Coherent shift of localized bound pair in Bose Hubbard model

Details Coherent shift of localized bound pair in Bose Hubbard model Coherent shift of localized bound pair in Bose Hubbard model

2008-11-17

arxiv.org/abs/0811.2705v1

PRA 79, 032108 (2009)

Physics

Quantum Physics

5 pages, 3 figures

Scientific paper

10.1103/PhysRevA.79.032108

Based on the exact results obtained by Bethe ansatz, we demonstrate the existence of stable bound pair (BP) wave packet in Bose Hubbard model with arbitrary on-site interaction U. In large-U regime, it is found that an incoming single-particle (SP) can coherently pass through a BP wave packet and leave a coherent shift in the position of it. This suggests a simple scheme for constructing a BP charge qubit to realize a quantum switch, which is capable of controlling the coherent transport of one and only one photon in a one-dimensional waveguide.

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