Journal
PHOTONICS FOR QUANTUM 2022
Volume 12243, Issue -, Pages -Publisher
SPIE-INT SOC OPTICAL ENGINEERING
DOI: 10.1117/12.2641717
Keywords
quantum key distribution; continuous variables; quantum security; bosonic systems
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Funding
- EPSRC via the quantum communications hub [EP/T001011/1]
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We extend the security of continuous variable quantum key distribution by applying one-way and two-way quantum communication to a multi-way setting. We assume the signals are encoded using Gaussian-modulated coherent states and travel through Gaussian channels characterized by loss and thermal noise. We quantify the reverse-reconciliation performance of the protocol for even and odd numbers of signal exchange.
We extend the asymptotic security of continuous variable quantum key distribution using one-way and two-way quantum communication to a multi-way setting: Quantum signals travel many times between the parties before the final detection. We assume that the encoded signals are Gaussian-modulated coherent states that travel each time through the same Gaussian channel characterized by loss and thermal noise. We then quantify the reverse-reconciliation performance of the protocol presenting results for even or odd numbers of signal exchange.
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