23.60.+d Study of decoherence

Stabilization of nonclassical states of one and two-mode radiation fields by reservoir engineering


A. Sarlette, Z. Leghtas, M. Brune, J.M. Raimond, P. Rouchon


Phys. Rev. A 86, 012114 (2012)

We analyze a quantum reservoir engineering method, originally introduced by [Sarlette et al. in Phys. Rev. Lett. 107, 010402 (2011) -- arXiv 1011.5057], for the stabilization of non-classical field states in high quality cavities. We generalize the method to the protection of mesoscopic entangled field states shared by two non-degenerate field modes. The reservoir is made up of a stream of atoms undergoing successive composite interactions with the cavity, each combining resonant with non-resonant parts.

Ramsey interference in one dimensional systems: The full distribution function of fringe contrast as a probe of many-body dynamics


T. Kitagawa, S. Pielawa, A. Imambekov, J. Schmiedmayer, V. Gritsev, E. Demler
Phys. Rev. Lett., 104, 255302 (2010)

We theoretically analyze Ramsey interference experiments in one-dimensional quasicondensates and obtain explicit expressions for the time evolution of full distribution functions of fringe contrast. We show that distribution functions contain unique signatures of the many-body mechanism of decoherence. We argue that Ramsey interference experiments provide a powerful tool for analyzing strongly correlated nature of 1D interacting systems.

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