Single atom-scale diamond defect allows large Aharonov-Casher phase

Details Single atom-scale diamond defect allows large Aharonov-Casher phase Single atom-scale diamond defect allows large Aharonov-Casher phase

2009-10-22

arxiv.org/abs/0910.4216v1

Phys. Rev. A 80 040104(R) (2009)

Physics

Quantum Physics

5 pages, 2 figures

Scientific paper

We propose an experiment that would produce and measure a large Aharonov-Casher (A-C) phase in a solid-state system under macroscopic motion. A diamond crystal is mounted on a spinning disk in the presence of a uniform electric field. Internal magnetic states of a single NV defect, replacing interferometer trajectories, are coherently controlled by microwave pulses. The A-C phase shift is manifested as a relative phase, of up to 17 radians, between components of a superposition of magnetic substates, which is two orders of magnitude larger than that measured in any other atom-scale quantum system.

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