Remarks on the violation of Bell's inequality in Josephson phase qubits

TL;DR

This paper critically examines the reported violation of Bell's inequality in Josephson phase qubits, highlighting potential issues in the data and suggesting that the claimed quantum violation may still be contestable.

Contribution

It provides a detailed analysis of the data and methodology, questioning the robustness of the Bell inequality violation claim in Josephson phase qubits.

Findings

The Bell signal deviation from classical limits may be challenged.

Error estimation and data consistency are critically examined.

The claimed violation might not be conclusively established.

Abstract

The consistency test and error estimation for the data concerning recently reported violation of Bell inequality for Josephson phase qubits are presented in details. It is pointed out that the deviation of the Bell signal from the classical limit might still be challenged.