Distributed quantum sensing of multiple phases with fewer photons

Kim, Dong-Hyun; Hong, Seongjin; Kim, Yong-Su; Kim, Yosep; Lee, Seung-Woo; Pooser, Raphael C.; Oh, Kyunghwan; Lee, Su-Yong; Lee, Changhyoup; Lim, Hyang-Tag

doi:10.1038/s41467-023-44204-z

Cited by 8 publications

(3 citation statements)

References 38 publications

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“…One may also investigate if similar advantage and robustness can be obtained by employing other strategies such as reference configurations [43] or post-selection [44]. Another application of this work can be made to estimate a linear function of multiple parameters such as distributed quantum sensing [4,5,10,45].…”

Section: Discussionmentioning

confidence: 98%

Optimal multiple-phase estimation with multi-mode NOON states against photon loss

Namkung,

Kim,

Hong

et al. 2024

New J. Phys.

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Multi-mode NOON states can quantum-enhance multiple-phase estimation in the absence of photon loss. However, a multi-mode NOON state is known to be vulnerable to photon loss, and its quantum-enhancement can be dissipated by lossy environment. In this work, we demonstrate that a quantum advantage in estimate precision can still be achieved in the presence of photon loss. This is accomplished by optimizing the weights of the multi-mode NOON states according to photon loss rates in the multiple modes, including the reference mode which deﬁnes the other phases. For practical relevance, we also show that photon-number counting via a multi-mode beam-splitter achieves the useful, albeit sub-optimal, quantum advantage. We expect this work to provide valuable guidance for developing quantum-enhanced multiple-phase estimation techniques in lossy environments.

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Section: Discussionmentioning

confidence: 98%

Optimal multiple-phase estimation with multi-mode NOON states against photon loss

Namkung,

Kim,

Hong

et al. 2024

New J. Phys.

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“…The protocol that we have proposed can not only be applicable for quantum repeaters but also in certain schemes of quantum cryptography for which the distribution of entangled states is necessary, such as quantum cryptography, distributed quantum computing, and quantum sensing. For instance, one such feasibility is in the counterfactual distributed quantum sensing [49,50] and corresponding secure counterparts [51]. This requires more attention to optimization [46] of counterfactual quantum network.…”

Section: Discussionmentioning

confidence: 99%

Quantum networks using counterfactual quantum communication

Warke,

Thapliyal,

Pathak

2024

Phys. Scr.

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Counterfactual quantum communication is one of the most interesting facets of quantum communication, allowing two parties to communicate without any transmission of quantum or classical particles between the parties involved in the communication process. This aspect of quantum communication originates from the interaction-free measurements where the chained quantum Zeno effect plays an important role. Here, we propose a new counterfactual quantum communication protocol for transmitting an entangled state from a pair of electrons to two independent photons. Interestingly, the protocol proposed here shows that the counterfactual method can be employed to transfer information from house qubits to flying qubits. Following this, we show that the protocol finds uses in building quantum repeaters leading to a counterfactual quantum network, enabling counterfactual communication over a linear quantum network. 

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“…We now consider a second scenario, involving the estimate of two or three phases embedded in a multiarm interferometers injected with two-photon states. This choice is motivated by the fact that such states and platforms are now standard in quantum optics research and are successfully used for quantum multiparameter estimations [24,26,43,50,51]. Starting from the scheme reported in figure 4, the applied transformation in the considered single and multiparameter scenarios is…”

Section: Multiparameter Casementioning

confidence: 99%

Benchmarking Bayesian quantum estimation

Cimini,

Polino,

Valeri

et al. 2024

Quantum Sci. Technol.

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The quest for precision in parameter estimation is a fundamental task in different scientific areas. The relevance of this problem thus provided the motivation to develop methods for the application of quantum resources to estimation protocols. Within this context, Bayesian estimation offers a complete framework for optimal quantum metrology techniques, such as adaptive protocols. However, the use of the Bayesian approach requires extensive computational resources, especially in the multiparameter estimations that represent the typical operational scenario for quantum sensors. Hence, the requirement to characterize protocols implementing Bayesian estimations can become a significant challenge. This work focuses on the crucial task of robustly benchmarking the performances of these protocols in both single and multiple-parameter scenarios. By comparing different figures of merits, evidence is provided in favor of using the median of the quadratic error in the estimations in order to mitigate spurious effects due to the numerical discretization of the parameter space, the presence of limited data, and numerical instabilities. These results, providing a robust and reliable characterization of Bayesian protocols, find natural applications to practical problems within the quantum estimation framework.

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Distributed quantum sensing of multiple phases with fewer photons

Cited by 8 publications

References 38 publications

Optimal multiple-phase estimation with multi-mode NOON states against photon loss

Optimal multiple-phase estimation with multi-mode NOON states against photon loss

Quantum networks using counterfactual quantum communication

Benchmarking Bayesian quantum estimation

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