Interaction-Free Quantum Optical Fredkin Gates in $chi^$ Microdisks


We present novel “interaction-free” realizations of quantum optical Fredkin gates that do not rely on direct physical coupling between the target light (signal) and the control light (pump). The interaction-free feature of such gates allow to overcome the fundamental limits of photon loss and quantum-state decoherence imposed by the signal-pump coupling. This advantage, together with the low inherent quantum-noise level in χ(2) microdisks, gives rise to substantially improved performance over the existing Fredkin-gate designs. Explicitly using lithium-niobate mircrodisks, we present two kinds of interaction-free Fredkin gates, a phase gate and an optical-path gate, both of which are designed with telecom-band applications in mind. For both gates, the threshold pump peak power to achieve a gate contrast >;100 and a signal loss <;10% is hundreds of microwatts for practical parameters of the devices.

Did you like this research project?

To get this research project Guidelines, Training and Code... Click Here

PROJECT TITLE : Cross-Layer Approach for Minimizing Routing Disruption in IP Networks - 2014 ABSTRACT: Backup paths are widely used in IP networks to protect IP links from failures. However, existing solutions such as the commonly

Ready to Complete Your Academic MTech Project Work In Affordable Price ?

Project Enquiry