# Quantum key distribution using two coherent states of light and their superposition

@article{Nambu2000QuantumKD, title={Quantum key distribution using two coherent states of light and their superposition}, author={Yoshihiro Nambu and Akihisa Tomita and Yoshie Chiba-Kohno and K Nakamura}, journal={Physical Review A}, year={2000}, volume={62}, pages={012312} }

Quantum mechanical complementarity ensures the security of the key-distribution scheme reported by Brassard and Bennet in 1984 (BB84), but does not prohibit use of multi-photons as a signal carrier. We describe a novel BB84 scheme in which two nearly orthogonal coherent states carry the key, and the superposition of these states (cat states) protects the communication channel from eavesdropping. Information leakage to eavesdroppers can be determined from the visibility of the interferential…

## 3 Citations

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## References

SHOWING 1-10 OF 119 REFERENCES

Generalized privacy amplification

- Computer ScienceIEEE Trans. Inf. Theory
- 1995

This paper provides a general treatment of privacy amplification by public discussion, a concept introduced by Bennett, Brassard, and Robert for a special scenario, and yields results on wiretap and broadcast channels for a considerably strengthened definition of secrecy capacity.

Quantum detection and estimation theory

- Mathematics
- 1969

A review. Quantum detection theory is a reformulation, in quantum-mechanical terms, of statistical decision theory as applied to the detection of signals in random noise. Density operators take the…

Quantum Information and Computation (QUIC)

- Mathematics
- 2001

Abstract : A broad, multidisciplinary program has been pursued in the area of quantum computation and information. Principal accomplishments include an experiment to localize atoms within a high…

Quantum Theory: Concepts and Methods

- Physics
- 1993

Preface. Part I: Gathering the Tools. 1. Introduction to Quantum Physics. 2. Quantum Tests. 3. Complex Vector Space. 4. Continuous Variables. Part II: Cryptodeterminism and Quantum Inseparability. 5.…

Methods in Theoretical Quantum Optics

- Physics, Computer Science
- 1997

1. Foundations 2. Coherent interactions 3. Operators and states 4. Quantum statistics of fields 5. Dissipative processes 6. Dressed states Appendices Selected bibliography Index 1. Foundations 2.…

States, effects, and operations : fundamental notions of quantum theory : lectures in mathematical physics at the University of Texas at Austin

- Mathematics
- 1983

States and effects.- Operations.- The first Representation theorem.- Composite systems.- The second representation theorem.- 6 Coexistent effects and observables.- References.

Phys

- Rev. Lett. 74, 3307
- 1995

Phys. Rev. Lett

- Phys. Rev. Lett
- 1995

Phys

- Rev. A 61, 022309
- 2000

Phys. Rev. A

- Phys. Rev. A
- 1998