Monitoring atom-atom entanglement and decoherence in a solvable tripartite open system in cavity QED

Abstract

We present a fully analytical solution of the dynamics of two strongly-driven atoms resonantly coupled to a dissipative cavity field mode. We show that an initial atom-atom entanglement cannot be increased. In fact, the atomic Hilbert space divides into two subspaces, one of which is decoherence free so that the initial atomic entanglement remains available for applications, even in presence of a low enough atomic decay rate. In the other subspace a measure of entanglement, decoherence, and also purity, are described by a similar functional behavior that can be monitored by joint atomic measurements. Furthermore, we show the possible generation of Schrödinger-cat-like states for the whole system in the transient regime, as well as of entanglement for the cavity field and the atom-atom subsystems conditioned by measurements on the complementary subsystem.

arXiv comment11 pages, 9 figures, submitted to Physical Review A

References in corpus (15)

• Mixed State Entanglement and Quantum Error Correction
• Decoherence, einselection, and the quantum origins of the classical
• Cavity quantum electrodynamics for superconducting electrical circuits: an architecture for quantum computation
• Entanglement of a Pair of Quantum Bits
• Noiseless Quantum Codes
• Preserving coherence in quantum computation by pairing quantum bits
• Strong-driving-assisted multipartite entanglement in cavity QED
• Entanglement induced by a single-mode heat environment
• Coupling a single atomic quantum bit to a high finesse optical cavity
• Cooling to the Ground State of Axial Motion for One Atom Strongly Coupled to an Optical Cavity
• Vacuum-stimulated cooling of single atoms in three dimensions
• Deterministic loading of individual atoms to a high-finesse optical cavity
• Mesoscopic superpositions of vibronic collective states of N trapped ions
• Generation and purification of maximally-entangled atomic states in optical cavities
• Solvable model of a strongly-driven micromaser

Cited by in corpus (12)

• Charger-mediated energy transfer for quantum batteries: an open system approach
• Dicke model and environment-induced entanglement in ion-cavity QED
• High-fidelity entanglement purification using chains of atoms and optical cavities
• The coherent interaction between matter and radiation - A tutorial on the Jaynes-Cummings model
• Exact results on decoherence and entanglement in a system of N driven atoms and a dissipative cavity mode
• Periodic revival of entanglement of two strongly driven qubits in a dissipative cavity
• Quantum entanglement generation on magnons assisted with microwave cavities coupled to a superconducting qubit
• Entanglement dynamics and decoherence of an atom coupled to a dissipative cavity field
• Optimal entanglement generation in cavity QED with dissipation
• Entanglement generation in the ultra-strongly coupled Rabi model
• Optomechanical Entanglement between an Ion and an Optical Cavity Field
• Tripartite entanglement dynamics in a system of strongly driven qubits