Scientific Results

Manipulating Frequency-Bin Entangled States in Cold Atoms

Year: 2014

Authors: Zavatta A., Artoni M., Viscor D., La Rocca G.

Autors Affiliation: Istituto Nazionale di Ottica (INO-CNR), Firenze, Italy;
European Laboratory for Nonlinear Spectroscopy, Firenze, Italy;
Department of Engineering and Information Technology, Brescia University, Brescia, Italy;
Departament de Fisica, Universitat Autonoma de Barcelona, E-08193 Bellaterra, Spain;
Scuola Normale Superiore and CNISM, Pisa, Italy

Abstract: Optical manipulation of entanglement harnessing the frequency degree of freedom is important for encoding of quantum information. We here devise a phase-resonant excitation mechanism of an atomic interface where full control of a narrowband single-photon two-mode frequency entangled state can be efficiently achieved. We illustrate the working physical mechanism for an interface made of cold Rb-87 atoms where entanglement is well preserved from degradation over a typical 100 mu m length scale of the interface and with fractional delays of the order of unity. The scheme provides a basis for efficient multi-frequency and multi-photon entanglement, which is not easily accessible to polarization and spatial encoding.

Journal/Review: SCIENTIFIC REPORTS

Volume: 4      Pages from: 3941  to: 3941

More Information: The work is supported by the EU through the \”Malicia\” project (FET – Open grant number: 265522 – 7th Framework Programme), the \”Qscale\’\’ project (ERA – NET CHIST – ERA) and the ERC Advanced Grant DISQUA, by the Italian-Spanish governments through the MIUR Azione Integrata (grant IT09L244H5), by the Fondo di Ateneo of Brescia University and by the Catalan Government under the contract SGR2009-00347.
KeyWords: quantum optics; entanglement; cold atoms; single-photon; quantum
DOI: 10.1038/srep03941

Citations: 7
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