Accession Number:

ADA582023

Title:

Digital Control of Exchange Interaction in a Spin-based Silicon Quantum Computer

Descriptive Note:

Final rept. 25 Sep 2009-24 Sep 2013

Corporate Author:

PURDUE UNIV LAFAYETTE IN

Report Date:

2013-05-19

Pagination or Media Count:

49.0

Abstract:

We propose to investigate dc and ac properties of single and double vertical Si quantum dots with 3D confinement. The dots constitute the main building blocks of a scalable flying qubit quantum computer architecture proposed earlier by the PIs. The major advantages of the proposed qubits are digital control of the exchange interaction for two-qubit operations, strong confinement and large energy spacing, and elimination of top gates for electron confinement, which, ideally, will leave only one operational gate per qubit. Reduction of the number of controlling gates will allow arrangement of qubits into a 2D array, which simplifies error correction schemes and reduces correction overhead by an order of magnitude. During the course of the project we also investigated a feasibility of building topologically protected and, thus, inherently fault-tolerant quantum bits. The idea of topologically protected quantum computer requires creation of excitations with non-Abelian statistics. Such excitation are not present in ordinary matter, but can be synthesized in hybrid semiconductor-superconductor structures.

Subject Categories:

  • Quantum Theory and Relativity

Distribution Statement:

APPROVED FOR PUBLIC RELEASE