Two-electron quantum dots as scalable qubits

Details Two-electron quantum dots as scalable qubits Two-electron quantum dots as scalable qubits

2002-06-12

arxiv.org/abs/quant-ph/0206075v2

Physics

Quantum Physics

Revised version, accepted by PRA

Scientific paper

10.1103/PhysRevA.66.042328

We show that two electrons confined in a square semiconductor quantum dot have two isolated low-lying energy eigenstates, which have the potential to form the basis of scalable computing elements (qubits). Initialisation, one-qubit and two-qubit universal gates, and readout are performed using electrostatic gates and magnetic fields. Two-qubit transformations are performed via the Coulomb interaction between electrons on adjacent dots. Choice of initial states and subsequent asymmetric tuning of the tunnelling energy parameters on adjacent dots control the effect of this interaction.

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