Sub-Shot-Noise Magnetometry with a Correlated Spin-Relaxation Dominated Alkali-Metal Vapor
arXiv:0708.0330 · doi:10.1103/PhysRevLett.100.073002
Abstract
Spin noise sets fundamental limits to the precision of measurements using spin-polarized atomic vapors, such as performed with sensitive atomic magnetometers. Spin squeezing offers the possibility to extend the measurement precision beyond the standard quantum limit of uncorrelated atoms. Contrary to the current understanding, we show that even in the presence of spin relaxation, spin squeezing can lead to a significant reduction of spin noise, and hence an increase in magnetometric sensitivity, for a long measurement time. This is the case when correlated spin relaxation due to binary alkali-atom collisions dominates independently acting decoherence processes.
4 pages, submitted to Phys. Rev. Lett
References in corpus (16)
- Entanglement of a Pair of Quantum Bits
- Experimental long-lived entanglement of two macroscopic objects
- On the Improvement of Frequency Stardards with Quantum Entanglement
- Resonant nonlinear magneto-optical effects in atoms
- Nuclear spin gyroscope based on an atomic co-magnetometer
- Quantum communication between atomic ensembles using coherent light
- Spectroscopy of spontaneous spin noise as a probe of spin dynamics and magnetic resonance
- Quantum information and precision measurement
- Quantum Kalman Filtering and the Heisenberg Limit in Atomic Magnetometry
- Can a quantum nondemolition measurement improve the sensitivity of an atomic magnetometer?
- Spin squeezing and precision probing with light and samples of atoms in the gaussian approximation
- Tensor polarizability and dispersive quantum measurement of multilevel atoms
- Spin Squeezing via One-Axis Twisting with Coherent Light
- Suppression of Spin Projection Noise in Broadband Atomic Magnetometry
- Teleportation and spin squeezing utilizing multimode entanglement of light with atoms
- Spin Relaxation Resonances Due to the Spin-Axis Interaction in Dense Rubidium and Cesium Vapor
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- Quantum metrology with nonclassical states of atomic ensembles
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- Semiconductor Spin Noise Spectroscopy: Fundamentals, Accomplishments, and Challenges
- Measurement-induced nonlocal entanglement in a hot, strongly-interacting atomic system
- Improved Quantum Magnetometry beyond the Standard Quantum Limit
- Stroboscopic back-action evasion in a dense alkali-metal vapor
- Quantum interface for noble-gas spins based on spin-exchange collisions
- Protecting and Enhancing Spin Squeezing via Continuous Dynamical Decoupling
- Optical quantum memory for noble-gas spins based on spin-exchange collisions
- Spin-exchange collisions in hot vapors create and sustain bipartite entanglement
- Inter-species spin-noise correlations in hot atomic vapors
- Quantum thermodynamic derivation of the energy resolution limit in magnetometry
- Zero-field spin noise spectrum of an alkali vapor with strong spin-exchange coupling
- Magnetic-field-independent spin-exchange relaxation-free magnetometer
- Quantum Zeno effect in atomic spin-exchange collisions
- Fast spin squeezing by distance-selective long-range interactions with Rydberg molecule dressing
- Quantum metrology and its application in biology