Work

Quantum Speed Limit in Quantum Sensing

Year: 2024

Type: article

Abstract: Quantum sensors capitalize on advanced control sequences for maximizing sensitivity and precision. However, protocols are not usually optimized for temporal resolution. Here, we establish the limits for time-resolved sensing of dynamical signals using qubit probes. We show that the best possible time resolution is closely related to the quantum speed limit (QSL), which describes the minimum time needed to transform between basis states. We further show that a composite control sequence consisting of two phase-shifted pulses reaches the QSL. Practical implementation is discussed based on the example of the spin-1 qutrit of a nitrogen-vacancy center in diamond.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.133.210802

Authors: K. Herb, C. L. Degen

Institution: ETH Zurich

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, European Research Council

Awards: G1748083905, Nanoscale imaging of domain wall structure and dynamics: Ferrimagnets, antiferromagnets, and multiferroics, G5599649393, G628552264