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Showing 2002 · quant-phShow all

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quant-ph2002★ 65 cited

Entanglement generation and Hamiltonian simulation in Continuous-Variable Systems

Barbara Kraus, Klemens Hammerer, Geza Giedke +1

Several recent experiments have demonstrated the promise of atomic ensembles for quantum teleportation and quantum memory. In these cases the collective internal state of the atoms…

quant-ph2002★ 4 cited

One-atom maser: Non-separable atom pairs

Berthold-Georg Englert, Pavel Lougovski, Enrique Solano +1

When a one-atom maser is operated in the standard way -- excited, resonant two-level atoms traverse the resonator at random times -- the emerging atoms are entangled with the cavit…

quant-ph2002★ 41 cited

Quantum computation with unknown parameters

J. J. Garcia-Ripoll, J. I. Cirac

We show how it is possible to realize quantum computations on a system in which most of the parameters are practically unknown. We illustrate our results with a novel implementatio…

quant-ph2002★ 103 cited

Phase-dependent interaction in a 4-level atomic configuration

Giovanna Morigi, Sonja Franke-Arnold, Gian-Luca Oppo

We study a four-level atomic scheme interacting with four lasers in a closed-loop configuration with a (diamond) geometry. We investigate the influence of the laser…

quant-ph2002★ 21 cited

Relating the Lorentzian and exponential: Fermi's approximation,the Fourier transform and causality

A. Bohm, N. L. Harshman, H. Walther

The Fourier transform is often used to connect the Lorentzian energy distribution for resonance scattering to the exponential time dependence for decaying states. However, to apply…

quant-ph2002★ 30 cited

Spontaneous emission of an atom in front of a mirror

Almut Beige, Jiannis Pachos, Herbert Walther

Motivated by a recent experiment [J. Eschner {\it et al.}, Nature {\bf 413}, 495 (2001)], we now present a theoretical study on the fluorescence of an atom in front of a mirror. On…