Time-resolved probing of many-body states in circuit-QED systems

Circuit-QED quantum simulators based on superconducting circuits provide a tool to study many-body phenomena in strongly interacting qubit systems. In this work, we perform experimental studies of time-resolved dynamics of superconducting qubit arrays embedded in a superconducting resonator. We demonstrate an occurrence of many-body Rabi oscillations and complex dynamics in the dispersive and the resonant regimes. At variance with single qubit Rabi oscillations, the many-body Rabi oscillations emerge as the amplitude of applied microwave pulse exceeds the critical value. The magnetic field tunable crossover between many-body and single particle Rabi oscillations is obtained. We also experimentally explore a possibility to realize a time crystalline order in an array of superconducting qubits by applying periodic sequence of pulses with excitation of nonequilibrium states in the system.