Generation of optical Fock and W states with single-atom-based bright quantum scissors  

作　　者：Ziv Aqua MSKim Barak Dayan 

机构地区：[1]AMOS and Department of Chemical and Biological Physics,Weizmann Institute of Science,Rehovot 76100,Israel [2]QOLS,Blackett Laboratory,Imperial College London,London SW72AZ,UK

出　　处：《Photonics Research》2019年第11期I0001-I0011,共11页光子学研究（英文版）

基　　金：Israel Science Foundation(1798/17);Minerva Foundation;Korea Institute of Science and Technology(2E26680-19-P025);Samsung;Royal Society;Crown Photonics Center;European Commission;Weizmann-UK

摘　　要：We introduce a multi-step protocol for optical quantum state engineering that performs as "bright quantum scissors," namely truncating an arbitrary input quantum state to have at least a certain number of photons.The protocol exploits single-photon pulses and is based on the effect of single-photon Raman interaction,which is implemented with a single three-level Λ system(e.g., a single atom) Purcell-enhanced by a singlesided cavity. A single step of the protocol realizes the inverse of the bosonic annihilation operator. Multiple iterations of the protocol can be used to deterministically generate a chain of single photons in a W state.Alternatively, upon appropriate heralding, the protocol can be used to generate Fock-state optical pulses.This protocol could serve as a useful and versatile building block for the generation of advanced optical quantum states that are vital for quantum communication, distributed quantum information processing, and all-optical quantum computing.We introduce a multi-step protocol for optical quantum state engineering that performs as "bright quantum scissors," namely truncating an arbitrary input quantum state to have at least a certain number of photons.The protocol exploits single-photon pulses and is based on the effect of single-photon Raman interaction,which is implemented with a single three-level Λ system(e.g., a single atom) Purcell-enhanced by a singlesided cavity. A single step of the protocol realizes the inverse of the bosonic annihilation operator. Multiple iterations of the protocol can be used to deterministically generate a chain of single photons in a W state.Alternatively, upon appropriate heralding, the protocol can be used to generate Fock-state optical pulses.This protocol could serve as a useful and versatile building block for the generation of advanced optical quantum states that are vital for quantum communication, distributed quantum information processing, and all-optical quantum computing.

关 键 词：QUANTUM FOCK STATES 

分 类 号：O41[理学—理论物理]