Single-atom entropy squeezing for two two-level atoms interacting with a single-mode radiation field
arXiv:quant-ph/0703075 · doi:10.1016/j.optcom.2008.01.051
Abstract
In this paper we consider a system of two two-level atoms interacting with a single-mode quantized electromagnetic field in a lossless resonant cavity via -photon-transition mechanism. The field and the atoms are initially prepared in the coherent state and the excited atomic states, respectively. For this system we investigate the entropy squeezing, the atomic variances, the von Neumann entropy and the atomic inversions for the single-atom case. We show that the more the number of the parties in the system the less the amounts of the nonclassical effects exhibited in the entropy squeezing. The entropy squeezing can give information on the corresponding von Neumann entropy. Also the nonclassical effects obtained form the asymmetric atoms are greater than those obtained form the symmetric atoms. Finally, the entropy squeezing gives better information than the atomic variances only for the asymmetric atoms.
15 pages, 4 figures, comments are most welcome
References in corpus (23)
- Entanglement of Formation of an Arbitrary State of Two Qubits
- Entanglement of a Pair of Quantum Bits
- Many-particle entanglement with Bose--Einstein condensates
- Universal state inversion and concurrence in arbitrary dimensions
- Quantum cryptography with squeezed states
- Distributed quantum computation via optical fibres
- Entanglement induced by a single-mode heat environment
- Spin-spin interaction and spin-squeezing in an optical lattice
- Vacuum-Stimulated Raman Scattering based on Adiabatic Passage in a High-Finesse Optical Cavity
- Quantum teleportation with squeezed vacuum states
- Entanglement Sharing in the Two-Atom Tavis-Cummings Model
- Temporal and diffraction effects in entanglement creation in an optical cavity
- Correlated motion of two atoms trapped in a single mode cavity field
- The Mach-Zehnder and the Teleporter
- Ultrafast deterministic generation of entanglement in a time-dependent asymmetric two-qubit-cavity system
- Spin squeezing via atom - cavity field coupling
- On the evolution of superposition of squeezed displaced number states with the multiphoton Jaynes-Cummings model
- Spin squeezing as a measure of entanglement in a two qubit system
- Perspectives for a mixed two-qubit system with binomial quantum states
- Quantum phase properties of two-mode Jaynes-Cummings model for Schrödinger-cat states: interference and entanglement
- Evolution of the superposition of displaced number states with the two-atom multiphoton Jaynes-Cummings model: interference and entanglement
- Nonclassical effects in cold trapped ions inside a cavity
- Generation of maximally entangled mixed states of two atoms via on-resonance asymmetric atom-cavity couplings