Cited by 138Quantum Information and CryptographySemiconductor Quantum Structures and DevicesQuantum optics and atomic interactions

Quantum Teleportation with a Quantum Dot Single Photon Source

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Fattal, D., Diamanti, E., Inoue, K., Yamamoto, Y.·2004·Physical Review Letters

Abstract

We report the experimental demonstration of a quantum teleportation protocol with a semiconductor single photon source. Two qubits, a target and an ancilla, each defined by a single photon occupying two optical modes (dual-rail qubit), were generated independently by the single photon source. Upon measurement of two modes from different qubits and postselection, the state of the two remaining modes was found to reproduce the state of the target qubit. In particular, the coherence between the target qubit modes was transferred to the output modes to a large extent. The observed fidelity is 80%, in agreement with the residual distinguishability between consecutive photons from the source. An improved version of this teleportation scheme using more ancillas is the building block of the recent Knill, Laflamme, and Milburn proposal for efficient linear optics quantum computation.

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Crossref · 10.1103/physrevlett.92.037904

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13 of 13 references verified0 citation errors · 0 not checkable

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  • The controlled-NOT gate's process fidelity Fproc surpasses the threshold of 0.5, which is sufficient to confirm the gate's entangling capability.

    “Here, the F proc well surpasses the the threshold of 0.5, which is sufficient to confirm the entangling capability of our CNOT gate.”
  • The full quantum process fidelity Fproc of the controlled-NOT gate is bounded by 0.70(9) ≤ Fproc ≤ 0.85(7).

    “Thus, here we have 0.70(9) F proc 0.85 (7).”
  • The performance of the quantum controlled-NOT gate was evaluated using an efficient method proposed by Hofmann.

    “We experimentally evaluate the performance of the quantum CNOT gate using an efficient method proposed by Hofmann [50].”
  • The two complementary fidelities Fzz and Fxx are sufficient to give upper and lower bounds for the full quantum process fidelity Fproc.

    “These two complementary fidelities, F zz and F xx , are sufficient to give an upper and a lower bound for the full quantum process fidelity F proc of the gate by (F zz + F xx -1) F proc min(F zz , F xx ).”
  • The process fidelity is directly related to the quantum entangling capability of the controlled-NOT gate; the gate can produce entangled states from unentangled input states.

    “The process fidelity is directly related to the quantum entangling capability of the CNOT gate, that is, the CNOT gate can produce entangled states from unentangled input states [50].”

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Authors
Fattal, D., Diamanti, E., Inoue, K., & Yamamoto, Y.
Affiliations
Japan Science and Technology Agency (JP)
Venue
Physical Review Letters
Published
2004-01-23
Volume
92
Issue
3
Pages
037904-037904
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
OpenAlex
W2020498387
Cited by
138
References
13
Citations by year
2026: 2 · 2025: 2 · 2024: 9 · 2023: 2 · 2022: 5 · 2021: 2 · 2020: 4 · 2019: 4 · 2018: 6 · 2017: 2 · 2016: 6 · 2015: 8 · 2014: 4 · 2013: 5 · 2012: 1
FWCI
15.17
Type
journal article
Language
en
Open access
Locations
  • Physical Review Letters (publishedVersion)
  • PubMed (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Semiconductor Quantum Structures and Devices
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum optics and atomic interactions
Keywords
quantum teleportation, quantum dots, single-photon sources, semiconductor quantum emitters, post-selection, photon distinguishability

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