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24.10.-s Single photons

Interfacing GHz-bandwidth heralded single photons with a room-temperature Raman quantum memory

Mon, 2014-05-26 23:12 - Josh Nunn
Date: 
2014-05-27
Author(s): 

P. S. Michelberger, T. F. M. Champion, M. R. Sprague, K. T. Kaczmarek, M. Barbieri, X. M. Jin, D. G. England, W. S. Kolthammer, D. J. Saunders, J. Nunn, I. A. Walmsley

Reference: 

quant-ph > arXiv:1405.1470

URL: 

http://arxiv.org/abs/1405.1470

Photonics is a promising platform for quantum technologies. However, photon sources and two-photon gates currently only operate probabilistically. Large-scale photonic processing will therefore be impossible without a multiplexing strategy to actively select successful events.

Homodyne tomography of a single photon retrieved on demand from a cavity-enhanced cold atom memory

Tue, 2013-10-15 16:18 - Michel Brune
Date: 
2013-10-15
Author(s): 

Erwan Bimbard, Rajiv Boddeda, Nicolas Vitrant, Andrey Grankin, Valentina
Parigi,† Jovica Stanojevic, Alexei Ourjoumtsev, and Philippe Grangier

Reference: 

arXiv:1310.1228v1 [quant-ph] 4 Oct 2013

URL: 

http://arxiv.org/abs/1310.1228

We experimentally demonstrate that a non-classical state prepared in an atomic memory can be
efficiently transferred to a single mode of free-propagating light. By retrieving on demand a single
excitation from a cold atomic gas, we realize an efficient source of single photons prepared in a pure,
fully controlled quantum state. We characterize this source using two detection methods, one based
on photon-counting analysis, and the second using homodyne tomography to reconstruct the density

Homodyne tomography of a single photon retrieved on demand from a cavity-enhanced cold atom memory

Tue, 2013-10-15 16:17 - Michel Brune
Date: 
2013-10-15
Author(s): 

Erwan Bimbard, Rajiv Boddeda, Nicolas Vitrant, Andrey Grankin, Valentina
Parigi,† Jovica Stanojevic, Alexei Ourjoumtsev, and Philippe Grangier

Reference: 

arXiv:1310.1228v1 [quant-ph] 4 Oct 2013

URL: 

http://arxiv.org/abs/1310.1228

We experimentally demonstrate that a non-classical state prepared in an atomic memory can be
efficiently transferred to a single mode of free-propagating light. By retrieving on demand a single
excitation from a cold atomic gas, we realize an efficient source of single photons prepared in a pure,
fully controlled quantum state. We characterize this source using two detection methods, one based
on photon-counting analysis, and the second using homodyne tomography to reconstruct the density

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