Anomalous lack of decoherence of the Macroscopic Quantum Superpositions based on phase-covariant Quantum Cloning

TL;DR

This paper demonstrates that Macroscopic Quantum Superpositions created via phase-covariant quantum cloning exhibit exceptional resistance to decoherence, supporting experimental findings and suggesting potential for decoherence-free quantum information structures.

Contribution

It reveals the anomalous decoherence resistance of MQS based on phase-covariant cloning, offering insights for quantum computing and decoherence mitigation.

Findings

MQS based on phase-covariant cloning are highly resilient to decoherence

Supports recent experimental results on MQS stability

Suggests potential for decoherence-free quantum information structures

Abstract

We show that all Macroscopic Quantum Superpositions (MQS) based on phase-covariant quantum cloning are characterized by an anomalous high resilence to the de-coherence processes. The analysis supports the results of recent MQS experiments and leads to conceive a useful conjecture regarding the realization of complex decoherence - free structures for quantum information, such as the quantum computer.