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.
|Titolo:||Manipulating Frequency-Bin Entangled States in Cold Atoms|
|Data di pubblicazione:||2014|
|Parole Chiave:||frequency bin entanglement; single photon; electromagnetically induced transparency; quantum information|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1038/srep03941|
|Appare nelle tipologie:||1.1 Articolo in rivista|