Generating continuous variable quantum codewords in the near-field atomic lithography
TLDR
In this article, a neutral atom, falling through an optical cavity and interacting with a single mode of the intracavity electromagnetic field, can be used to safely encode a qubit into its external degrees of freedom.Abstract:
Recently, Gottesman et al (2001 Phys. Rev. A 64, 012310) showed how to encode a qubit into a continuous variable quantum system. This encoding was realized by using non-normalizable quantum codewords, which therefore can only be approximated in any real physical set-up. Here we show how a neutral atom, falling through an optical cavity and interacting with a single mode of the intracavity electromagnetic field, can be used to safely encode a qubit into its external degrees of freedom. In fact, the localization induced by a homodyne detection of the cavity field is able to project the near-field atomic motional state into an approximate quantum codeword. The performance of this encoding process is then analysed by evaluating the intrinsic errors induced in the recovery process by the approximated form of the generated codeword.read more
Citations
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Advances in quantum cryptography
Stefano Pirandola,Ulrik L. Andersen,Leonardo Banchi,Mario Berta,Darius Bunandar,Roger Colbeck,Dirk Englund,Tobias Gehring,Cosmo Lupo,Carlo Ottaviani,Jason Pereira,Mohsen Razavi,Jesni Shamsul Shaari,Marco Tomamichel,Vladyslav C. Usenko,Giuseppe Vallone,Paolo Villoresi,Petros Wallden +17 more
TL;DR: This review begins by reviewing protocols of quantum key distribution based on discrete variable systems, and considers aspects of device independence, satellite challenges, and high rate protocols based on continuous variable systems.
Journal ArticleDOI
Advances in Quantum Cryptography
Stefano Pirandola,Ulrik L. Andersen,Leonardo Banchi,Mario Berta,Darius Bunandar,Roger Colbeck,Dirk Englund,Tobias Gehring,Cosmo Lupo,Carlo Ottaviani,Jason Pereira,Mohsen Razavi,Jesni Shamsul Shaari,Marco Tomamichel,Vladyslav C. Usenko,Giuseppe Vallone,Paolo Villoresi,Petros Wallden +17 more
TL;DR: Quantum cryptography is arguably the fastest growing area in quantum information science as mentioned in this paper, and many quantum key distribution protocols have been proposed, both theoretically and experimentally, over the last few decades.
Journal ArticleDOI
Fault-tolerant measurement-based quantum computing with continuous-variable cluster states
TL;DR: By concatenating with one of these codes and using ancilla-based error correction, fault-tolerant measurement-based quantum computation of theoretically indefinite length is possible with finitely squeezed cluster states.
Journal ArticleDOI
Performance and structure of single-mode bosonic codes
Victor V. Albert,Victor V. Albert,Kyungjoo Noh,Kasper Duivenvoorden,Dylan Young,R. T. Brierley,Philip Reinhold,Christophe Vuillot,Linshu Li,Chao Shen,Steven Girvin,Barbara M. Terhal,Liang Jiang +12 more
TL;DR: An essential singularity is found in the entanglement fidelity of GKP codes in the limit of vanishing loss rate, and a generalization of spin-coherent states is introduced, extending the characterization to qudit binomial codes and yielding a multiqudit code.
Journal ArticleDOI
Fault-tolerant bosonic quantum error correction with the surface–Gottesman-Kitaev-Preskill code
TL;DR: In this article, the performance of the circuit-based surface-GKP bosonic quantum error correction code under noise due to finite squeezing of the GKP states and photon losses is investigated.
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