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We present a theoretical framework to describe the collective emission of light by entangled atomic states. Our theory applies to the low-excitation regime, where most of the atoms are initially in the ground state, and relies on a bosonic descr[...]texto impreso
Cirac, J. I. ; Garay Elizondo, Luis Javier ; Blatt, L. ; Parkins, A. S. ; Zoller, P. | American Physical Society | 1994-01Laser cooling of a single trapped ion in a Paul trap is discussed theoretically in the Lamb-Dicke limit, with full consideration of the time dependence of the trapping potential. Resulting mean kinetic energies are defined as time averages over [...]texto impreso
We consider the tensors generating matrix product states and density operators in a spin chain. For pure states, we revise the renormalization procedure introduced in (Verstraete et al., 2005) and characterize the tensors corresponding to the fi[...]texto impreso
Matrix product vectors form the appropriate framework to study and classify one-dimensional quantum systems. In this work, we develop the structure theory of matrix product unitary operators (MPUs) which appear e.g. in the description of time ev[...]texto impreso
Garay Elizondo, Luis Javier ; Anglin, J. R. ; Cirac, J. I. ; Zoller, P. | American Physical Society | 2000-11-27It is shown that, in dilute-gas Bose-Einstein condensates, there exist both dynamically stable and unstable configurations which, in the hydrodynamic limit, exhibit a behavior resembling that of gravitational black holes. The dynamical instabili[...]texto impreso
Garay Elizondo, Luis Javier ; Cirac, J. I. ; Anglin, J. R. ; Zoller, P. | American Physical Society | 2001-02The sonic analog of a gravitational black hole in dilute-gas Bose-Einstein condensates is investigated. It is shown that there exist both dynamically stable and unstable configurations which, in the hydrodynamic limit, exhibit behaviors complete[...]
