Overcoming decoherence in the collapse and revival of spin Schr\"odinger cats

TL;DR

This paper investigates how increasing the number of spins in a quantum system can reduce the impact of field decoherence on the collapse and revival of spin Schr"odinger cats, with implications for quantum metrology.

Contribution

It demonstrates that adding more spins mitigates field decoherence effects in spin Schr"odinger cat systems, enhancing their robustness for quantum applications.

Findings

Increasing spins reduces decoherence effects

Mitigation improves quantum state stability

Potential benefits for quantum metrology

Abstract

In addition to being a very interesting quantum phenomenon, Schr\"odinger 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 Schr\"odinger cat, which could be of significant utility in quantum metrology and other quantum processing.