Dynamical creation of entangled bosonic states in a double well

Details Dynamical creation of entangled bosonic states in a double well Dynamical creation of entangled bosonic states in a double well

2011-03-22

arxiv.org/abs/1103.4231v1

J. Phys. B: At. Mol. Opt. Phys. 44, 145302 (2011)

Physics

Condensed Matter

Quantum Gases

13 pages, 6 figures

Scientific paper

10.1088/0953-4075/44/14/14530

We study the creation of a bosonic N00N state from the evolution of a Fock state in a double well. While noninteracting bosons disappear quickly in the Hilbert space, the evolution under the influence of a Bose-Hubbard Hamiltonian is much more restricted. This restriction is caused by the fragmentation of the spectrum into a high-energy part with doubly degenerate levels and a nondegenerate low-energy part. This degeneracy suppresses transitions to states of the high-energy part of the spectrum. At a moderate interaction strength this effect supports strongly the dynamical formation of a N00N state. The N00N state is suppressed in an asymmetric double well, where the double degeneracy is absent.

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