Quantum Sensing of Noisy and Complex Systems under Dynamical Control

Kurizki, Gershon; Álvarez, Gonzalo; Zwick, Analia

doi:10.3390/technologies5010001

Cited by 9 publications

(6 citation statements)

References 90 publications

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“…Further significance of quantum coherent information fuel molecules can be expected in quantum sensing and metrology [197][198][199][200][201]. Using QHEs for thermometry [202] and magnetometry [203] has been proposed.…”

Section: Resultsmentioning

confidence: 99%

Quantum thermodynamics and quantum coherence engines

Tuncer

Müstecaplıoğlu²

2020

Turk J Phys

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The advantages of quantum effects in several technologies, such as computation and communication, have already been well appreciated. Some devices, such as quantum computers and communication links, exhibiting superiority to their classical counterparts, have been demonstrated. The close relationship between information and energy motivates us to explore if similar quantum benefits can be found in energy technologies. Investigation of performance limits for a broader class of information-energy machines is the subject of the rapidly emerging field of quantum thermodynamics. Extension of classical thermodynamical laws to the quantum realm is far from trivial. This short review presents some of the recent efforts in this fundamental direction. It focuses on quantum heat engines and their efficiency bounds when harnessing energy from nonthermal resources, specifically those containing quantum coherence and correlations.

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Section: Resultsmentioning

confidence: 99%

Quantum thermodynamics and quantum coherence engines

Tuncer

Müstecaplıoğlu²

2020

Turk J Phys

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“…The recent experimental advances in the control of systems at the microscopic level enabled fascinating progress in quantum technologies [1][2][3][4]. This has, in turn, sparked rigorous theoretical [5][6][7][8] and experimental [9][10][11] progress in the field of quantum metrology, with the aim of developing sensors capable of probing systems in the quantum regime with high accuracy [12][13][14][15]; such accuracy is essential throughout different branches of physics, including quantum information processing [16][17][18][19], quantum optics [20,21] and condensed matter physics [22][23][24][25]. One of the major challenges in quantum metrology is the precise estimation of small parameters [5,26].…”

Section: Introductionmentioning

confidence: 99%

Quantum magnetometry using two-stroke thermal machines

et al. 2020

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The precise estimation of small parameters is a challenging problem in quantum metrology. Here, we introduce a protocol for accurately measuring weak magnetic fields using a two-level magnetometer, which is coupled to two (hot and cold) thermal baths and operated as a two-stroke quantum thermal machine. Its working substance consists of a two-level system (TLS), generated by an unknown weak magnetic field acting on a qubit, and a second TLS arising due to the application of a known strong and tunable field on another qubit. Depending on this field, the machine may either act as an engine or a refrigerator. Under feasible conditions, determining this transition point allows to reduce the relative error of the measurement of the weak unknown magnetic field by the ratio of the temperatures of the colder bath to the hotter bath.

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“…Apart from functioning as toy models of quantum heat engines and refrigerators, simple quantum systems, such as a qubit (TLS) or a harmonic oscillator, when connected to baths, have also found applications as efficient 'quantum probes' in the field of quantum metrology [40][41][42][43][44]. The idea is to make indirect measurements on the system which in some cases can be more precise than a direct measurement of the small parameter to be estimated.…”

Section: Introductionmentioning

confidence: 99%

Exploring the role of asymmetric-pulse modulation in quantum thermal machines and quantum thermometry

Mondal,

Bhattacharjee,

Dutta

2020

Preprint

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We explore the advantages of using an asymmetric pulse modulation on a two-level system (TLS) coupled to one or more thermal baths in the context of quantum thermal machines and thermometry. For a thermal machine constructed by coupling the TLS to two thermal baths, we demonstrate that the asymmetric pulse provides an extra degree of control over the mode of operation of the thermal machine. Further, we also show that an asymmetric pulse may provide superior optimality in a recently proposed protocol for quantum thermometry, where dynamical control has been shown to enhance the precision of measurement.

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Quantum Sensing of Noisy and Complex Systems under Dynamical Control

Cited by 9 publications

References 90 publications

Quantum thermodynamics and quantum coherence engines

Quantum thermodynamics and quantum coherence engines

Quantum magnetometry using two-stroke thermal machines

Exploring the role of asymmetric-pulse modulation in quantum thermal machines and quantum thermometry

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