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Arbitrary quantum channel simulations of a superconducting qudit system

Weizhou Cai, Jiaxiu Han, Ling Hu +6 more

Bulletin of the American Physical SocietyMar 3, 20200 citations

Fast and high-fidelity quantum logic gates with superconducting circuits

Juan José García‐Ripoll, E. Torrontegui, Andrés Ruiz-Chamorro

Jul 15, 20190 citations

Quantum Optimal Control of Nuclear Spin for Quantum Logic with Qudits

Sivaprasad Omanakuttan, Anupam Mitra, Michael J. Martin +1 more

Bulletin of the American Physical SocietyJun 3, 20210 citations

High-Fidelity Software-Defined Quantum Logic on a Superconducting Qudit

Xian Wu, Spencer Tomarken, N. Anders Petersson +3 more

We present an efficient approach to achieving arbitrary, high-fidelity control of a multilevel quantum system using optimal control techniques. As an demonstration, we implement a continuous, software-defined microwave pulse to realize a 0↔2 SWAP gate that achieves an average gate fidelity of 99.4%. We describe our procedure for extracting the system Hamiltonian, calibrating the quantum and classical hardware chain, and evaluating the gate fidelity. Our work represents an alternative, fully generalizable route towards achieving universal quantum control by leveraging optimal control techniques.We present an efficient approach to achieving arbitrary, high-fidelity control of a multilevel quantum system using optimal control techniques. As an demonstration, we implement a continuous, software-defined microwave pulse to realize a 0↔2 SWAP gate that achieves an average gate fidelity of 99.4%. We describe our procedure for extracting the system Hamiltonian, calibrating the quantum and classical hardware chain, and evaluating the gate fidelity. Our work represents an alternative, fully generalizable route towards achieving universal quantum control by leveraging optimal control techniques.

arXiv:2005.13165Physical Review LettersOct 19, 202053 citations

Optimal control of stimulated Raman adiabatic passage in a superconducting qudit

Wen Zheng, Yu Zhang, Yuqian Dong +9 more

Abstract Stimulated Raman adiabatic passage (STIRAP) is a widely used protocol to realize high-fidelity and robust quantum control in various quantum systems. However, further application of this protocol in superconducting qubits is limited by population leakage caused by the only weak anharmonicity. Here, we introduce an optimally controlled shortcut-to-adiabatic (STA) technique to speed-up the STIRAP protocol in a superconducting qudit. By modifying the shapes of the STIRAP pulses, we experimentally realize a fast (32 ns) and high-fidelity (0.996 ± 0.005) quantum state transfer. In addition, we demonstrate that our protocol is robust against control parameter perturbations. Our stimulated Raman shortcut-to-adiabatic passage transition provides an efficient and practical approach for quantum information processing.Abstract Stimulated Raman adiabatic passage (STIRAP) is a widely used protocol to realize high-fidelity and robust quantum control in various quantum systems. However, further application of this protocol in superconducting qubits is limited by population leakage caused by the only weak anharmonicity. Here, we introduce an optimally controlled shortcut-to-adiabatic (STA) technique to speed-up the STIRAP protocol in a superconducting qudit. By modifying the shapes of the STIRAP pulses, we experimentally realize a fast (32 ns) and high-fidelity (0.996 ± 0.005) quantum state transfer. In addition, we demonstrate that our protocol is robust against control parameter perturbations. Our stimulated Raman shortcut-to-adiabatic passage transition provides an efficient and practical approach for quantum information processing.

arXiv:2111.10972npj Quantum InformationJan 27, 202243 citations

Optimal Control and Coherence Engineering for Superconducting Qubits

Yunwei Lu

Jan 1, 20260 citations

Quantum optimal control for high-fidelity arbitrary quantum logic on a superconducting qudit

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