Quantum cryptography without switching.

By Christian Weedbrook, A. Lance, Warwick P. Bowen, T. Symul, Timothy C. Ralph, Ping Koy Lam. Physical Review Letters, 2004

428 citations recorded by the source corpus.

We propose a new coherent state quantum key distribution protocol that eliminates the need to randomly switch between measurement bases. This protocol provides significantly higher secret key rates with increased bandwidths than previous schemes that only make single quadrature measurements. It also offers the further advantage of simplicity compared to all previous protocols which, to date, have relied on switching.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/ff970ae0941bf7e9eafdede53e6df55c3aae0f40

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In Atomic and Molecular Physics, and Optics

Citations in the corpus

Continuous‐Variable Quantum Key Distribution with Gaussian Modulation—The Theory of Practical Implementations (2017, methodology): “ time by randomly selecting between = 0 and = ˇ=2 for each incoming mode, or he measures both quadratures of each mode simultaneously, which is sometimes referred to as \no-switching protocol" [12]. The two variations of the protocol are illustrated in Figure 5.1. For the second approach Bob wi”
The security of practical quantum key distribution (2008, methodology): “We will come back to this point in Section V. 14 (Weedbrook et al., 2004), in which Alice still transmits doubly-modulated coherent states drawn from a bivariate Gaussian distribution, but Bob performs heterodyne instead of homodyne measurements25, that is, he measures both x and p quadratures…”
Fundamental limits of repeaterless quantum communications (2015, neutral): “By replacing this expression in equation (63), we get X”
The Impact of Quantum Computing on Present Cryptography (2018, methodology): “• Gaussian protocols ◦ Continuous variable version of BB84 [41] ◦ Continuous variable using coherent states [42] ◦ Coherent state QKD protocol [43] - based on simultaneous quadrature measurements.”
Advances in quantum cryptography (2019, neutral): “we show the thresholds for the one-way coherent-state protocol with heterodyne detection [376] and the two-way protocols with coherent states [395] (solid line) and largely-thermal states [413] (green dashed line).”
Distributing Secret Keys with Quantum Continuous Variables: Principle, Security and Implementations (2015, methodology): “On the other hand, in the case of the heterodyne protocol with coherent states [23], the quantity K ε ( N ) converges to the asymptotic value K , corresponding to a Gaussian attack, but the convergence is too slow to obtain a positive key rate for a reasonable block size N .”