2012/01/17 by X. Q. Luo, Xiaoqing Luo, Luo, X. Q. +8
Computer Science · Physics and Astronomy · #FOS: Physical sciences #Optics (physics.optics) #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Physics (quant-ph) #Semiconductor Quantum Structures and Devices #physics.optics #quant-ph
paper · pdf · doi:10.48550/arxiv.1201.3434
7 pages, 5 figures
openalex publication_date 2012/01/17 · arxiv created 2012/01/18 · arxiv updated 2012/01/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We present a realization of two-qubit controlled-phase gate, based on the linear and nonlinear properties of the probe and signal optical pulses in an asymmetric GaAs/AlGaAs double quantum wells. It is shown that, in the presence of cross-phase modulation, a giant cross-Kerr nonlinearity and mutually matched group velocities of the probe and signal optical pulses can be achieved while realizing the suppression of linear and self-Kerr optical absorption synchronously. These characteristics serve to exhibit an all-optical two-qubit controlled-phase gate within efficiently controllable photon-photon entanglement by semiconductor mediation. In addition, by using just polarizing beam splitters and half-wave plates, we propose a practical experimental scheme to discriminate the maximally entangled polarization state of two-qubit through distinguishing two out of the four Bell states. This proposal potentially enables the realization of solid states mediated all-optical quantum computation and information processing.