Optimal super dense coding over noisy quantum channels

Distributed Quantum Computation over Noisy Channels

J. I. Cirac, A. K. Ekert, S. F. Huelga and C. Macchiavello Institut für Theoretische Physik, Universität Innsbruck, Technikerstrasse 25, A-6020, Innsbruck, Austria. Department of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, U. K. Optics Section, The Blackett Laboratory, Imperial College, London SW7 2BZ, U. K. Dipartimento di Fisica “A. Volta” and INFM Unità di Pavia, Via...

Probabilistic Super Dense Coding

We explore the possibility of performing super dense coding with non-maximally entangled states as a resource. Using this we find that one can send two classical bits in a probabilistic manner by sending a qubit. We generalize our scheme to higher dimensions and show that one can communicate 2 log2 d classical bits by sending a d-dimensional quantum state with a certain probability of success. ...

Quantum Secure Direct Communication using Entanglement and Super Dense Coding

This paper introduces a new quantum protocol for secure direct communication. This protocol is based on Entanglement and Super-Dense coding. In this paper we present some basic definitions of entanglement in quantum mechanics, present how to use the maximally entangled states known as Bell States, and super dense coding technique to achieve secure direct message communication. Finally, we will ...

Quantum Public-Key Cryptosystem Based on Super Dense Coding Technology

In this paper we provide a quantum public-key cryptosystem based on super dense coding technology. A user Alice shares a set of Einstein-Podolsky-Rosen (EPR) pairs with a key management center (KMC) in which the particles hold by Alice are the private key and the particle hold by KMC are the public key. By the help of the key management center any other user can send encrypted message to Alice....

Optimal block cosine transform image coding for noisy channels