Optimal quantum phase estimation with generalized multi-component Schrödinger cat states

Lee, Seung-Woo; Lee, Suyong; Kim, Jaewan

doi:10.1364/josab.393200

Cited by 10 publications

(4 citation statements)

References 33 publications

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“…In particular, SNSPD image sensors have recently been demonstrated (45,46), which, while currently having some limitations, could, in the future, be used for the required high-efficiency coincidence image detection. Last, future work will also focus on modifying our method to achieve enhanced phase imaging using other quantum states that have less demanding optical efficiency requirements than N00N states (47)(48)(49)(50)(51). We are therefore optimistic that the technological requirements for our method to yield a true quantum advantage over classical phase measurements will soon be met.…”

Section: Discussionmentioning

confidence: 99%

A quantum-enhanced wide-field phase imager

et al. 2021

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Section: Discussionmentioning

confidence: 99%

A quantum-enhanced wide-field phase imager

et al. 2021

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“…Interferometric phase sensing has been studied with various quantum states and measurements that beat the SQL and achieve the HL, including the twin-Fock state | N ⟩| N ⟩ incident into a MZI, the photon-number correlated state, ,− the TMSV state with parity detection, Schrödinger’s cat states, and multiheaded coherent states. , More details of these states and their performance can be found in ref .…”

Section: Quantum Sensorsmentioning

confidence: 99%

Quantum Plasmonic Sensors

et al. 2021

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The extraordinary sensitivity of plasmonic sensors is well known in the optics and photonics community. These sensors exploit simultaneously the enhancement and the localization of electromagnetic fields close to the interface between a metal and a dielectric. This enables, for example, the design of integrated biochemical sensors at scales far below the diffraction limit. Despite their practical realization and successful commercialization, the sensitivity and associated precision of plasmonic sensors are starting to reach their fundamental classical limit given by quantum fluctuations of light -known as the shot-noise limit. To improve the sensing performance of these sensors beyond the classical limit, quantum resources are increasingly being employed. This area of research has become known as 'quantum plasmonic sensing' and it has experienced substantial activity in recent years for applications in chemical and biological sensing. This review aims to cover both plasmonic and quantum techniques for sensing, and shows how they have been merged to enhance the performance of plasmonic sensors beyond traditional methods. We discuss the general framework developed for quantum plasmonic sensing in recent years, covering the basic theory behind the advancements made, and describe the important works that made these advancements. We also describe several key works in detail, highlighting their motivation, the working principles behind them, and their future impact. The intention of the review is to set a foundation for a burgeoning field of research that is currently being explored out of intellectual curiosity and for a wide range of practical applications in biochemistry, medicine, and pharmaceutical research.

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“…This result explicitly shows that the non-Gaussian entanglement is indeed more resilient to local Gaussian noises as compared to Gaussian states. Non-Gaussian entanglement can be useful not only in the entanglement distribution but also in other tasks, for example, the multi-component cat states were shown to outperform two-mode squeezed vacuum states in phase estimation [42].…”

Section: Introductionmentioning

confidence: 99%

Superior Resilience of Non-Gaussian Entanglement against Local Gaussian Noises

Filippov¹,

Alena

2022

Entropy

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Entanglement distribution task encounters a problem of how the initial entangled state should be prepared in order to remain entangled the longest possible time when subjected to local noises. In the realm of continuous-variable states and local Gaussian channels it is tempting to assume that the optimal initial state with the most robust entanglement is Gaussian too; however, this is not the case. Here we prove that specific non-Gaussian two-mode states remain entangled under the effect of deterministic local attenuation or amplification (Gaussian channels with the attenuation factor/power gain κi and the noise parameter μi for modes i=1,2) whenever κ1μ22+κ2μ12<14(κ1+κ2)(1+κ1κ2), which is a strictly larger area of parameters as compared to where Gaussian entanglement is able to tolerate noise. These results shift the “Gaussian world” paradigm in quantum information science (within which solutions to optimization problems involving Gaussian channels are supposed to be attained at Gaussian states).

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Optimal quantum phase estimation with generalized multi-component Schrödinger cat states

Cited by 10 publications

References 33 publications

A quantum-enhanced wide-field phase imager

A quantum-enhanced wide-field phase imager

Quantum Plasmonic Sensors

Superior Resilience of Non-Gaussian Entanglement against Local Gaussian Noises

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