Robust sub-shot-noise measurement via Rabi-Josephson oscillations in bimodal Bose-Einstein condensates

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.063628· OSTI ID:21550173

Tikhonenkov, I; Vardi, A ^[1]; Moore, M G ^[2]

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1. Department of Chemistry, Ben-Gurion University of the Negev, P.O.B. 653, Beer-Sheva 84105 (Israel)
2. Department of Physics and Astronomy, Michigan State Univerity, East Lansing, Michigan 48824 (United States)

Mach-Zehnder atom interferometry requires hold-time phase squeezing to attain readout accuracy below the standard quantum limit. This increases its sensitivity to phase diffusion, restoring shot-noise scaling of the optimal signal-to-noise ratio in the presence of interactions. The contradiction between the preparations required for readout accuracy and robustness to interactions is removed by monitoring Rabi-Josephson oscillations instead of relative-phase oscillations during signal acquisition. Optimizing the signal-to-noise ratio with a Gaussian squeezed input, we find that hold-time number squeezing satisfies both demands and that sub-shot-noise scaling is retained even for strong interactions.

• OSTI ID: 21550173
• Journal Information: Physical Review. A, Vol. 83, Issue 6; Other Information: DOI: 10.1103/PhysRevA.83.063628; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ACCURACY
ATOMS
BOSE-EINSTEIN CONDENSATION
DIFFUSION
MACH-ZEHNDER INTERFEROMETER
MONITORING
OPTIMIZATION
PHASE OSCILLATIONS
QUANTUM MECHANICS
READOUT SYSTEMS
SCALING
SENSITIVITY
SIGNAL-TO-NOISE RATIO
STRONG INTERACTIONS
BASIC INTERACTIONS
BEAM DYNAMICS
DIMENSIONLESS NUMBERS
DYNAMICS
INTERACTIONS
INTERFEROMETERS
MEASURING INSTRUMENTS
MECHANICS
OSCILLATIONS