Journal ArticleDOI
Quantum cryptography based on Bell's theorem.
TLDR
Practical application of the generalized Bells theorem in the so-called key distribution process in cryptography is reported, based on the Bohms version of the Einstein-Podolsky-Rosen gedanken experiment andBells theorem is used to test for eavesdropping.Abstract:
Practical application of the generalized Bells theorem in the so-called key distribution process in cryptography is reported. The proposed scheme is based on the Bohms version of the Einstein-Podolsky-Rosen gedanken experiment and Bells theorem is used to test for eavesdropping. © 1991 The American Physical Society.read more
Citations
More filters
Journal ArticleDOI
Towards quantum communications in free-space seawater.
TL;DR: It is experimentally demonstrated that polarization quantum states including general qubits of single photon and entangled states can survive well after travelling through seawater, representing the first step towards underwater quantum communication.
Journal ArticleDOI
Experimental quantum key distribution without monitoring signal disturbance
TL;DR: In this article, a proof-of-principle quantum key distribution experiment based on the round-robin differential phase shift protocol is demonstrated using a coherent wave-packet containing five pulses, the quantum keys were distributed over up to 30 km of fibre.
Journal ArticleDOI
Superlinear threshold detectors in quantum cryptography
Lars Lydersen,Lars Lydersen,Nitin Jain,Nitin Jain,Christoffer Wittmann,Christoffer Wittmann,Øystein Marøy,Øystein Marøy,Johannes Skaar,Johannes Skaar,Christoph Marquardt,Christoph Marquardt,Vadim Makarov,Vadim Makarov,Gerd Leuchs,Gerd Leuchs +15 more
TL;DR: In this article, the authors introduced the concept of superlinear threshold detector, a detector that has a higher probability to detect multiple photons if it receives them simultaneously rather than at separate times.
Journal ArticleDOI
Efficient entanglement distribution over 200 kilometers
James F. Dynes,Hiroki Takesue,Zhiliang Yuan,Andrew W. Sharpe,Ken Ichi Harada,Toshimori Honjo,Hidehiko Kamada,Osamu Tadanaga,Yoshiki Nishida,Masaki Asobe,Andrew J. Shields +10 more
TL;DR: The first demonstration of entanglement distribution over a record distance of 200 km which is of sufficient fidelity to realize secure communication is reported, and the outlook is extremely promising for real worldEntanglement-based communication between distantly separated parties.
Journal ArticleDOI
Robust Protocols for Securely Expanding Randomness and Distributing Keys Using Untrusted Quantum Devices
Carl A. Miller,Yaoyun Shi +1 more
TL;DR: The method achieves, for the first time, exponential expansion combined with cryptographic security and noise tolerance, and has the following new features: cryptographic level of security, tolerating a constant level of imprecision in devices, and requiring only unit size quantum memory in devices.