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Quantum metrology with boundary time crystals

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V. Montenegro, M. G. Genoni, A. Bayat, M. G. A. Paris

Quantum Physics · Submitted 5 Jan 2023

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim Our scheme is indeed a demonstration of harnessing decoherence for achieving quantum-enhanced sensitivity.

how it is stated · asserted 1.00 read the record →

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arXiv ID2301.02103 (version 2)
Pith IDDMH2ENLJ, Pith's permanent record of this paper and its review
CitationA. Bayat, M. G. A. Paris, M. G. Genoni, V. Montenegro. "Quantum metrology with boundary time crystals." arXiv:2301.02103 (2023). https://pith.science/paper/DMH2ENLJ
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The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 6,787 input tokens.

What the abstract itself states, as probabilities: claims first 0.05 · states limitation 0.13 · human participants 0.01 · controlled comparison 0.10 · randomized assignment 0.01 · states quantitative result 0.19 · compares with prior results 0.14 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v2. Results and the main claim are underlined; .

Quantum sensing is one of the arenas that exemplifies the superiority of quantum technologies over their classical counterparts. Such superiority, however, can be diminished due to unavoidable noise and decoherence of the probe. Thus, metrological strategies to fight against or profit from decoherence are highly desirable. This is the case of certain types of decoherence-driven many-body systems supporting dissipative phase transitions, which might be helpful for sensing. Boundary time crystals are exotic dissipative phases of matter in which the time-translational symmetry is broken, and long-lasting oscillations emerge in open quantum systems at the thermodynamic limit. We show that the transition from a symmetry unbroken into a boundary time crystal phase, described by a second-order transition, reveals quantum-enhanced sensitivity quantified through quantum Fisher information. We also determine the critical exponents of the system and establish their relationship. Our scheme is indeed a demonstration of harnessing decoherence for achieving quantum-enhanced sensitivity. From a practical perspective, it has the advantage of being independent of initialization and can be captured by a simple measurement.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 Quantum sensing is one of the arenas that exemplifies the superiority of quantum technologies over their classical counterparts. background 1.00 0.04 0.02 asserted 1.00
s1 Such superiority, however, can be diminished due to unavoidable noise and decoherence of the probe. background 0.96 0.04 0.02 asserted 0.87
s2 Thus, metrological strategies to fight against or profit from decoherence are highly desirable. background 0.95 0.04 0.04 asserted 0.87
s3 This is the case of certain types of decoherence-driven many-body systems supporting dissipative phase transitions, which might be helpful for sensing. background 1.00 0.06 0.04 speculative 0.57
s4 Boundary time crystals are exotic dissipative phases of matter in which the time-translational symmetry is broken, and long-lasting oscillations emerge in open quantum systems at the thermodynamic limit. background 0.98 0.06 0.04 asserted 1.00
s5 We show that the transition from a symmetry unbroken into a boundary time crystal phase, described by a second-order transition, reveals quantum-enhanced sensitivity quantified through quantum Fisher information. result 0.95 0.95 0.79 asserted 1.00
s6 We also determine the critical exponents of the system and establish their relationship. result 0.67 0.95 0.06 asserted 0.99
s7 Our scheme is indeed a demonstration of harnessing decoherence for achieving quantum-enhanced sensitivity. interpretation 0.97 0.83 0.59 asserted 1.00
s8 From a practical perspective, it has the advantage of being independent of initialization and can be captured by a simple measurement. interpretation 0.42 0.72 0.08 asserted 0.99

What kind of paper the classifier reports this is: theoretical result 0.79 · evidence from proof or derivation 0.75.

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  • figures and tables
  • references and citing sentences
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  • C citations
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Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

Quantum sensing is one of the arenas that exemplifies the superiority of quantum technologies over their classical counterparts. Such superiority, however, can be diminished due to unavoidable noise and decoherence of the probe. Thus, metrological strategies to fight against or profit from decoherence are highly desirable. This is the case of certain types of decoherence-driven many-body systems supporting dissipative phase transitions, which might be helpful for sensing. Boundary time crystals are exotic dissipative phases of matter in which the time-translational symmetry is broken, and long-lasting oscillations emerge in open quantum systems at the thermodynamic limit. We show that the transition from a symmetry unbroken into a boundary time crystal phase, described by a second-order transition, reveals quantum-enhanced sensitivity quantified through quantum Fisher information. We also determine the critical exponents of the system and establish their relationship. Our scheme is indeed a demonstration of harnessing decoherence for achieving quantum-enhanced sensitivity. From a practical perspective, it has the advantage of being independent of initialization and can be captured by a simple measurement.

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9 arXiv papers cite this in 16 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 13 sentences without a confident label

Cites it as background 3 papers

What it cites · 5 sentences without a confident label

Cites as background 2 papers
  • Mean-field analysis of this BTC phase transition has been also put forward [ref] , the possibility of distinguishing the two phases via continuous monitoring [ref] , and the study of the many-body quantum correlations building up in the two phases [ref] .

    Quantum trajectories of dissipative time-crystals · Introduction · 0.92

  • Mean-field analysis of this BTC phase transition has been also put forward [ref] , the possibility of distinguishing the two phases via continuous monitoring [ref] , and the study of the many-body quantum correlations building up in the two phases [ref] .

    Continuous sensing and parameter estimation with the boundary time-crystal · Introduction · 0.92

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