Comment on "Probing Noise in Flux Qubits via Macroscopic Resonant Tunneling" (arXiv:0712.0838)

TL;DR

This paper critically examines the assumptions of macroscopic quantum tunneling and superposition in flux qubits, highlighting potential contradictions with fundamental physical laws like angular momentum conservation.

Contribution

It provides a critical commentary questioning the validity of common quantum mechanical assumptions applied to flux qubits.

Findings

Highlights contradictions with angular momentum conservation

Questions the validity of superposition in flux qubits

Stimulates debate on quantum formalism applicability

Abstract

Expert attention is attracted to the obvious contradiction of the assumption on macroscopic quantum tunnelling and on superposition of two macroscopically distinct quantum states of superconducting loop, considered as flux qubit, with the law of angular momentum conservation and the universally recognized quantum formalism.