Exploiting the Quantum Zeno effect to beat photon loss in linear optical quantum information processors
نویسندگان
چکیده
We devise a new technique to enhance transmission of quantum information through linear optical quantum information processors. The idea is based on applying the Quantum Zeno effect to the process of photon absorption. By frequently monitoring the presence of the photon through a quantum non-demolition (QND) measurement the absorption is suppressed. Quantum information is encoded in the polarization degrees of freedom and is therefore not affected by the measurement. Some implementations of the QND measurement are proposed. 2005 Elsevier B.V. All rights reserved.
منابع مشابه
Single Photon Source Using Laser Pulses and Two-Photon Absorption
We have previously shown that two-photon absorption (TPA) and the quantum Zeno effect can be used to make deterministic quantum logic devices from an otherwise linear optical system. Here we show that this type of quantum Zeno gate can be used with additional two-photon absorbing media and weak laser pulses to make a heralded single photon source. A source of this kind is expected to have a num...
متن کاملModulation Response and Relative Intensity Noise Spectra in Quantum Cascade Lasers
Static properties, relatively intensity noise and intensity modulation response in quantum cascade lasers (QCLs) studied theoretically in this paper. The present rate equations model consists of three equations for the electrons density in the conduction band and one equation for photons density in cavity length. Two equations were derived to calculate the noise and modulation response. Calcula...
متن کاملSimulation and Design of an Organic Quantum Film Electrooptic Switch
In this paper the simulation and design of a quantum-film electro-optic switch is considered. This photonic device, is made from a new organic dipolar material called MNA or 2-methyl-4 nitroaniline, which possesses a high merit in comparison with it's inorganic counterparts (e.g. LiNbO3, GaAs, InSb, Quartz, etc). Montecarlo method is used to simulate the photon-it-electron interaction in this m...
متن کاملImproving the fidelity of optical Zeno gates via distillation
We have modeled the Zeno effect controlled-sign gate of Franson et al. Phys. Rev. A 70, 062302 2004 and shown that high two-photon to one-photon absorption ratios, , are needed for high fidelity free-standing operation. Hence we instead employ this gate for cluster state fusion, where the requirement for is less restrictive. With the help of partially offline one-photon and two-photon distillat...
متن کاملLinear and nonlinear optical properties of a modified Gaussian quantum dot: pressure, temperature and impurity effect
In this paper, the effect of pressure, temperature and impurity on the energylevels, binding energy, linear and nonlinear optical properties of a modified Gaussianquantum dot are studied. In this regard, the finite element method is employed to solvethe single electron Schrodinger equation in the effective mass approximation with andwithout impurity at the center of the dot. In addition, the en...
متن کامل