Continuous source of phase-controlled entangled two-photon laser

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We show that an absolute coherent phase of a laser can be used to manipulate the entanglement of photon pairs in two-photon laser. We present simple physics behind a general master equation for two-photon laser. Our focus is on the generation of a continuous source of macroscopically entangled photon pairs in the double Lambda (or Raman) scheme. We show how the steady-state photon numbers and entanglement depend on the laser parameters, especially the phase. We obtain a relationship between entanglement and two-photon correlation. We derive conditions that give steady-state entanglement for the spontaneous Raman-electromagnetic-induced transparency scheme and use it to identify the region with macroscopic entanglement. No entanglement is found for the double resonant Raman scheme.
Publisher
AMER PHYSICAL SOC
Issue Date
2007
Language
English
Article Type
Article
Keywords

CONTINUOUS VARIABLE SYSTEMS; LITHOGRAPHY; CRITERION

Citation

PHYSICAL REVIEW A, v.76, no.1

ISSN
1050-2947
DOI
10.1103/PhysRevA.76.013809
URI
http://hdl.handle.net/10203/87192
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