Efficient experimental quantum fingerprinting with wavelength division multiplexing
arXiv:2005.06049 · doi:10.1038/s41467-021-24745-x
Abstract
Quantum communication complexity studies the efficiency of information communication (that is, the minimum amount of communication required to achieve a certain task) using quantum states. One representative example is quantum fingerprinting, in which the simultaneous message passing model is considered and the minimum amount of communication could be exponentially smaller than the classical fingerprinting protocol. Experimental demonstrations based on a practical quantum fingerprinting protocol where coherent states are used to construct the fingerprints, have successfully shown the superiority of quantum fingerprinting. However, as a consequence of using coherent states, the communication time in this coherent quantum fingerprinting (CQF) protocol is increased. Moreover, the minimum amount of information communicated in these experimental demonstrations is largely limited by the dark counts of the single photon detectors. Here, we propose to enhance the performance of the existing CQF protocol through applying wavelength division multiplexing (WDM) and simultaneous detection of multiple wavelength channels. We show that the new WDM-CQF protocol can potentially reduce the communication time significantly. More importantly, with the same experimental parameters, the amount of communication is much reduced in the new scheme compared with the original CQF protocol. The more wavelength channels are used, the less communication is required by WDM-CQF protocol. We also perform a proof-of-concept experimental demonstration of the new WDM-CQF protocol with 6 wavelength channels. The experimental results further validate that the new scheme with WDM not only beats the classical protocol, but also reduces the amount of communication required by the original CQF protocol by more than half.
arXiv comment11 pages, 5 figures
References in corpus (16)
- Quantum Cryptography
- Quantum Communication
- Secure quantum key distribution with realistic devices
- Secure Quantum Key Distribution
- Quantum fingerprinting
- Violation of Bell's inequality: criterion for quantum communication complexity advantage
- Proof-of-principle experimental demonstration of twin-field type quantum key distribution
- Experimental Quantum Switching for Exponentially Superior Quantum Communication Complexity
- Experimental Quantum Fingerprinting
- Quantum Fingerprinting with Coherent States and a Constant Mean Number of Photons
- Single-qubit optical quantum fingerprinting
- Observation of quantum fingerprinting beating the classical limit
- Toward A Reconfigurable Quantum Network Enabled by a Broadband Entangled Source
- Efficient quantum communications with multiplexed coherent state fingerprints
- One-qubit fingerprinting schemes
- Visibility-based hypothesis testing using higher-order optical interference