Interferometry with entangled atoms |
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Authors: | U Yurtsever D Strekalov JP Dowling |
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Affiliation: | (1) Quantum Computing Technologies Group, Sec. 367, Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109-8099, USA, US |
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Abstract: | A quantum gravity-gradiometer consists of two spatially separated ensembles of atoms interrogated by pulses of a common laser
beam. The 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 we propose entangling the quantum states of atoms from 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.
Received 6 June 2002 / Received in final form 25 October 2002 Published online 28 January 2003 |
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Keywords: | PACS 39 20 +q Atom interferometry techniques – 03 75 Dg Atom and neutron interferometry – 03 67 -a Quantum information – 03 67 Lx Quantum computation |
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