Interferometry with Entangled Atoms

Details Interferometry with Entangled Atoms Interferometry with Entangled Atoms

2001-02-01

arxiv.org/abs/quant-ph/0102006v2

Physics

Quantum Physics

6 pages, RevTeX. Revised version

Scientific paper

A quantum gravity-gradiometer consists of two spatially separated ensembles of atoms interrogated by pulses of a common laser beam. Laser pulses cause the probability amplitudes of atomic ground-state hyperfine levels to interfere, producing two motion-sensitive phase shifts which allow the measurement of the average acceleration of each ensemble, and, via simple differencing, of the acceleration gradient. Here I propose entangling the quantum states of the two ensembles prior to the pulse sequence, and show that entanglement encodes their relative acceleration in a single interference phase which can be measured directly, with no need for differencing.

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