186 citations · 1k across the 35 of their papers we have counts for
9 papers · 1 filter
Coupling two charge qubits via a superconducting resonator operating in the resonant and dispersive regimes
Chengxian Zhang, Guo Xuan Chan, Xin Wang +1
A key challenge for semiconductor quantum-dot charge qubits is the realization of long-range qubit coupling and performing high-fidelity gates based on it. Here, we describe a new…
Implementation of geometric quantum gates on microwave-driven semiconductor charge qubits
Chengxian Zhang, Tao Chen, Xin Wang +1
A semiconductor-based charge qubit, confined in double quantum dots, can be a platform to implement quantum computing. However, it suffers severely from charge noises. Here, we pro…
High-fidelity geometric gate for silicon-based spin qubits
Chengxian Zhang, Tao Chen, Sai Li +2
High-fidelity manipulation is the key for the physical realization of fault-tolerant quantum computation. Here, we present a protocol to realize universal nonadiabatic geometric ga…
On the validity of microscopic calculations of double-quantum-dot spin qubits based on Fock-Darwin states
Guo Xuan Chan, Xin Wang
We consider two typical approximations that are used in the microscopic calculations of double-quantum dot spin qubits, namely, the Heitler-London (HL) and the Hund-Mulliken (HM) a…
Neural-network-designed pulse sequences for robust control of singlet-triplet qubits
Xu-Chen Yang, Man-Hong Yung, Xin Wang
Composite pulses are essential for universal manipulation of singlet-triplet spin qubits. In the absence of noise, they are required to perform arbitrary single-qubit operations du…
Suppression of charge noise using barrier control of a singlet-triplet qubit
Xu-Chen Yang, Xin Wang
It has been recently demonstrated that a singlet-triplet spin qubit in semiconductor double quantum dots can be controlled by changing the height of the potential barrier between t…
Energy spectrum, exchange interaction and gate crosstalk in a pair of double-quantum-dot system: a molecular orbital calculation
Xu-Chen Yang, Xin Wang
We present a theoretical study of a four-electron four-quantum-dot system based on molecular orbital methods, which hosts a pair of singlet-triplet spin qubits. We explicitly take…
Robust quantum control using smooth pulses and topological winding
Edwin Barnes, Xin Wang, S. Das Sarma
The greatest challenge in achieving the high level of control needed for future technologies based on coherent quantum systems is the decoherence induced by the environment. Here,…
Noise-resistant control for a spin qubit array
J. P. Kestner, Xin Wang, Lev S. Bishop +2
We develop a systematic method of performing corrected gate operations on an array of exchange-coupled singlet-triplet qubits in the presence of both fluctuating nuclear Overhauser…