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Volume 14: Pages 82-90, 2001

Quantum‐Mechanical P Function for Photons

A. S. Daoud

Zagazig University, Faculty of Sciences, Department of Mathematics, Zagazig, Egypt

In this paper, we have introduced a process that has furnished a novel weight function. This function relates to the Glauber‐Sudarshan P distribution function for chaotic fields through a nonlinear relation. It is found that the new function is available to define the P representation for the squeezed states that are pure quantum‐mechanical states of photons. A nondiagonal form for the density operator for a single‐mode squeezed vacuum is exhibited. This form leads to interesting new concepts concerning the structure of the density matrix for photons.

Keywords: quantum‐mechanical P function, quantum weight function for photons, quantum weighting factors for photons, P function for quantum states, quantum‐mechanical weight function for photons, P representation for quantum‐mechanical state, superposed

Received: xxxxxxxxxxPublished online: December 15, 2008