Macroscopic superposition and entanglement for displaced thermal fields induced by a single atom

Abstract

We show that a cavity field can evolve from an initial displaced mixed thermal state to a macroscopic superpositions of displaced thermal states via resonant interaction with a two-level atom. As a macroscopic system (meter) is really in a mixed state before coupling with the microscopic system at some temperature, our result is important for studying the quantum measurement problem and decoherence under real conditions. For the two-mode case, entanglement of displaced thermal states between the modes can be obtained.

References in corpus (4)

• Strong-driving-assisted multipartite entanglement in cavity QED
• Entanglement of a Mesoscopic Field with an Atom induced by Photon Graininess in a Cavity
• Transfer of Nonclassical Properties from A Microscopic Superposition to Macroscopic Thermal States in The High Temperature Limit
• Measuring irreversible dynamics of a quantum harmonic oscillator

Cited by in corpus (5)

• Control of two-atom entanglement with two thermal fields in coupled cavities
• Hot Schrödinger Cat States
• Mixing thermal coherent states for precision and range enhancement in quantum thermometry
• Qubit Mediated Time Robust Entangling of Oscillators in Thermal Environments
• Classicalization of Quantum State of Detector by Amplification Process