Quantum distribution of Gaussian keys using squeezed states

By Nicolas J. Cerf, Marc Levy, Gilles Van Assche. 2000

335 citations recorded by the source corpus.

A continuous key-distribution scheme is proposed that relies on a pair of conjugate quantum variables. It allows two remote parties to share a secret Gaussian key by encoding it into one of the two quadrature components of a single-mode electromagnetic field. The resulting quantum cryptographic information versus disturbance trade-off is investigated for an individual attack based on the optimal continuous cloning machine. It is shown that the information gained by the eavesdropper then simply equals the information lost by the receiver.

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

View Paper: https://www.semanticscholar.org/paper/1580ce084237750c43e82d6cca59920e722f06d8

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Artificial Intelligence

1. Stefano Pirandola
2. Eleni Diamanti
3. Marco Tomamichel
4. Mario Berta
5. Momtchil Peev
6. Chi-Hang Fred Fung
7. Philip Walther
8. Hannes Hübel

In Atomic and Molecular Physics, and Optics

1. Stefano Pirandola
2. Eleni Diamanti
3. Momtchil Peev
4. Chi-Hang Fred Fung
5. Philip Walther
6. Hannes Hübel
7. Andreas Poppe
8. Fabian Laudenbach

Citations in the corpus

• 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.”
• Distributing Secret Keys with Quantum Continuous Variables: Principle, Security and Implementations (2015, methodology): “Their entanglement-based version consists of preparing N two-mode squeezed states and measuring each mode with either homodyne detection (of a randomly-chosen quadrature) for [41] or with heterodyne detection for [23].”
• Advances in quantum cryptography (2019, positive): “[370] proposed the first all continuous QKD protocol, where the quadratures of a squeezed beam were used to encode a Gaussian-distributed secure key.”
• Continuous‐Variable Quantum Key Distribution with Gaussian Modulation—The Theory of Practical Implementations (2017, background): “Firstly proposed with discrete [5, 6, 7] and Gaussian [8] encoding of squeezed states, the concept was soon developed further to Gaussian-modulated CV-QKD with coherent states [9, 10, 11, 12].”