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Quantum Optics by Girish S. Agarwal

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4

Non-Gaussian nonclassical states

Most nonclassical states that we discussed in Chapters 2 and 3 are Gaussian in the sense that the Wigner function for such states was Gaussian. The only exception to the Gaussian states is the n photon Fock state for which the Wigner function is non-Gaussian and negative for certain domains in the phase space. In this chapter we introduce many other classes of nonclassical states which typically are non-Gaussian.

4.1   Schrödinger cat state and the cat paradox

 

 

Schrödinger, in 1935, proposed a thought experiment which shows how quantum-mechanical description can be in contradiction to our everyday experience [1]. He considered a closed box containing a cat, which is a macroscopic object, and a radioactive ...

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