Test of weak measurement on a two- or three-qubit computer

TL;DR

This paper demonstrates how to test weak measurement anomalies and properties using a small quantum computer with two or three qubits, providing insights into weak values as effective field strengths.

Contribution

It introduces a method to test weak value anomalies and their properties on minimal quantum computers, offering a practical approach for experimental validation.

Findings

Successful demonstration of weak value anomaly testing

Verification of consistency and simultaneity of weak values

Interpretation of weak value as an effective field strength

Abstract

Current quantum computer technology is sufficient to realize weak measurements and the corresponding concept of weak values. We demonstrate how the weak value anomaly can be tested, along with consistency and simultaneity of weak values, using only discrete degrees of freedom. All you need is a quantum computer with two--or better, three--qubits. We also give an interpretation of the weak value as an effective field strength in a postselected spin measurement.