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Enhancing entanglement of entangled coherent states via a f-deformed photon-addition operation

  • B. MojaveriEmail author
  • A. Dehghani
  • R. Jafarzadeh Bahrbeig
Regular Article
  • 17 Downloads

Abstract.

In this paper, we introduce a new kind of photon-added entangled coherent states (PA-ECSs), by performing repeatedly a f-deformed photon-addition (DPA) operation, \( A^{\dagger}= f(\hat{n}) a^{\dagger}\), on each mode of the entangled coherent states (ECSs), \( \vert\Psi_{\pm}(\alpha)\rangle\). By choosing a particular deformation function \( f(\hat{n})\), we study how the entanglement properties can be enhanced by DPA operation. As a result, we show that both the single and two-mode DPA operation can be used to improve the entanglement of \( \vert\Psi_{+} (\alpha)\rangle\), where the effects of improvement by two-mode DPA operation are more prominent than those by single-mode DPA operation, in any amplitude regime. Moreover, our results show there exists a family of coherent amplitudes \(| \alpha |\) such that the two-mode DPA operation preserves the maximal entanglement of the odd ECSs \( \vert\Psi_{-}(\alpha)\rangle\), where the non-deformed photon-addition operation \( a^{\dagger}\) suppresses the entanglement amount. Finally, a theoretical scheme for the physical generation of the introduced states based on a Jaynes-Cummings model with intensity-dependent couplings is proposed.

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Copyright information

© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • B. Mojaveri
    • 1
    Email author
  • A. Dehghani
    • 2
  • R. Jafarzadeh Bahrbeig
    • 1
  1. 1.Department of PhysicsAzarbaijan Shahid Madani UniversityTabrizIran
  2. 2.Department of PhysicsPayame Noor UniversityTehranIran

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