published 30 December, 1996

Ab Initio Photoabsorption Spectra and Structures of Small Semiconductor and Metal Clusters

Angel Rubio, J. A. Alonso, X. Blase, L. C. Balbás, and Steven G. Louie

Phys. Rev. Lett. 77, 5442 (1996) - Published 30 December, 1996