Quantum-Enhanced Picostrain Sensing with Superconducting Qubits

TL;DR

This paper introduces a quantum-enhanced picostrain sensor utilizing superconducting qubits, achieving Heisenberg-limited sensitivity and surpassing classical sensors by two orders of magnitude, with potential for nanoscale material analysis.

Contribution

It presents a novel quantum sensing protocol that combines superconducting qubits and entanglement to achieve ultra-sensitive strain measurements at the picostrain level.

Findings

Achieves picostrain sensitivity two orders of magnitude better than classical sensors.

Uses multipartite entanglement of qubits for enhanced measurement precision.

Integrates seamlessly with superconducting processors for in-situ diagnostics.

Abstract

We propose a quantum-enhanced picostrain sensor that achieves Heisenberg-limited strain sensing using superconducting qubits. A strain-sensitive qubit s Hamiltonian is coupled to the momentum quadrature of a microwave resonator, transducing mechanical strain $\epsilon$ into amplified spatial displacements of the resonator s phase space. Using homodyne detection of the resonator field and multipartite entanglement of N qubits, the protocol achieves a strain sensitivity $\Delta\epsilon \sim p\epsilon$ (picostrain), two orders of magnitude better than classical sensors. The scheme integrates natively with superconducting processors, enabling in-situ diagnostic and nanoscale material characterization.