Experimental Two‐Way Communication with One Photon

Massa, Francesco; Moqanaki, Amir; Baumeler, Ämin; Santo, Flavio Del; Kettlewell, Joshua A.; Dakić, Borivoje; Walther, Philip

doi:10.1002/qute.201900050

Cited by 41 publications

(26 citation statements)

References 42 publications

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“…The latter would thus contribute to the operational and physical understanding of quantum theory [10][11][12][13] and provide indications for potential developments of post-quantum theories. Moreover, our work deepens the connection between interference and information processing which has already been alluded to in various contexts involving two-way communication [14][15][16], information speed [17], quantum acausal processes [18], superposition of orders [19] and directions [20], quantum combs [21], quantum switch [22] and quantum causal models [23].…”

Section: Introductionmentioning

confidence: 72%

Interference as an information-theoretic game

Horvat

Dakić

2021

Quantum

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The double slit experiment provides a clear demarcation between classical and quantum theory, while multi-slit experiments demarcate quantum and higher-order interference theories. In this work we show that these experiments pertain to a broader class of processes, which can be formulated as information-processing tasks, providing a clear cut between classical, quantum and higher-order theories. The tasks involve two parties and communication between them with the goal of winning certain parity games. We show that the order of interference is in one-to-one correspondence with the parity order of these games. Furthermore, we prove the order of interference to be additive under composition of systems both in classical and quantum theory. The latter result can be used as a (semi)device-independent witness of the number of particles in the quantum setting. Finally, we extend our game formulation within the generalized probabilistic framework and prove that tomographic locality implies the additivity of the order of interference under composition. These results shed light on the operational meaning of the order of interference and can be important for the identification of the information-theoretic principles behind second-order interference in quantum theory.

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Section: Introductionmentioning

confidence: 72%

Interference as an information-theoretic game

Horvat

Dakić

2021

Quantum

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“…However, the error-rate threshold 5.7% for the DL04-QSDC protocol using four nonorthogonal states in reference [58] is a good estimate of the upper bound. In practical implementation of this protocol, forward error correction [79] might be more practical and easier, and explicit correction codes should be constructed, like those in references [57,80].…”

Section: Discussionmentioning

confidence: 99%

Quantum secure direct communication based on single-photon Bell-state measurement

Long

2020

New J. Phys.

104

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Security loopholes exploiting the flaws of practical apparatus, especially non-ideal photon detectors, are pressing issues in practical quantum communication. We propose a simple quantum secure direct communication protocol based on single-photon Bell-state measurement and remove side-channel attacks on photon detectors. This quantum communication protocol in principle works in a deterministic way, and it does not require the two-photon interference of photons from independent sources. The single-photon Bell-state measurement with a unity efficiency can be constructed with only linear optics, which significantly simplifies its experimental implementation. Furthermore, we prove that our quantum secure direct communication protocol is immune to general detector-side-channel attacks.

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“…In the previous experimental quantum communication protocols, the information is encoded in various degrees of freedom such as the polarization of the photons, 40 the phase of the particle, 41–43 and time‐bin states 44,45 . Here we propose a scheme to realize quantum secure data transfer with the single photons emitted from the trapped atoms which are in time‐bin states.…”

Section: Introductionmentioning

confidence: 99%

Quantum secure data transfer with pulse shape encoded optical qubits

Wang

2021

Quantum Engineering

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Quantum secure data transfer is an important topic for quantum cyber security. We propose a scheme to realize quantum secure data transfer in the basis of quantum secure direct communication (QSDC). In this proposal, the transmitted data is encoded in the pulse shape of a single optical qubit, which is emitted from a trapped atom owned by the sender and received by the receiver with another trapped atom. The encoding process can be implemented with high fidelity by controlling the time‐dependent driving pulse on the trapped atom to manipulate the Rabi frequency in accordance with the target pulse shape of the emitted photons. In the receiving process, we prove that, the single photon can be absorbed with arbitrary probability by selecting appropriate driving pulse. We also show that, based on the QSDC protocol, the data transfer process is immune to the individual attacks.

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Experimental Two‐Way Communication with One Photon

Cited by 41 publications

References 42 publications

Interference as an information-theoretic game

Interference as an information-theoretic game

Quantum secure direct communication based on single-photon Bell-state measurement

Quantum secure data transfer with pulse shape encoded optical qubits

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