Mesoscopic entanglement of atomic ensembles through non-resonant stimulated Raman scattering

Abstract

We propose a scheme of generating and verifying mesoscopic-level entanglement between two atomic ensembles using non-resonant stimulated Raman scattering. Entanglement can be generated by direct detection or balanced homodyne detection of the Stokes fields from the two cells, after they interfere on a beam splitter. The entanglement of the collective atomic fields can be transferred to the anti-Stokes fields in a readout process. By measuring the operator moments of the anti-Stokes fields, we can verify the presence of entanglement. We model the effects of practical factors such as Stokes field detector quantum efficiency and additive thermal noise in the entanglement generating process, and anti-Stokes field losses in the entanglement verification process, and find achievable regimes in which entanglement can be verified at the levels of tens to hundreds of atomic excitations in the ensembles.

35 papges, 6 figures and 1 table, accepted by Phys. Rev. A

References in corpus (16)

• Separability Criterion for Density Matrices
• Long-distance quantum communication with atomic ensembles and linear optics
• Inseparability criterion for continuous variable systems
• Experimental long-lived entanglement of two macroscopic objects
• Measurement-Induced Entanglement for Excitation Stored in Remote Atomic Ensembles
• Entanglement by a beam splitter: nonclassicality as a prerequisite for entanglement
• Inseparability criteria for bipartite quantum states
• Entanglement of remote atomic qubits
• Nonclassical Moments and their Measurement
• Three-dimensional theory for interaction between atomic ensembles and free-space light
• Shaping quantum pulses of light via coherent atomic memory
• Separability criterion for separate quantum systems
• Inseparability criteria based on matrices of moments
• Universal measurement of quantum correlations of radiation
• Nonlinear Interferometry via Fock State Projection
• Pairwise entanglement and readout of atomic-ensemble and optical wave-packet modes in traveling-wave Raman interactions

Cited by in corpus (4)

• Vacuum Fluctuations induced Entanglement between Two Mesoscopic Systems
• Observation of prolonged coherence time of the collective spin wave of atomic ensemble in a paraffin coated Rb vapor cell
• Correlation enhanced phase sensitive Raman scattering in atomic vapors
• Single-step controlled-NOT logic from any exchange interaction