Non-adiabatically detecting the geometric phase of the macroscopic quantum state with symmetric SQUID

Details Non-adiabatically detecting the geometric phase of the macroscopic quantum state with symmetric SQUID Non-adiabatically detecting the geometric phase of the macroscopic quantum state with symmetric SQUID

2001-04-26

arxiv.org/abs/quant-ph/0104127v4

Phys. Rev. B65, 172508(2002)

Physics

Quantum Physics

8 pages, 4 figures

Scientific paper

10.1103/PhysRevB.65.172508

We give a simple way to detect the geometric phase shift and the conditional geometric phase shift with Josephson junction system. Comparing with the previous work(Falcl G, Fazio R, Palma G.M., Siewert J and Verdal V, {\it Nature} {\bf 407}, 355(2000)), our scheme has two advantages. We use the non-adiabatic operation, thus the detection is less affected by the decoherence. Also, we take the time evolution on zero dynamic phase loop, we need not take any extra operation to cancel the dynamic phase.

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