Sensitivity to thermal noise of atomic Einstein-Podolsky-Rosen entanglement
arXiv:1304.0297 · doi:10.1103/PhysRevA.87.063635
Abstract
We examine the prospect of demonstrating Einstein-Podolsky-Rosen (EPR) entanglement for massive particles using spin-changing collisions in a spinor Bose-Einstein condensate. Such a demonstration has recently been attempted by Gross et al. [Nature 480, 219 (2011)] using a condensate of Rb-87 atoms trapped in an optical lattice potential. For the condensate initially prepared in the (F,m_{F})=(2,0) hyperfine state, with no population in the m_{F}=+-1 states, we predict a significant suppression of the product of inferred quadrature variances below the Heisenberg uncertainty limit, implying strong EPR entanglement. However, such EPR entanglement is lost when the collisions are initiated in the presence of a small (currently undetectable) thermal population n_{th} in the m_{F}=+-1 states. For condensates containing 150 to 200 atoms, we predict an upper bound of n_{th}~1 that can be tolerated in this experiment before EPR entanglement is lost.
7 pages, 4 figures. Modifications to Figs. 2, 3 and 4 and text
References in corpus (10)
- Optomechanical entanglement between a movable mirror and a cavity field
- Nonlinear atom interferometer surpasses classical precision limit
- Atomic homodyne detection of continuous variable entangled twin-atom states
- Magnetically tuned spin dynamics resonance
- Violation of the Cauchy-Schwarz inequality with matter waves
- Sub-Poissonian number differences in four-wave mixing of matter waves
- Detection of continuous variable entanglement without coherent local oscillators
- Einstein-Podolsky-Rosen correlations from colliding Bose-Einstein condensates
- Thermal spin fluctuations in spinor Bose-Einstein condensates
- Quantum-state steering in optomechanical devices
Cited by in corpus (13)
- Quantum-Enhanced Sensing Based on Time Reversal of Nonlinear Dynamics
- 0.75 atoms improve the clock signal of 10,000 atoms
- Pumped-up SU(1,1) interferometry
- Satisfying the Einstein-Podolsky-Rosen criterion with massive particles
- Non-Gaussianity as a signature of a quantum theory of gravity
- Decoherence of Einstein-Podolsky-Rosen steering
- Quantum Fisher Information as a Predictor of Decoherence in the Preparation of Spin-Cat States for Quantum Metrology
- Spin- and Momentum-Correlated Atom Pairs Mediated by Photon Exchange and Seeded by Vacuum Fluctuations
- Active SU(1,1) atom interferometry
- Source of entangled atom pairs on demand, using the Rydberg blockade
- Einstein-Podolsky-Rosen steering, depth of steering and planar spin squeezing in two-mode Bose-Einstein condensates
- Anisotropy in s-wave Bose-Einstein condensate collisions and its relationship to superradiance
- Tailored generation of quantum states in an entangled spinor interferometer to overcome detection noise