Von Neumann entropy in a dispersive cavity

Abstract

We study the von Neumann entropy of the partial trace of a system of two two-level atoms (qubits) in a dispersive cavity where the atoms are interacting collectively with a single mode electromagnetic field in the cavity. We make a contrast of this entanglement entropy with the spin squeezing property of the system. We find a close relationship between this von Neumann entropy and the spin squeezing of the system. We observe that this entanglement entropy attains its maximum value when the spin squeezing in the system goes to its maximum and is zero when the spin squeezing in the system vanishes.

arXiv comment3 figures

References in corpus (11)

• Entanglement of Formation of an Arbitrary State of Two Qubits
• Strong-driving-assisted multipartite entanglement in cavity QED
• Probing quantum phases of ultracold atoms in optical lattices by transmission spectra in cavity QED
• Cavity QED with separate photon storage and qubit readout modes
• Proposal for manipulating and detecting spin and orbital states of trapped electrons on helium using cavity quantum electrodynamics
• Non-linear dispersive regime of cavity QED: The dressed dephasing model
• Sign-changing photon-mediated atom interactions in multimode cavity QED
• The Super-Strong Coupling Regime of Cavity Quantum Electrodynamics
• Quantum state reconstruction in the presence of dissipation
• Degree of entanglement for two qubits
• Entropy operator and associated Wigner function