Quantum-limited measurement of magnetic-field gradient with entangled atoms
arXiv:1301.3242 · doi:10.1103/PhysRevA.87.043602
Abstract
We propose a method to detect the microwave magnetic-field gradient by using a pair of entangled two-component Bose-Einstein condensates. We consider the two spatially separated condensates to be coupled to the two different magnetic fields. The magnetic-field gradient can be determined by measuring the variances of population differences and relative phases between the two-component condensates in two wells. The precision of measurement can reach the Heisenberg limit. We study the effects of one-body and two-body atom losses on the detection. We find that the entangled atoms can outperform the uncorrelated atoms in probing the magnetic fields in the presence of atom losses. The effect of atom-atom interactions is also discussed.
arXiv comment8 pages, 12 figures
References in corpus (26)
- Quantum entanglement
- Quantum-enhanced measurements: beating the standard quantum limit
- Optical Magnetometry
- Direct Observation of Tunneling and Nonlinear Self-Trapping in a single Bosonic Josephson Junction
- Many-particle entanglement with Bose--Einstein condensates
- Nonlinear atom interferometer surpasses classical precision limit
- Atom chip based generation of entanglement for quantum metrology
- Squeezing and entanglement in a Bose-Einstein condensate
- Direct Observation of Second Order Atom Tunnelling
- Long Phase Coherence Time and Number Squeezing of two Bose-Einstein Condensates on an Atom Chip
- Coherence in Microchip Traps
- High-Resolution Magnetometry with a Spinor Bose-Einstein Condensate
- Effect of cold collisions on spin coherence and resonance shifts in a magnetically trapped ultra-cold gas
- Non-Equilibrium Dynamics and Superfluid Ring Excitations in Binary Bose-Einstein Condensates
- Sensing electric and magnetic fields with Bose-Einstein Condensates
- Extended Coherence Time with Atom-Number Squeezed Sources
- Imaging of microwave fields using ultracold atoms
- Atom interferometry with trapped Bose-Einstein condensates: Impact of atom-atom interactions
- Quantum limited measurements of atomic scattering properties
- Transporting, splitting and merging of atomic ensembles in a chip trap
- Entanglement enhanced atomic gyroscope
- Entangled quantum tunneling of two-component Bose-Einstein condensates
- Quantum Phase Estimation with Entangled Photons produced by Parametric Down Conversion
- Robust quantum enhanced phase estimation in a multimode interferometer
- Optimal Gaussian squeezed states for atom-interferometry in the presence of phase diffusion
- Steady-state entanglement in a double-well Bose-Einstein condensate through coupling to a superconducting resonator
Cited by in corpus (6)
- Dissipative Quantum Metrology with Spin Cat States
- Quantum estimation of magnetic-field gradient using W-state
- Fitting magnetic field gradient with Heisenberg-scaling accuracy
- Many-body quantum lock-in amplifier
- Entanglement Distribution in Star Network Based on Spin Chain in Diamond
- Quantum sensing with ultracold simulators in lattice and ensemble systems: a review