Implementation of SWAP test for two unknown states in photons via cross-Kerr nonlinearities under decoherence effect.

ABSTRACT: We present an optical scheme for a SWAP test (controlled swap operation) that can determine whether the difference between two unknown states (photons) using cross-Kerr nonlinearities (XKNLs). The SWAP test, based on quantum fingerprinting, has been widely applied to various quantum information processing (QIP) schemes. Thus, for a reliable QIP scheme, it is important to implement a scheme for a SWAP test that is experimentally feasible. Here, we utilize linearly and nonlinearly optical (XKNLs) gates to design a scheme for a SWAP test. We also analyze the efficiency and the performance of nonlinearly optical gates in our scheme under the decoherence effect and exhibit a technique employing quantum bus beams and photon-number-resolving measurements to reduce the effect of photon loss and de

SUBMITTER: Kang MS 

PROVIDER: S-EPMC6468003 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature