Coherent spin manipulation in an exchange-only qubit

Laird, E A and Taylor, J M and DiVincenzo, DP and Marcus, C M and Hanson, M P and Gossard, A C (2010) Coherent spin manipulation in an exchange-only qubit. Physical review B, 82 (7). ISSN 1098-0121

Full text not available from this repository.

Abstract

Initialization, two-spin coherent manipulation, and readout of a three-spin qubit are demonstrated using a few-electron triple quantum dot. The three-spin qubit is designed to allow all operations for full qubit control to be tuned via nearest-neighbor exchange interaction. Fast readout of charge states takes advantage of multiplexed reflectometry. Decoherence measured in a two-spin subspace is found to be consistent with predictions based on gate voltage noise with a uniform power spectrum. The theory of the exchange-only qubit is developed and it is shown that initialization of only two spins suffices for operation. Requirements for full multiqubit control using only exchange and electrostatic interactions are outlined.

Item Type:
Journal Article
Journal or Publication Title:
Physical review B
ID Code:
124375
Deposited By:
Deposited On:
04 Apr 2018 10:56
Refereed?:
Yes
Published?:
Published
Last Modified:
23 Sep 2020 04:12