Single-Qubit Operations for Singlet-Triplet Qubits in an Isolated Double-Well with Fixed Tunneling

• Published in: Chinese physics letters Vol. 27; no. 10; pp. 11 - 14
• Main Author: 钱军 钱勇 柯敏 颜波 程峰 周蜀渝 王育竹
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.10.2010
• Subjects: 交换相互作用; 位操作; 相对能量; 量子位; 量子比特
• ISSN: 0256-307X; 1741-3540
• DOI: 10.1088/0256-307X/27/10/100302

We propose a scheme to implement single-qubit operations for singlet-triplet qubits located in an isolated double-well potential with fixed inter-site tunneling when superexchange interactions predominate. Arbitrary single-qubit gates can be realized by a sequence composed of two elementary operations which can be switched between different parameter regimes by adjusting slightly the relative energy bias of trapped atoms in each sub-well site. The experimental feasibility of the strategy and the fidelity of basic rotation operations are also analyzed.