Picture of mobile phone running fintech app

Fintech: Open Access research exploring new frontiers in financial technology

Strathprints makes available Open Access scholarly outputs by the Department of Accounting & Finance at Strathclyde. Particular research specialisms include financial risk management and investment strategies.

The Department also hosts the Centre for Financial Regulation and Innovation (CeFRI), demonstrating research expertise in fintech and capital markets. It also aims to provide a strategic link between academia, policy-makers, regulators and other financial industry participants.

Explore all Strathclyde Open Access research...

Experimentally realizable quantum comparison of coherent states and its applications

Andersson, Erika and Curty, Marcos and Jex, Igor (2006) Experimentally realizable quantum comparison of coherent states and its applications. Physical Review A, 74 (2). 022304-1. ISSN 1094-1622

[img]
Preview
PDF (strathprints006195.pdf)
strathprints006195.pdf
Accepted Author Manuscript

Download (269kB) | Preview

Abstract

When comparing quantum states to each other, it is possible to obtain an unambiguous answer, indicating that the states are definitely different, already after a single measurement. In this paper we investigate comparison of coherent states, which is the simplest example of quantum state comparison for continuous variables. The method we present has a high success probability, and is experimentally feasible to realize as the only required components are beam splitters and photon detectors. An easily realizable method for quantum state comparison could be important for real applications. As examples of such applications we present a "lock and key" scheme and a simple scheme for quantum public key distribution.