Physics – Quantum Physics
Scientific paper
2005-12-19
Phys. Rev. A 73, 063816 (2006)
Physics
Quantum Physics
Scientific paper
10.1103/PhysRevA.73.063816
We analyze quantum entanglement of Stokes light and atomic electronic polarization excited during single-pass, linear-regime, stimulated Raman scattering in terms of optical wave-packet modes and atomic-ensemble spatial modes. The output of this process is confirmed to be decomposable into multiple discrete, bosonic mode pairs, each pair undergoing independent evolution into a two-mode squeezed state. For this we extend the Bloch-Messiah reduction theorem, previously known for discrete linear systems (S. L. Braunstein, Phys. Rev. A, vol. 71, 055801 (2005)). We present typical mode functions in the case of one-dimensional scattering in an atomic vapor. We find that in the absence of dispersion, one mode pair dominates the process, leading to a simple interpretation of entanglement in this continuous-variable system. However, many mode pairs are excited in the presence of dispersion-induced temporal walkoff of the Stokes, as witnessed by the photon-count statistics. We also consider the readout of the stored atomic polarization using the anti-Stokes scattering process. We prove that the readout process can also be decomposed into multiple mode pairs, each pair undergoing independent evolution analogous to a beam-splitter transformation. We show that this process can have unit efficiency under realistic experimental conditions. The shape of the output light wave packet can be predicted. In case of unit readout efficiency it contains only excitations originating from a specified atomic excitation mode.
Raymer Michael G.
Wasilewski Wojciech
No associations
LandOfFree
Pairwise entanglement and readout of atomic-ensemble and optical wave-packet modes in traveling-wave Raman interactions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Pairwise entanglement and readout of atomic-ensemble and optical wave-packet modes in traveling-wave Raman interactions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pairwise entanglement and readout of atomic-ensemble and optical wave-packet modes in traveling-wave Raman interactions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-281967