Experimental Research On Quantum Simulation And Quantum Optics With Superconducting Xmon Qubit

In the past 20 years,superconducting quantum circuits based on Josephson junc-tions have become an important experimental research platform.In quantum computa-tion,there are various forms of superconducting qubit have been demonstrated exper-imentally,in which Xmon-type superconducting qubit achieve high-precision manip-ulation,non-demolition single-shot readout,and long decoherence time.The experi-mental demonstration of quantum error correction and multi-bit entanglement was also performed.In quantum optics,superconducting artificial atoms achieve strong coupling with microwave photons,demonstrating a series of quantum optical phenomena such as electromagnetically induced transparency.We also conducted a series of experimental studies on superconducting quantum circuits and explored their possible applications in quantum computing,quantum information,and quantum optics.It mainly includes the basic manipulation and measurement of superconducting magnetic flux qubit;the measurement of the Q factor of superconducting coplanar waveguide resonators;the influence of different fabrication processes on the Q factor of superconducting copla-nar waveguide resonators;experimental studying of longitudinal field modulation with Xmon superconducting quantum bit,and demonstrates the use of longitudinal field modulation to achieve single-microwave photon level routing control;using resonant cavity and Xmon superconducting qubit coupled system to study cavity-induced Autler-Townes Splitting(ATS)effect,the experimental demonstrate the possibility of control of the ATS effect by single photon,this effect can be used to implement single-photon-controlled single-microwave-photon-level routers;experimental demonstration of the irreversibility and dissipation relation in thermodynamics with Xmon superconducting qubit;using Xmon superconducting qubit simulate the dynamic phase transition of the Ising chain.