Dephasing of Exchange-Coupled Spins in Quantum Dots for Quantum Computing

Huang，Peihao1,2

2021

10.1002/qute.202100018

Advanced Quantum Technologies   影响因子和分区

2511-9044

A spin qubit in semiconductor quantum dots holds promise for quantum information processing for scalability and long coherence time. An important semiconductor qubit system is a double quantum dot trapping two electrons or holes, whose spin states encode either a singlet–triplet qubit or two single-spin qubits coupled by exchange interaction. In this article, progress on the spin dephasing of two exchange-coupled spins in a double quantum dot is reported. First, the schemes of two-qubit gates and qubit encodings in gate-defined quantum dots or donor atoms based on the exchange interaction are discussed. Then, the progress on spin dephasing of a singlet–triplet qubit or a two-qubit gate is reported. The methods of suppressing spin dephasing are further discussed. The understanding of the spin dephasing may provide insights into the realization of high-fidelity quantum gates for spin-based quantum computing.

dephasing exchange interaction quantum computing quantum dots spin qubits two-qubit gates

EI

英语

第一 ; 通讯

20213710888158

Encoding (symbols) ; Exchange interactions ; Logic gates ; Nanocrystals ; Qubits ; Spin fluctuations

Semiconductor Devices and Integrated Circuits:714.2 ; Logic Elements:721.2 ; Data Processing and Image Processing:723.2 ; Nanotechnology:761 ; Atomic and Molecular Physics:931.3

2-s2.0-85114668901

Scopus

1.Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Guangdong Provincial Key Laboratory of Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Huang，Peihao. Dephasing of Exchange-Coupled Spins in Quantum Dots for Quantum Computing[J]. Advanced Quantum Technologies,2021,4.

Huang，Peihao.(2021).Dephasing of Exchange-Coupled Spins in Quantum Dots for Quantum Computing.Advanced Quantum Technologies,4.

Huang，Peihao."Dephasing of Exchange-Coupled Spins in Quantum Dots for Quantum Computing".Advanced Quantum Technologies 4(2021).