超导量子电路系统中Floquet调控及量子相变机制的研究

我们将借助超导量子电路系统和Floquet调制技术模拟光与原子的强关联相互作用，研究Floquet调制对处于超强耦合或者极强耦合的微波场和超导量子电路的可能影响。通过分析微波光子和超导量子比特在Floquet调制下的动力学行为、量子相变、量子临界行为和量子动力学相变，阐明存在强关联时Floquet调制手段对量子态动力学调控和量子态读出的作用机制。在此基础上，我们将在理论上探讨存在Floquet调制时量子比特状态的快速控制和快速读出方法；通过考查量子电路晶格中微波光子的隧穿、微波光子和超导量子比特的强相互作用之间的竞争机制，揭示Floquet调制的量子电路晶格系统发生量子相变的物理根源，以加深对Floquet相干调控机制的理解，从而为实现超快量子信息处理、寻找新型量子物态和奇异拓扑物理提供新的思路和可行方案。

We will use superconducting quantum circuit system and Floquet manipulation technology to simulate the strong correlation interaction between light and atoms, and study the possible influences of Floquet manipulation on microwave field and superconducting quantum circuit in ultra-strong coupling or deep-strong coupling. Through analyzing dynamic behaviors, quantum phase transitions, quantum critical behaviors and quantum dynamic phase transitions of microwave photons and superconducting qubits under Floquet manipulation, the action mechanism of Floquet manipulation on quantum state dynamical modulations and quantum state readout in the presence of strong correlation is explained. Based on these, we will theoretically discuss methods of fast control and fast readout of qubit state under existence of Floquet manipulation; By examining the competitive mechanisms between microwave photon tunneling and strong interaction of microwave photons and superconducting qubits, we will reveal the physical origin of quantum phase transitions in quantum circuit lattice system under Floquet manipulating so as to deepen our understanding of Floquet coherent modulating mechanism and provide new ideas and feasible solutions for realizing super-fast quantum information processing and hunting for new quantum matters and novel topological physics.