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Two-step quantum direct communication protocol using the Einstein-Podolsky-Rosen pair block
A protocol for quantum secure direct communication using blocks of Einstein-Podolsky-Rosen (EPR) pairs is proposed. A set of ordered N EPR pairs is used as a data block for sending secret message…
Theoretically efficient high-capacity quantum-key-distribution scheme
A theoretical quantum key distribution scheme using Einstein-Podolsky-Rosen (EPR) pairs is presented. This scheme is efficient in that it uses all EPR pairs in distributing the key except those…
Reply to ``Comment on `Secure direct communication with a quantum one-time-pad' ''
The protocol uses batches of single photons prepared randomly in one of four different states to serve as a one-time pad which is used directly to encode the secret messages in one communication process and is unconditionally secure.
Controlled order rearrangement encryption for quantum key distribution
A technique is devised to perform orthogonal state quantum key distribution. In this scheme, entangled parts of a quantum information carrier are sent from Alice to Bob through two quantum channels.…
Quantum secure direct communication with high-dimension quantum superdense coding
A protocol that combines the ideas of block transmission, the ping-pong quantum secure direct communication protocol, and quantum superdense coding has the advantage of being secure and of high source capacity.
Grover algorithm with zero theoretical failure rate
- G. Long
- 13 June 2001
In a standard Grover's algorithm for quantum searching, the probability of finding the marked item is not exactly 1. In this paper we present a modified version of Grover's algorithm that searches a…
Efficient multiparty quantum-secret-sharing schemes
It is shown that in the Hillery-Buzek-Berthiaume quantum-secret-sharing scheme the secret information is shared in the parity of binary strings formed by the measured outcomes of the participants.
Bidirectional quantum key distribution protocol with practical faint laser pulses
A two-way protocol for the quantum key distribution with practical faint laser pulses that is secure and close to practical conditions, and does not require the exchange of measuring basis information between Alice and Bob, hence saving a lot of storage space.
Efficient scheme for initializing a quantum register with an arbitrary superposed state
This work presents a scheme that can most generally initialize a quantum register with an arbitrary superposition of basis states, and application of the scheme in some special cases is discussed.