Yukai Wu
Tsinghua University
Ion trapCouplingQuantum entanglementPhysicsQuantum decoherenceTopologyIonPhotonQuantum simulatorQuantum networkQubitComputer scienceQuantum error correctionQuantum information scienceSuperconductivityQuantum computerQuantum gateQuantum mechanicsRealization (systems)Quantum
48Publications
14H-index
565Citations
Publications 48
Newest
#1Zhiling WangH-Index: 2
Last. Luming DuanH-Index: 64
view all 9 authors...
High fidelity single shot qubit state readout is essential for many quantum information processing protocols. In superconducting quantum circuit, the qubit state is usually determined by detecting the dispersive frequency shift of a microwave cavity from either transmission or reflection. In this paper, we demonstrate the use of constructive interference between the transmitted and reflected signal to optimize the qubit state readout, with which we find a better resolved state discrimination and...
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#2Jing Wang (THU: Tsinghua University)H-Index: 13
#3Zhong Wang (THU: Tsinghua University)H-Index: 29
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#1Chang Li (THU: Tsinghua University)H-Index: 7
#2S. Zhang (THU: Tsinghua University)H-Index: 2
Last. Luming Duan (THU: Tsinghua University)H-Index: 64
view all 6 authors...
For scalable quantum communication and networks, a key step is to realize a quantum repeater node that can efficiently connect different segments of atom-photon entanglement using quantum memories. We report a compact and hardware-efficient realization of a quantum repeater node using a single atomic ensemble for multicell quantum memories. Millisecond lifetime is achieved for individual memory cells after suppressing the magnetic-field-induced inhomogeneous broadening and the atomic-motion-indu...
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#1Quanxin MeiH-Index: 1
Last. Luming DuanH-Index: 64
view all 8 authors...
Quantum simulation provides important tools in studying strongly correlated many-body systems with controllable parameters. As a hybrid of two fundamental models in quantum optics and in condensed matter physics, Rabi-Hubbard model demonstrates rich physics through the competition between local spin-boson interactions and long-range boson hopping. Here we report an experimental realization of the Rabi-Hubbard model using up to 16trapped ions and present a controlled study of its equilibrium p...
#3Quanxin Mei (THU: Tsinghua University)H-Index: 1
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#5Jing Wang (THU: Tsinghua University)H-Index: 13
#6Zhong Wang (THU: Tsinghua University)H-Index: 29
Last. Huan Wang (THU: Tsinghua University)H-Index: 4
view all 10 authors...
Cross-resonance (CR) gate has emerged as a promising scheme for fault-tolerant quantum computation with fixed-frequency qubits. We experimentally implement entangling CR gate by using a microwave-only control in a tunable coupling superconducting circuit, where the tunable coupler provides extra degrees of freedom to verify optimal condition for constructing CR gate. By developing three-qubit CR Hamiltonian tomography protocol, we systematically investigate the dependency of gate fidelities on s...
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#1Zenghui Bao (THU: Tsinghua University)
#2Zhiling Wang (THU: Tsinghua University)H-Index: 2
Last. Luming Duan (THU: Tsinghua University)H-Index: 64
view all 8 authors...
We realize on-demand storage and retrieval of weak coherent microwave photon pulses at the single-photon level. A superconducting multiresonator system which is composed of a set of frequency-tunable coplanar waveguide resonators is implemented as the quantum memory. By dynamically tuning the resonant frequencies of the resonators, we achieve tunable memory bandwidth from 10 to 55 MHz, with well preserved phase coherence. We further demonstrate on-demand storage and retrieval of a time-bin flyin...
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Trapped ions constitute one of the most promising systems for implementing quantum computing and networking. For large-scale ion-trap-based quantum computers and networks, it is critical to have two types of qubits, one for computation and storage, while the other for auxiliary operations like runtime qubit detection, sympathetic cooling, and repetitive entanglement generation through photon links. Dual-type qubits have previously been realized in hybrid systems using two ion species, which, how...
#2S. Zhang (THU: Tsinghua University)H-Index: 2
The quantum repeater protocol is a promising approach for implementing long-distance quantum communication and large-scale quantum networks. A key idea of the quantum repeater protocol is to use long-lived quantum memories to achieve an efficient entanglement connection between different repeater segments, with polynomial scaling. Here, we report an experiment that realizes the efficient connection of two quantum repeater segments via on-demand entanglement swapping through the use of two atomic...
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