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Photon entanglement in the phase-space Q representation of quantum optics |
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| Authors: | E Santos |
| Institution: | (1) Departamento de Fısica, Universidad de Cantabria, Santander, Spain, ES |
| Abstract: | Several examples of photon entanglement are studied in the Q representation of quantum optics. In particular, the entangled states produced in parametric downconversion are studied in detail, and we determine the conditions for the violation of Bell's inequality. Our approach shows that photon entanglement is related to the existence of correlations between the quantum fluctuations of the electromagnetic field associated to different modes. Received 10 August 2002 / Received in final form 7 November 2002 Published online 4 February 2003 |
| Keywords: | PACS 03 65 Ud Entanglement and quantum nonlocality (e g EPR paradox Bell's inequalities GHZ states etc ) – 42 50 Dv Nonclassical field states squeezed antibunched and sub-Poissonian states operational definitions of the phase of the field phase measurements – 42 50 Lc Quantum fluctuations quantum noise and quantum jumps |
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