edoc

Microwave-controlled coupling of Majorana bound states

Schmidt, Thomas L. and Nunnenkamp, Andreas and Bruder, Christoph. (2013) Microwave-controlled coupling of Majorana bound states. New journal of physics, Vol. 15 , 025043.

Full text not available from this repository.

Official URL: http://edoc.unibas.ch/dok/A6223225

Downloads: Statistics Overview

Abstract

We propose microwave-controlled rotations for qubits realized as Majorana bound states. To this end, we study an inhomogeneous Kitaev chain in a microwave cavity. The chain consists of two topologically nontrivial regions separated by a topologically trivial, gapped region. The Majorana bound states at the interfaces between the left (right) regions and the central region are coupled, and their energies are split by virtual cotunneling processes. The amplitude for these cotunneling processes decreases exponentially with the number of sites of the gapped region, and the decay length diverges as the gap of the topologically trivial region closes. We demonstrate that microwave radiation can exponentially enhance the coupling between the Majorana bound states, both for classical and quantized electric fields. By solving the appropriate Liouville equation numerically, we show that microwaves can drive Rabi oscillations in the Majorana sector. Our model emerges as an effective description of a topological semiconductor nanowire in a microwave cavity. Thus, our proposal provides an experimentally feasible way to obtain full single-qubit control necessary for universal quantum computation with Majorana qubits.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik (Bruder)
UniBasel Contributors:Bruder, Christoph and Nunnenkamp, Andreas and Schmidt, Thomas
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:IOP Publishing
ISSN:1367-2630
Note:Publication type according to Uni Basel Research Database: Journal article
Related URLs:
Identification Number:
Last Modified:27 Feb 2014 15:46
Deposited On:27 Feb 2014 15:46

Repository Staff Only: item control page