Quantum memory for entangled two-mode squeezed states

Details Quantum memory for entangled two-mode squeezed states Quantum memory for entangled two-mode squeezed states

2010-02-09

arxiv.org/abs/1002.1920v1

Nature Physics. Volume: 7, Pages:13-16 (2011)

Physics

Quantum Physics

main text 5 pages, supplementary information 3 pages

Scientific paper

10.1038/nphys1819

A quantum memory for light is a key element for the realization of future quantum information networks. Requirements for a good quantum memory are (i) versatility (allowing a wide range of inputs) and (ii) true quantum coherence (preserving quantum information). Here we demonstrate such a quantum memory for states possessing Einstein-Podolsky-Rosen (EPR) entanglement. These multi-photon states are two-mode squeezed by 6.0 dB with a variable orientation of squeezing and displaced by a few vacuum units. This range encompasses typical input alphabets for a continuous variable quantum information protocol. The memory consists of two cells, one for each mode, filled with cesium atoms at room temperature with a memory time of about 1msec. The preservation of quantum coherence is rigorously proven by showing that the experimental memory fidelity 0.52(2) significantly exceeds the benchmark of 0.45 for the best possible classical memory for a range of displacements.

Affiliated with

Also associated with

No associations

Rating

Quantum memory for entangled two-mode squeezed states 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 Quantum memory for entangled two-mode squeezed states, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum memory for entangled two-mode squeezed states will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-125109