Readout and dynamics of a qubit built on three quantum dots

被引：15

作者：

Luczak, Jakub ^{[1
]}

Bulka, Bogdan R. ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Mol Phys, PL-60179 Poznan, Poland

来源：

PHYSICAL REVIEW B | 2014年 / 90卷 / 16期

关键词：

DECOHERENCE-FREE SUBSPACES; ELECTRON-SPIN; COMPUTATION; TRANSPORT; STATES;

D O I：

10.1103/PhysRevB.90.165427

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a model of a qubit built of three coherently coupled quantum dots with three spins in a triangular geometry. The qubit states are encoded in the doublet subspace and they are controlled by a gate voltage, which breaks the triangular symmetry of the system. We show how to prepare the qubit and to perform one-qubit operations. A doublet blockade effect in the current will be discussed. The blockade is related to an asymmetry of transfer rates from the electrodes to different doublet states and is used to read out the dynamics of the qubit state. Our research also presents analysis of the Rabi oscillations, decoherence, and leakage processes in the doublets subspace.

引用

页数：12

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