Mach-Zehnder interferometry with interacting trapped Bose-Einstein condensates

Journal Article · Mon Aug 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.023619· OSTI ID:22075517

Grond, Julian ^[1]; Hohenester, Ulrich ^[1]; Schmiedmayer, Joerg ^[2]; Smerzi, Augusto ^[3]

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1. Institut fuer Physik, Karl-Franzens-Universitaet Graz, 8010 Graz (Austria)
2. Vienna Center for Quantum Science and Technology, Atominstitut, Technische Universitaet Wien, 1020 Vienna (Austria)
3. INO-CNR BEC Center and Dipartimento di Fisica, Universita di Trento, 38123 Povo (Italy)

We theoretically analyze a Mach-Zehnder interferometer with trapped condensates and find that it is surprisingly stable against the nonlinearity induced by interparticle interactions. The phase sensitivity, which we study for number-squeezed input states, can overcome the shot noise limit and be increased up to the Heisenberg limit provided that a Bayesian or maximum-likelihood phase estimation strategy is used. We finally demonstrate the robustness of the Mach-Zehnder interferometer in the presence of interactions against condensate oscillations and a realistic atom-counting error.

• OSTI ID: 22075517
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 84; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
BOSE-EINSTEIN CONDENSATION
INTERACTIONS
INTERFEROMETRY
MACH-ZEHNDER INTERFEROMETER
MAXIMUM-LIKELIHOOD FIT
NONLINEAR PROBLEMS
OSCILLATIONS
SENSITIVITY
TRAPPING