Quantum Antibunching in Nonlinear Coupler Using Wigner Representation
Mohd Syafiq M. Hanapi, Abel-Baset M. A. Ibrahim, P. K. Choudhury · 2024
Antibunching, a key characteristic of single-photon sources, is crucial for quantum cryptography and quantum computing [1]. Nonlinear couplers have significant potential as generators of nonclassical light [2,3]. However, Limited research has been reported on antibunching in nonlinear couplers [4,5]. This study investigates antibunching in an innovative design of a nonlinear coupler (as fig. 1 shows) featuring three nonlinear waveguides, each comprising a material that exhibits the second-order nonlinearity.