Quantum lock-in detection of a vector light shift
arXiv:2101.09102 · doi:10.1103/PhysRevA.103.043335
Abstract
We demonstrate detection of a vector light shift (VLS) using the quantum lock-in method. The method offers precise and accurate VLS measurement without being affected by real magnetic field fluctuations. We detect a VLS on a Bose--Einstein condensate (BEC) of Rb atoms caused by an optical trap beam with a resolution less than 1 Hz. We also demonstrate elimination of a VLS by controlling the beam polarization to realize a long coherence time of a transversally polarized = 2 BEC. Quantum lock-in VLS detection should find wide application, including the study of spinor BECs, electric-dipole moment searches, and precise magnetometry.
arXiv comment6 pages, 5 figures
References in corpus (25)
- Many-Body Physics with Ultracold Gases
- Quantum-enhanced measurements: beating the standard quantum limit
- Quantum metrology
- Spin domains in ground state spinor Bose-Einstein condensates
- Realization of Bose-Einstein condensates in lower dimensions
- Controlled Collisions for Multiparticle Entanglement of Optically Trapped Atoms
- Bose-Einstein condensation of atoms in a uniform potential
- Coherent transport of neutral atoms in spin-dependent optical lattice potentials
- Colloquium: Physics of optical lattice clocks
- Quantum-state control in optical lattices
- Single Ion Quantum Lock-In Amplifier
- Single-spin magnetometry with multi-pulse sensing sequences
- Quantum limit of optical magnetometry in the presence of ac-Stark shifts
- Quantum control and measurement of atomic spins in polarization spectroscopy
- Magnetically tuned spin dynamics resonance
- Tensor polarizability and dispersive quantum measurement of multilevel atoms
- State-dependent optical lattices for the strontium optical qubit
- Constraints on long-range spin-gravity and monopole-dipole couplings of the proton
- Spin-dependent inelastic collisions in spin-2 Bose-Einstein condensates
- In-situ measurement of vacuum window birefringence by atomic spectroscopy
- Magic-wavelength Faraday probe measures spin continuously and without light shifts
- In-situ measurement of light polarization with ellipticity-induced nonlinear magneto-optical rotation
- Measurement and extinction of vector light shifts using interferometry of spinor condensates
- Dissipation-assisted coherence formation in a spinor quantum gas
- Sensitive BEC magnetometry with optimized probing