Quantum Random Access Codes Using Single<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>d</mml:mi></mml:math>-Level Systems

Tavakoli, Armin; Hameedi, Alley; Marques, Breno; Bourennane, Mohamed

doi:10.1103/physrevlett.114.170502

Cited by 110 publications

(153 citation statements)

References 27 publications

(36 reference statements)

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“…In terms of efficiency, it has been demonstrated, both theoretically and experimentally, that quantum protocols reduce the information transfer required to perform some specific distributed computational tasks . Some of these schemes provide an exponential advantage with respect to their classical counterparts while, at the same time, quantum systems also allow for a decrease in the amount of physical resources necessary for communication …”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12][13][14][15][16][17][18] Some of these schemes provide an exponential advantage with respect to their classical counterparts while, at the same time, quantum systems also allow for a decrease in the amount of physical resources necessary for communication. [19][20][21][22][23][24] Along these lines, a recent theoretical result [25] has shown that, by means of quantum superposition, it is possible to perform two-way communication between two distant parties which only exchange a single particle. Such an operation is impossible in classical physics, where two-way communication can be realized only if the parties exchange two particles, one per party, or if the same particle goes back and forth between them.…”

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confidence: 99%

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Experimental Two‐Way Communication with One Photon

et al. 2019

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Superposition of two or more states is one of the most fundamental concepts of quantum mechanics and provides a basis for several advantages offered by quantum information processing. This work reports the experimental demonstration of two‐way communication between two distant parties that can exchange only a single particle once, an impossible task in classical physics. This is achieved through preparation of a single photon in a coherent superposition of the two parties' locations. Furthermore, it is shown that this concept allows the parties to perform secure and anonymous quantum communication employing one particle per transmitted bit. These important features can lead to the realization of new quantum communication schemes, which are simultaneously anonymous, secure, and resource‐efficient.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Experimental Two‐Way Communication with One Photon

et al. 2019

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“…Evaluating (1) it is straightforward to find the average success probability p Q 2,d = 1/2 + 1/2 √ d. These specific QCRACs were shown to be optimal (at least) for d = 2, 3, 4, 5 [19]. In comparison, the optimal classical success probability is strictly smaller: p C 2,d = 1/2 + 1/2d [19].…”

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confidence: 99%

“…[19] and the experimental technique can be modified to realize the 2 (3) → 1 QCRAC, and (ii) EARACs have an important advantage over QCRACs in the sense that multiple copies of a basic EARAC can be used to implement a significantly more complex EARAC. Therefore, complex EARACs can be implemented without increasing the qualitative experimental complexity in terms of the requirements on state preparation and measurements for the basic 2 (3) → 1 EARAC.…”

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confidence: 99%

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Spatial versus sequential correlations for random access coding

et al. 2016

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Random access codes are important for a wide range of applications in quantum information. However, their implementation with quantum theory can be made in two very different ways: (i) by distributing data with strong spatial correlations violating a Bell inequality, or (ii) using quantum communication channels to create stronger-than-classical sequential correlations between state preparation and measurement outcome. Here, we study this duality of the quantum realization. We present a family of Bell inequalities tailored to the task at hand and study their quantum violations. Remarkably, we show that the use of spatial and sequential quantum correlations imposes different limitations on the performance of quantum random access codes: sequential correlations can outperform spatial correlations. We discuss the physics behind the observed discrepancy between spatial and sequential quantum correlations.

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Quantum Random Access Codes Implementation for Resource Allocation and Coexistence with Classical Telecommunication

Ribezzo,

Salazar,

Czartowski

et al. 2023

Adv Quantum Tech

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In a world where Quantum Networks are rapidly becoming a reality, the development of the Quantum Internet is gaining increasing interest. Nevertheless, modern quantum networks are still in the early stages of development and have limited capacity to distribute resources among different users – a constraint that needs to be taken into account. In this work, it aims to investigate these constraints, using a novel setup for implementing Quantum Random Access Codes (QRACs), communication protocols known for their quantum advantage over their classical counterparts and semi‐ device‐independent self‐testing applications. The QRAC states, made for the first time using weak coherent pulses instead of entangled single photons, allow us to experimentally test the encoding and decoding strategy from the resource allocation perspective. Moreover, by emulating a coexistent classical communication, it test the resilience of the implementation in presence of noise. The achieved results represent a significant milestone both for theoretical studies of quantum resource allocation and for the implementation of quantum infrastructures capable of coexisting with regular telecommunication networks.

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Quantum Random Access Codes Using Singled-Level Systems

Cited by 110 publications

References 27 publications

Experimental Two‐Way Communication with One Photon

Experimental Two‐Way Communication with One Photon

Spatial versus sequential correlations for random access coding

Quantum Random Access Codes Implementation for Resource Allocation and Coexistence with Classical Telecommunication

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