Superconducting circuit quantum electrodynamics(QED)architecture composed of superconducting qubit and resonator is a powerful platform for exploring quantum physics and quantum information processing.By employing tec...Superconducting circuit quantum electrodynamics(QED)architecture composed of superconducting qubit and resonator is a powerful platform for exploring quantum physics and quantum information processing.By employing techniques developed for superconducting quantum computing,we experimentally investigate phase-sensitive Landau-Zener-Stückelberg(LZS)interference phenomena in a circuit QED.Our experiments cover an extensive range of LZS transition parameters and demonstrate the LZS induced Rabi-like oscillation as well as phase-dependent steady-state population.展开更多
The recently observed two-photon Landau-Zener-Stückelberg-Majorana(LZSM)effect in superconducting circuits[Phys.Rev.Lett.134060602(2025)]has provided a robust pathway for high-fidelity population transfer in qudi...The recently observed two-photon Landau-Zener-Stückelberg-Majorana(LZSM)effect in superconducting circuits[Phys.Rev.Lett.134060602(2025)]has provided a robust pathway for high-fidelity population transfer in qudit systems,but its adiabatic nature necessitates long operation times,which are vulnerable to decoherence.展开更多
We study theoretically the nonadiabatic geometric phase of a doubly driven two-level system with an additional relative phase between the two driving modes introduced in. It is shown that the time evolution of the sys...We study theoretically the nonadiabatic geometric phase of a doubly driven two-level system with an additional relative phase between the two driving modes introduced in. It is shown that the time evolution of the system strongly depends on this relative phase. The condition for the system returning to its initial state after a single period is given by the means of the Landau–Zener–Stückelberg–Majorana destructive interference. The nonadiabatic geometric phase accompanying a cyclic evolution is shown to be related to the Stokes phase as well as this relative phase. By controlling the relative phase, the geometric phase can characterize two distinct phases in the adiabatic limit.展开更多
基金Project supported by the Key-Area Research and Development Program of Guangdong Province,China(Grant No.2018B030326001)the National Natural Science Foundation of China(Grant Nos.U1801661,11874065,and Youth Project No.11904158)+2 种基金the Guangdong Provincial Key Laboratory(Grant No.2019B121203002)the Natural Science Foundation of Hunan Province,China(Grant No.2018JJ1031)the Science,Technology and Innovation Commission of Shenzhen Municipality(Grant Nos.JCYJ20170412152620376 and YTDPT20181011104202253)。
文摘Superconducting circuit quantum electrodynamics(QED)architecture composed of superconducting qubit and resonator is a powerful platform for exploring quantum physics and quantum information processing.By employing techniques developed for superconducting quantum computing,we experimentally investigate phase-sensitive Landau-Zener-Stückelberg(LZS)interference phenomena in a circuit QED.Our experiments cover an extensive range of LZS transition parameters and demonstrate the LZS induced Rabi-like oscillation as well as phase-dependent steady-state population.
基金supported by the National Natural Science Foundation of China(Grant Nos.12575032,62571494,12304407,and 12274376)the Natural Science Foundation of Henan Province(Grant No.232300421075)the China Postdoctoral Science Foundation(Grant Nos.2023TQ0310 and 2024M762973)。
文摘The recently observed two-photon Landau-Zener-Stückelberg-Majorana(LZSM)effect in superconducting circuits[Phys.Rev.Lett.134060602(2025)]has provided a robust pathway for high-fidelity population transfer in qudit systems,but its adiabatic nature necessitates long operation times,which are vulnerable to decoherence.
基金the Special Foundation for theoretical physics Research Program of China (Grant No. 11647165)the China Postdoctoral Science Foundation Funded Project (Project No. 2020M673118)+3 种基金the funding from the National Natural Science Foundation of China (Grant No. 11874247)the National Key Research and Development Program of China (Grant No. 2017YFA0304500)the Program of State Key Laboratory of Quantum Optics and Quantum Optics Devices, China (Grant No. KF201703)the support from Guangdong Provincial Key Laboratory (Grant No. 2019B121203002)。
文摘We study theoretically the nonadiabatic geometric phase of a doubly driven two-level system with an additional relative phase between the two driving modes introduced in. It is shown that the time evolution of the system strongly depends on this relative phase. The condition for the system returning to its initial state after a single period is given by the means of the Landau–Zener–Stückelberg–Majorana destructive interference. The nonadiabatic geometric phase accompanying a cyclic evolution is shown to be related to the Stokes phase as well as this relative phase. By controlling the relative phase, the geometric phase can characterize two distinct phases in the adiabatic limit.
