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Squeezing operations in Fock space and beyond

Author

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  • Honegger, Reinhard
  • Rieckers, Alfred

Abstract

Combining the signal and the idler modes we show that each nondegenerate squeezing quadratic Hamiltonian may be transformed into the form of a degenerate squeezing Hamiltonian, if one uses the smeared field formalism. For the case of infinitely many photon modes we discuss the existence of squeezing quadratic Hamiltonians in Fock space. This gives a limitation on the squeezing parameters, which guarantees that all squeezed vacua are representable as vectors in Fock space. If this condition is not satisfied (the case of strong squeezing) then all squeezed vacua are outside the Fock space and mutually inequivalent.

Suggested Citation

  • Honegger, Reinhard & Rieckers, Alfred, 1997. "Squeezing operations in Fock space and beyond," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 242(3), pages 423-438.
    • Handle: RePEc:eee:phsmap:v:242:y:1997:i:3:p:423-438
    DOI: 10.1016/S0378-4371(97)00181-7
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