Journal
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
Volume 51, Issue 9, Pages 2787-2797Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10773-012-1154-2
Keywords
Deterministic secure quantum communication; Collective detection; Quantum operation discrimination; Single photons
Categories
Funding
- NSFC [61170270, 61100203, 60903152, 61003286, 61121061]
- NCET [NCET-10-0260]
- SRFDP [20090005110010]
- Beijing Natural Science Foundation [4112040]
- Science and Technology on Communication Security Laboratory Foundation [9140C110101110 C1104]
- Fundamental Research Funds for the Central Universities [BUPT2011YB01, BUPT2011RC0505, 2011PTB-00-29, 2011RCZJ15]
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Two novel single-photon deterministic secure quantum communication (DSQC) schemes with collective detection are proposed. One is a two-party DSQC, the other is a DSQC network. In these two schemes, only single-photon source and single-photon measurements are required, which makes the schemes more feasible with present techniques. Apart from this, a detection strategy called collective detection is utilized in our schemes, in which the detection is taken only once after the whole process of particle transmission. Such detection strategy improves the efficiencies of our protocols and also reduces the cost of realization as the message sender only need to perform unitary operations in the whole communication. What's more, the efficiencies of qubits and source capacity are both high since almost all the states can be used to transmit message except the ones used for eavesdropping check and each single photon can carry one bit of information. Finally, we prove the security of the our protocols by using the theorems on quantum operation discrimination.
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