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Special Issue "Quantum Sensors and Sensing Technology"

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A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Optical Sensors".

Deadline for manuscript submissions: closed (25 September 2023) | Viewed by 1023

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Dr. Ettore Bernardi

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Istituto Nazionale di Ricerca Metrologica, Strada delle Cacce 91, 10135 Turin, Italy
Interests: quantum sensing; NV centers; optical-detected magnetic resonance; quantum thermodynamics; bio-sensing

Special Issue Information

Dear Colleagues,

Quantum sensing is based on taking advantage of quantum features to increase the sensitivity of the measurement of a physical quantity. The quantum features exploited are usually quantum superposition, entanglement, and quantum correlations. The physical quantities measured are electric and magnetic field, temperature, and pressure. In addition, imaging resolution can be enhanced by taking advantage of quantum correlations.

Quantum sensing has rapidly developed in the last few years in the broader context of emerging quantum technologies. Quantum effects, such as entanglement, move from being only theoretical or reserved, to specific challenging experiments intended to be the base of recent technological improvements.

This Special Issue aims to gather research and review articles on recent advances, technologies, solutions, applications, and new challenges in the field of quantum sensing.

Potential topics include, but are not limited to:

Quantum sensing with photons.
Quantum sensing with nitrogen-vacancy centers.
Quantum sensing with flux quits.
Quantum sensing with trapped ions.
Portable sensors.

Dr. Ettore Bernardi
Guest Editor

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Keywords

lab-on-a-chip
quantum superposition
entanglement
quantum correlation
Heisenberg limit
sub-shot noise

Published Papers (3 papers)

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Research

Open AccessCommunication

Attosecond-Level Delay Sensing via Temporal Quantum Erasing

Fabrizio Sgobba

Andrea Andrisani

Stefano Dello Russo

Mario Siciliani de Cumis

and

Luigi Santamaria Amato

Sensors 2023, 23(18), 7758; https://doi.org/10.3390/s23187758 - 08 Sep 2023

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Abstract

Traditional Hong-Ou-Mandel (HOM) interferometry, insensitive to photons phase mismatch, proved to be a rugged single-photon interferometric technique. By introducing a post-beam splitter polarization-dependent delay, it is possible to recover phase-sensitive fringes, obtaining a temporal quantum eraser that maintains the ruggedness of the original HOM with enhanced sensitivity. This setup shows promising applications in biological sensing and optical metrology, where high sensitivity requirements are coupled with the necessity to keep light intensity as low as possible to avoid power-induced degradation. In this paper, we developed a highly sensitive single photon birefringence-induced delay sensor operating in the telecom range (1550 nm). By using a temporal quantum eraser based on common path Hongr-Ou-Mandel Interferometry, we were able to achieve a sensitivity of 4 as for an integration time of

2 \cdot 10^{4}

s. Full article

(This article belongs to the Special Issue Quantum Sensors and Sensing Technology)

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Open AccessCommunication

Microwave Electrometry with Multi-Photon Coherence in Rydberg Atoms

and

Sensors 2023, 23(16), 7269; https://doi.org/10.3390/s23167269 - 19 Aug 2023

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Abstract

A scheme for the measurement of a microwave (MW) electric field is proposed via multi-photon coherence in Rydberg atoms. It is based on the three-photon electromagnetically induced absorption (TPEIA) spectrum. In this process, the multi-photon produces a narrow absorption peak, which has a larger magnitude than the electromagnetically induced transparency (EIT) peak under the same conditions. The TPEIA peak is sensitive to MW fields, and can be used to measure MW electric field strength. We found that the magnitude of TPEIA peaks shows a linear relationship with the MW field strength. The simulation results show that the minimum detectable strength of the MW fields is about 1/10 of that based on an common EIT effect, and the probe sensitivity could be improved by about four times. Furthermore, the MW sensing based on three-photon coherence seems to be robust against the changes in the control field and shows a broad tunability, and the scheme may be useful for designing novel MW sensing devices. Full article

(This article belongs to the Special Issue Quantum Sensors and Sensing Technology)

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Open AccessArticle

Experimental Guesswork with Quantum Side Information Using Twisted Light

Vishal Katariya

Narayan Bhusal

and

Chenglong You

Sensors 2023, 23(14), 6570; https://doi.org/10.3390/s23146570 - 21 Jul 2023

Viewed by 259

Abstract

Guesswork is an information–theoretic quantity which can be seen as an alternate security criterion to entropy. Recent work has established the theoretical framework for guesswork in the presence of quantum side information, which we extend both theoretically and experimentally. We consider guesswork when the side information consists of the BB84 states and their higher-dimensional generalizations. With this side information, we compute the guesswork for two different scenarios for each dimension. We then performed a proof-of-principle experiment using Laguerre–Gauss modes to experimentally compute the guesswork for higher-dimensional generalizations of the BB84 states. We find that our experimental results agree closely with our theoretical predictions. This work shows that guesswork can be a viable security criterion in cryptographic tasks and is experimentally accessible in a number of optical setups. Full article

(This article belongs to the Special Issue Quantum Sensors and Sensing Technology)

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