Evidence map›Paper›PMID 40301346›Full record

ArticleNature communications2025

Beating the Ramsey limit on sensing with deterministic qubit control.

M O Hecht, Kumar Saurav, Evangelos Vlachos, Daniel A Lidar, Eli M Levenson-Falk

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In one paragraph

Article in Nature communications, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

M O HechtCenter for Quantum Information Science and Technology, University of Southern California, Los Angeles, CA, 90089, USA.
Kumar SauravCenter for Quantum Information Science and Technology, University of Southern California, Los Angeles, CA, 90089, USA.
Evangelos VlachosCenter for Quantum Information Science and Technology, University of Southern California, Los Angeles, CA, 90089, USA.ORCID http://orcid.org/0000-0003-1697-3491
Daniel A LidarCenter for Quantum Information Science and Technology, University of Southern California, Los Angeles, CA, 90089, USA.ORCID http://orcid.org/0000-0002-1671-1515
Eli M Levenson-FalkCenter for Quantum Information Science and Technology, University of Southern California, Los Angeles, CA, 90089, USA. elevenso@usc.edu.ORCID http://orcid.org/0000-0002-0019-9465

Funding

National Science Foundation (NSF) OMA-1936388Research Corporation for Science Advancement (Research Corporation) 27550United States Department of Defense | United States Army | U.S. Army Research, Development and Engineering Command | Army Research Office (ARO) W911NF-22-S-0007United States Department of Defense | United States Navy | Office of Naval Research (ONR) N00014-21-1-2688
6 · The paper itself

Abstract

Qubit frequency shifts, which often contain information about a target environment variable, are detected with Ramsey interference measurements. Unfortunately, the sensitivity of this protocol is limited by decoherence. We introduce a new protocol to enhance the sensitivity of a qubit frequency measurement in the presence of decoherence by applying a continuous drive to stabilize one component of the Bloch vector. We demonstrate our protocol on a superconducting qubit, enhancing sensitivity per measurement shot by 1.65 × and sensitivity per qubit evolution time by 1.09 × compared to Ramsey. We also explore the protocol theoretically, finding unconditional enhancements compared to Ramsey interferometry and maximum enhancements of 1.96 × and 1.18 × , respectively. Additionally, our protocol is robust to parameter miscalibrations. It requires no feedback and no extra control or measurement resources, and can be immediately applied in a wide variety of quantum computing and quantum sensor technologies.

Identifiers

PMID40301346
PMCPMC12041591

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.