Principle of Quantum Key Distribution on an Optical Fiber Based on Time Shifts of TB Qubits
| Autor: | D. A. Makhorin, A. S. Zadorin |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Quantum network 010308 nuclear & particles physics General Physics and Astronomy Quantum Physics Quantum channel Quantum key distribution 01 natural sciences Qubit Quantum mechanics 0103 physical sciences W state 010306 general physics Superconducting quantum computing BB84 Entanglement distillation |
| Zdroj: | Russian Physics Journal. 59:346-351 |
| ISSN: | 1573-9228 1064-8887 |
| DOI: | 10.1007/s11182-016-0778-8 |
| Popis: | The possibility of the physical realization of a quantum key distribution scheme in an optical-fiber communication channel based on time coding of two- and three-level single-photon quantum states is demonstrated. It is proposed to employ shifts of TB qubits (time-bin qubits) as protected code combinations, transmitted over a quantum channel, and for registering individual photons – the corresponding qutrits prepared in unbalanced Mach–Zehnder interferometers. The possibility of enhancing the level of protection of the code combinations as a result of taking into account information about qubit basis states and their statistics is indicated. A computer model of the time coding of TB qubits based on the BB84 protocol is developed, and results of calculations confirming the realizability of the indicated principle are presented. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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