Reduced back-action for phase sensitivity 10 times beyond the standard quantum limit
arXiv:1310.3177 · doi:10.1038/nphoton.2014.151
Abstract
Collective measurements can project a system into an entangled state with enhanced sensitivity for measuring a quantum phase, but measurement back-action has limited previous efforts to only modest improvements. Here we use a collective measurement to produce and directly observe, with no background subtraction, an entangled, spin-squeezed state with phase resolution improved in variance by a factor of 10.5(1.5), or 10.2(6) dB, compared to the initially unentangled ensemble of N = 4.8 x 10^5 87Rb atoms. The measurement uses a cavity-enhanced probe of an optical cycling transition to mitigate back-action associated with state-changing transitions induced by the probe. This work establishes collective measurements as a powerful technique for generating entanglement for precision measurement, with potential impacts in biological sensing, communication, navigation, and tests of fundamental physics.
9 figures, 1 table
References in corpus (12)
- 14-qubit entanglement: creation and coherence
- An Optical Lattice Clock with Accuracy and Stability at the Level
- Nonlinear atom interferometer surpasses classical precision limit
- Squeezing and entanglement in a Bose-Einstein condensate
- Quantum Teleportation Between Distant Matter Qubits
- Progressive field-state collapse and quantum non-demolition photon counting
- Twin matter waves for interferometry beyond the classical limit
- Deterministic entanglement of superconducting qubits by parity measurement and feedback
- Detecting multiparticle entanglement of Dicke states
- Quantum Non-Demolition Detection of Strongly Correlated Systems
- Spin squeezing in a Rydberg lattice clock
- Spin squeezing of atomic ensembles by multi-colour quantum non-demolition measurements
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