Von Neumann entropy in a dispersive cavity

Abstract

We study the von Neumann entropy of the partial trace of a system of 2 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.

Keywords:

• Von Neumann entropy
• two-level atom
• dispersive cavity

Disclosure statement

No potential conflict of interest was reported by the author(s).