Volume 92, Issue 20

21 May 2004

Browse Issues:

On the Cover

Representation of a femtosecond laser pulse that has been polarization modulated, in both degree of polarization and orientation of the principal axes, so as to increase the level of quantum control. The colors indicate the momentary frequencies and the shadows represent the amplitude envelopes of the two orthogonal components.

From the article:

Quantum Control by Ultrafast Polarization Shaping
T. Brixner, G. Krampert, T. Pfeifer, R. Selle, G. Gerber, M. Wollenhaupt, O. Graefe, C. Horn, D. Liese, and T. Baumert
Phys. Rev. Lett. 92, 208301 (2004)

LETTERS

General Physics

Correlations in Atomic Systems: Diagnosing Coherent Superpositions

Radka Bach and Kazimierz Rza̧żewski

Phys. Rev. Lett. 92, 200401 (2004) - Published 17 May, 2004

Collective Molecule Formation in a Degenerate Fermi Gas via a Feshbach Resonance

Juha Javanainen, Marijan Kos̆trun, Yi Zheng, Andrew Carmichael, Uttam Shrestha, Patrick J. Meinel, Matt Mackie, Olavi Dannenberg, and Kalle-Antti Suominen

Phys. Rev. Lett. 92, 200402 (2004) - Published 20 May, 2004

Dynamical Control of Macroscopic Quantum Tunneling

A. Barone, G. Kurizki, and A. G. Kofman

Phys. Rev. Lett. 92, 200403 (2004) - Published 20 May, 2004

Gravitation and Astrophysics

Fixed Points of Quantum Gravity

Daniel F. Litim

Phys. Rev. Lett. 92, 201301 (2004) - Published 19 May, 2004

Constraining the Topology of the Universe

Neil J. Cornish, David N. Spergel, Glenn D. Starkman, and Eiichiro Komatsu

Phys. Rev. Lett. 92, 201302 (2004) - Published 19 May, 2004

Possibility of Observable Amount of Gravitational Waves from Inflation

L. Pilo, A. Riotto, and A. Zaffaroni

Phys. Rev. Lett. 92, 201303 (2004) - Published 19 May, 2004

Evolution of the Dark Matter Distribution at the Galactic Center

David Merritt

Phys. Rev. Lett. 92, 201304 (2004) - Published 20 May, 2004

Regularization of the Linearized Gravitational Self-Force for Branes

Richard A. Battye, Brandon Carter, and Andrew Mennim

Phys. Rev. Lett. 92, 201305 (2004) - Published 21 May, 2004

Elementary Particles and Fields

Spontaneous Violation of $C P$ Symmetry in the Strong Interactions

Michael Creutz

Phys. Rev. Lett. 92, 201601 (2004) - Published 21 May, 2004

Lower Limits on $R$ -Parity-Violating Couplings in Supersymmetric Models with Light Squarks

Edmond L. Berger and Zack Sullivan

Phys. Rev. Lett. 92, 201801 (2004) - Published 17 May, 2004

Measurements of Branching Fractions and $C P$ -Violating Asymmetries in $B$ Meson Decays to Charmless Two-Body States Containing a $K^{0}$

B. Aubert et al. (BABAR Collaboration)

Phys. Rev. Lett. 92, 201802 (2004) - Published 20 May, 2004

Supersymmetric Right-Handed $s − b$ Flavor Mixing: Implications of ${\bar{B}}^{0} \to ϕ K_{S}$ Anomaly for $B$ Factories and Colliders

Chun-Khiang Chua, Wei-Shu Hou, and Makiko Nagashima

Phys. Rev. Lett. 92, 201803 (2004) - Published 21 May, 2004

Model-Independent Results for SU(3) Violation in Light-Cone Distribution Functions

Jiunn-Wei Chen and Iain W. Stewart

Phys. Rev. Lett. 92, 202001 (2004) - Published 19 May, 2004

Measurement of the Branching Fractions and $C P$ Asymmetry of $B^{-} \to D_{(C P)}^{0} K^{-}$ Decays with the BABAR Detector

B. Aubert et al. (BABAR Collaboration)

Phys. Rev. Lett. 92, 202002 (2004) - Published 20 May, 2004

Nuclear Physics

Exclusive Measurement of Quasifree Proton-Neutron Bremsstrahlung

M. Volkerts, J. C. S. Bacelar, M. J. van Goethem, M. N. Harakeh, M. Hoefman, H. Huisman, N. Kalantar-Nayestanaki, S. Kopecky, H. Löhner, J. G. Messchendorp, K. Nakayama, R. W. Ostendorf, S. Schadmand, O. Scholten, and H. W. Wilschut

Phys. Rev. Lett. 92, 202301 (2004) - Published 19 May, 2004

Supersymmetric Patterns in the Pseudospin, Spin, and Coulomb Limits of the Dirac Equation with Scalar and Vector Potentials

A. Leviatan

Phys. Rev. Lett. 92, 202501 (2004) - Published 19 May, 2004

Atomic, Molecular, and Optical Physics

Multiphoton Double Ionization via Field-Independent Resonant Excitation

J. Rudati, J. L. Chaloupka, P. Agostini, K. C. Kulander, and L. F. DiMauro

Phys. Rev. Lett. 92, 203001 (2004) - Published 19 May, 2004

Spontaneous Emission Lifetime of a Single Trapped ${Ca}^{+}$ Ion in a High Finesse Cavity

A. Kreuter, C. Becher, G. P. T. Lancaster, A. B. Mundt, C. Russo, H. Häffner, C. Roos, J. Eschner, F. Schmidt-Kaler, and R. Blatt

Phys. Rev. Lett. 92, 203002 (2004) - Published 19 May, 2004

Dissociation Energies of Molecular Hydrogen and the Hydrogen Molecular Ion

Y. P. Zhang, C. H. Cheng, J. T. Kim, J. Stanojevic, and E. E. Eyler

Phys. Rev. Lett. 92, 203003 (2004) - Published 20 May, 2004

Electron-Electron Interaction in Strong Electromagnetic Fields: The Two-Electron Contribution to the Ground-State Energy in He-like Uranium

A. Gumberidze, Th. Stöhlker, D. Banaś, K. Beckert, P. Beller, H. F. Beyer, F. Bosch, X. Cai, S. Hagmann, C. Kozhuharov, D. Liesen, F. Nolden, X. Ma, P. H. Mokler, A. Oršić-Muthig, M. Steck, D. Sierpowski, S. Tashenov, A. Warczak, and Y. Zou

Phys. Rev. Lett. 92, 203004 (2004) - Published 20 May, 2004

Coherence in Microchip Traps

Philipp Treutlein, Peter Hommelhoff, Tilo Steinmetz, Theodor W. Hänsch, and Jakob Reichel

Phys. Rev. Lett. 92, 203005 (2004) - Published 21 May, 2004

Collective Excitations of a Degenerate Gas at the BEC-BCS Crossover

M. Bartenstein, A. Altmeyer, S. Riedl, S. Jochim, C. Chin, J. Hecker Denschlag, and R. Grimm

Phys. Rev. Lett. 92, 203201 (2004) - Published 19 May, 2004

Quantum Interference of Ultrastable Twin Optical Beams

Sheng Feng and Olivier Pfister

Phys. Rev. Lett. 92, 203601 (2004) - Published 21 May, 2004

Electromagnetically Induced Transparency with Squeezed Vacuum

Daisuke Akamatsu, Keiichirou Akiba, and Mikio Kozuma

Phys. Rev. Lett. 92, 203602 (2004) - Published 21 May, 2004

Nonlinear Dynamics, Fluid Dynamics, Classical Optics, etc.

Sub- and Superluminal Propagation of Intense Pulses in Media with Saturated and Reverse Absorption

G. S. Agarwal and Tarak Nath Dey

Phys. Rev. Lett. 92, 203901 (2004) - Published 19 May, 2004

Rare Events and Scale-Invariant Dynamics of Perturbations in Delayed Chaotic Systems

Alejandro D. Sánchez, Juan M. López, Miguel A. Rodríguez, and Manuel A. Matías

Phys. Rev. Lett. 92, 204101 (2004) - Published 21 May, 2004

Huge Fluctuations in Weight Measurements at the Bottom of a Two-Dimensional Vertical Sheet of Grains

Bruno Gilles, Emmanuel Lévêque, Claude Laroche, and Christophe Coste

Phys. Rev. Lett. 92, 204301 (2004) - Published 19 May, 2004

Plasma and Beam Physics

Ultralow Emittance, Multi-MeV Proton Beams from a Laser Virtual-Cathode Plasma Accelerator

T. E. Cowan, J. Fuchs, H. Ruhl, A. Kemp, P. Audebert, M. Roth, R. Stephens, I. Barton, A. Blazevic, E. Brambrink, J. Cobble, J. Fernández, J.-C. Gauthier, M. Geissel, M. Hegelich, J. Kaae, S. Karsch, G. P. Le Sage, S. Letzring, M. Manclossi, S. Meyroneinc, A. Newkirk, H. Pépin, and N. Renard-LeGalloudec

Phys. Rev. Lett. 92, 204801 (2004) - Published 19 May, 2004

Spectral Distributions of Thomson-Scattered Photons from High-Intensity Pulsed Lasers

G. A. Krafft

Phys. Rev. Lett. 92, 204802 (2004) - Published 19 May, 2004

Effects of Nonuniform Illumination on Implosion Asymmetry in Direct-Drive Inertial Confinement Fusion

C. K. Li, F. H. Séguin, J. A. Frenje, R. D. Petrasso, J. A. Delettrez, P. W. McKenty, T. C. Sangster, R. L. Keck, J. M. Soures, F. J. Marshall, D. D. Meyerhofer, V. N. Goncharov, J. P. Knauer, P. B. Radha, S. P. Regan, and W. Seka

Phys. Rev. Lett. 92, 205001 (2004) - Published 19 May, 2004

Electron Acceleration in an Ultraintense-Laser-Illuminated Capillary

Yoneyoshi Kitagawa, Yasuhiko Sentoku, Shin Akamatsu, Wataru Sakamoto, Ryosuke Kodama, Kazuo A. Tanaka, Ken Azumi, Takayoshi Norimatsu, Takeshi Matsuoka, Hisanori Fujita, and Hidetsugu Yoshida

Phys. Rev. Lett. 92, 205002 (2004) - Published 19 May, 2004