Overcoming decoherence in the collapse and revival of spin Schrödinger cats

Abstract

In addition to being a very interesting quantum phenomenon, Schrödinger cat swapping has the potential for application in the preparation of quantum states that could be used in metrology and other quantum processing. We study in detail the effects of field decoherence on a cat-swapping system comprising a set of identical qubits, or spins, all coupled to a field mode. We demonstrate that increasing the number of spins actually mitigates the effects of field decoherence on the collapse and revival of a spin Schrödinger cat, which could be of significant utility in quantum metrology and other quantum processing.

4 pages, 2 figures

References in corpus (4)

• The Dicke Quantum Phase Transition with a Superfluid Gas in an Optical Cavity
• The quantum-classical crossover of a field mode
• Dynamics of Entanglement and `Attractor' states in The Tavis-Cummings Model
• Entanglement of superconducting charge qubits by homodyne measurement

Cited by in corpus (5)

• Quantum phase space measurement and entanglement validation made easy
• Overview of the phase space formulation of quantum mechanics with application to quantum technologies
• Towards a complete, continuous, Wigner function for an ensemble of spins or qubits
• Visualization of correlations in hybrid quantum systems
• Photon echoes for a system of large negative spin and few photons