In superconducting circuit,microwave resonators and capacitors are crucial components,and their quality has a strong impact on circuit performance.Here we develop a novel wet etching process to define these two compon...In superconducting circuit,microwave resonators and capacitors are crucial components,and their quality has a strong impact on circuit performance.Here we develop a novel wet etching process to define these two components using common photoresist developer as etchant.This method reduces subsequent steps and can be completed immediately after development.By measuring the internal quality factor of resonators,we show that it is possible to achieve similar or better performance when compared with samples made by standard etching processes.This easy-to-implement method may boost the yield hence providing an alternative fabrication process for microwave resonators and capacitors.展开更多
A semi-infinite waveguide acts as a mirror and helps protect the qubit in front of it from decoherence.Here,we investigate the interference effect in an open waveguide consisting of resonators with different decay rat...A semi-infinite waveguide acts as a mirror and helps protect the qubit in front of it from decoherence.Here,we investigate the interference effect in an open waveguide consisting of resonators with different decay rates.We find that a lossy resonator works as a mirror and changes the effective decay rate of the other.The spontaneous radiation of qubit is related to its environment,and we can control it by arranging the lossy resonator's position or frequency.Our approach helps improving the qubit performance,as well as the quantum gate fidelities.展开更多
The Jaynes–Cummings model plays an important role in quantum entanglement and state measurements.Here,we discuss how to realize it in a waveguide-mediated interaction system,which comprises a giant atom and a resonat...The Jaynes–Cummings model plays an important role in quantum entanglement and state measurements.Here,we discuss how to realize it in a waveguide-mediated interaction system,which comprises a giant atom and a resonator.We show the vacuum Rabi splitting and discuss how to achieve a unidirectional transport.We extend the Purcell effect in c QED to this waveguide QED system,showing how to control the giant atom decay rate.Our design can further be built experimentally and has application in quantum manipulation.展开更多
基金Project supported by the National Key R&D Program of China(Grant No.2016YFA0301802)the National Natural Science Foundation of China(Grant Nos.61521001 and 11890704)the Key R&D Program of Guangdong Province,China(Grant No.2018B030326001).
文摘In superconducting circuit,microwave resonators and capacitors are crucial components,and their quality has a strong impact on circuit performance.Here we develop a novel wet etching process to define these two components using common photoresist developer as etchant.This method reduces subsequent steps and can be completed immediately after development.By measuring the internal quality factor of resonators,we show that it is possible to achieve similar or better performance when compared with samples made by standard etching processes.This easy-to-implement method may boost the yield hence providing an alternative fabrication process for microwave resonators and capacitors.
基金the National Key R&D Progarm of China(Grant No.2016YFA0301802)the National Natural Science Foundation of China(Grant Nos.61521001,12074179,and 11890704)the Key R&D Program of Guangdong Province,China(Grant No.2018B030326001)。
文摘A semi-infinite waveguide acts as a mirror and helps protect the qubit in front of it from decoherence.Here,we investigate the interference effect in an open waveguide consisting of resonators with different decay rates.We find that a lossy resonator works as a mirror and changes the effective decay rate of the other.The spontaneous radiation of qubit is related to its environment,and we can control it by arranging the lossy resonator's position or frequency.Our approach helps improving the qubit performance,as well as the quantum gate fidelities.
基金supported by the NKRDP of China(Grant No.2016YFA0301802)NSFC(Grant No.61521001,No.12074179 and No.11890704)the Key R&D Program of Guangdong Province(Grant No.2018B030326001)。
文摘The Jaynes–Cummings model plays an important role in quantum entanglement and state measurements.Here,we discuss how to realize it in a waveguide-mediated interaction system,which comprises a giant atom and a resonator.We show the vacuum Rabi splitting and discuss how to achieve a unidirectional transport.We extend the Purcell effect in c QED to this waveguide QED system,showing how to control the giant atom decay rate.Our design can further be built experimentally and has application in quantum manipulation.
