5 papers
Ultrahigh reflection from a medium with ultraslow group velocity
V. V. Kozlov, S. Wallentowitz, S. Raghavan
We show that an incident wavepacket at the boundary to a medium with extremely slow group velocity, experiences enhanced reflection and a substantial spatial and temporal distortio…
Generation of arbitrary Dicke states in spinor Bose-Einstein condensates
S. Raghavan, H. Pu, P. Meystre +1
We demonstrate that the combination of two-body collisions and applied Rabi pulses makes it possible to prepare arbitrary Dicke (spin) states as well as maximally entangled states…
Macroscopic Quantum Fluctuations in the Josephson Dynamics of Two Weakly Linked Bose-Einstein Condensates
Augusto Smerzi, Srikanth Raghavan
We study the quantum corrections to the Gross-Pitaevskii equation for two weakly linked Bose-Einstein condensates. The goals are: 1) to investigate dynamical regimes at the borderl…
Quantum versus Semiclassical Description of Selftrapping: Anharmonic Effects
S. Raghavan, A. R. Bishop, V. M. Kenkre
Selftrapping has been traditionally studied on the assumption that quasiparticles interact with harmonic phonons and that this interaction is linear in the displacement of the phon…
Analysis of the Interplay of Quantum Phases and Nonlinearity Applied to Dimers with Anharmonic Interactions
S. Raghavan
We extend our analysis of the effects of the interplay of quantum phases and nonlinearity to address saturation effects in small quantum systems. We find that initial phases dramat…