Optical quantum fingerprinting using higher-order interference

Date: 
Monday, February 5, 2018 - 4:00pm
Speaker: 
Michal Jachura
Speaker's Institution: 
University of Warsaw
We propose and discuss a novel optical quantum fingerprinting protocol which does not require a shared phase reference between the communicating parties. We show that the scaling of the protocol, in terms of transmittable classical information, is analogous to the recently proposed and demonstrated schemes based on coherent pulses and first-order optical interference [1,2]. The protocol performance is quantified with the help of Chernoff information. Finally we present a proof-of-principle experiment [3] which confirms the viability of our scheme in a realistic phase instable scenario.
 
[1]  F. Xu  et al. "Observation of quantum fingerprinting beating the classical limit,"  Nat. Commun. 6, 8735 (2015).
[2]  J.-Y. Guan et al. "Experimental quantum fingerprinting with weak coherent pulses," Phys. Rev. Lett. 116, 240502 (2016). 
[3]  M. Jachura et al. " Visibility-based hypothesis testing using higher-order optical interference"  arXiv:1710.04672 (2017).