Counterfactual quantum cryptography.

@article{Noh2008CounterfactualQC,
  title={Counterfactual quantum cryptography.},
  author={Tae-gon Noh},
  journal={Physical review letters},
  year={2008},
  volume={103 23},
  pages={
          230501
        }
}
  • T. Noh
  • Published 23 September 2008
  • Computer Science, Physics
  • Physical review letters
Quantum cryptography allows one to distribute a secret key between two remote parties using the fundamental principles of quantum mechanics. The well-known established paradigm for the quantum key distribution relies on the actual transmission of signal particle through a quantum channel. In this Letter, we show that the task of a secret key distribution can be accomplished even though a particle carrying secret information is not in fact transmitted through the quantum channel. The proposed… 

Assumptions in quantum cryptography

This thesis provides a comprehensive introduction to several concepts: quantum mechanics using the density operator formalism, quantum cryptography, and quantum key distribution, and proposes a framework that decomposes quantum-key-distribution protocols and their assumptions into several classes.

Analysis of counterfactuality of counterfactual communication protocols

This protocol and its modification are used as a test bed for analysis of meaning ofcounterfactuality to clarify the counterfactuality status of various counterfactual proposals.

Counterfactual Anonymous Quantum Teleportation in the Presence of Adversarial Attacks and Channel Noise

The security of the proposed anonymous quantum teleportation protocol is proved and it is shown that it achieves both the sender and receiver’s anonymity in the presence of active adversaries and untrusted parties.

“Interaction-Free” Channel Discrimination

An explicit protocol is devised with the property that both probabilities approach zero with an increasing number of channel uses, N, and an inequality is proved that quantifies the trade-off between the error probability and the “interaction” probability.

How Quantum is Quantum Counterfactual Communication?

Quantum Counterfactual Communication is the recently-proposed idea of using quantum physics to send messages between two parties, without any matter/energy transfer associated with the bits sent.

Other Inequalities, Cirelson’s Limit, Signaling

  • F. Laloë
  • Physics
    Do We Really Understand Quantum Mechanics?
  • 2019

Improved and Formal Proposal for Device Independent Quantum Private Query

This work exploits a tilted version of original CHSH game and proper testing of POVM devices and hence it guarantees device independence and provides formal security proofs and obtains an upper bound in information leakage to both dishonest client as well as dishonest server.

Quantum Information Protocols with Gaussian States of Light

This thesis deals with the development and implementation of quantum information protocols that utilize the rather inexpensive resource of Gaussian states, and introduces the idea of measurement device independence for continuous variable states and presents a proof-of-principle implementation of this protocol.