Adiabatic Mach-Zehnder Interferometry on A Quantized Bose-Josephson Junction

Details Adiabatic Mach-Zehnder Interferometry on A Quantized Bose-Josephson Junction Adiabatic Mach-Zehnder Interferometry on A Quantized Bose-Josephson Junction

2006-03-15

arxiv.org/abs/quant-ph/0603129v4

Phys. Rev. Lett. 97, 150402 (2006)

Physics

Quantum Physics

Revised version, 4 pages, 4 figures, Accepted for publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.97.150402

We propose a scheme to achieve a Mach-Zehnder interferometry using a quantized Bose-Josephson junction with negative charging energy. The quantum adiabatic evolution through a dynamical bifurcation is used to accomplish the beam splitting and recombination. The negative charging energy ensures the existence of a path-entangled state which enhances the phase measurement precision to the Heisenberg limit. A feasible detection procedure is also presented. The scheme should be realizable with current technology.

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