Work

Re-examination of the role of displacement and photon catalysis operation in continuous variable measurement device-independent quantum key distribution

Year: 2024

Type: article

Abstract: We investigate the benefits of using m -photon catalyzed two-mode squeezed coherent ( m -PCTMSC) state in continuous variable measurement device-independent quantum key distribution (CV-MDI-QKD). To that end, we derive the Wigner characteristic function of the m -PCTMSC state and show that the 0-PCTMSC state is a Gaussian state and is an inferior choice as compared to the zero photon catalyzed two-mode squeezed vacuum state for CV-MDI-QKD. We carry out the optimization of the secret key rate with respect to all state parameters, namely variance, transmissivity, and displacement. Contrary to many recent proposals, the results show that zero- and single-photon catalysis operation provides only a marginal benefit in improving the maximum transmission distance. Secondly, we find that displacement offers no benefit in improving CV-MDI-QKD.

Source: Optics Express

DOI: 10.1364/oe.546946

Authors: Chandan Kumar, Arvind

Institutions: Homi Bhabha National Institute, Institute of Mathematical Sciences, Institute of Mathematical Sciences

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: Department of Science and Technology, Ministry of Science and Technology, India