Symmetry-protected adiabatic quantum transistors

Autor(en)

Dominic J. Williamson, Stephen D. Bartlett

Abstrakt

Adiabatic quantum transistors (AQT) allow quantum logic gates to be performed by applying a large field to a quantum many-body system prepared in its ground state, without the need for local control. The basic operation of such a device can be viewed as driving a spin chain from a symmetry-protected (SP) phase to a trivial phase. This perspective offers an avenue to generalize theAQTand to design several improvements. The performance of quantum logic gates is shown to depend only on universal symmetry properties of a SP phase rather than any fine tuning of the Hamiltonian, and it is possible to implement a universal set of logic gates in this way by combining several different types of SP matter. Such SP AQTs are argued to be robust to a range of relevant noise processes.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

The University of Sydney

Journal

New Journal of Physics

Band

17

Anzahl der Seiten

24

ISSN

1367-2630

DOI

https://doi.org/10.1088/1367-2630/17/5/053019

Publikationsdatum

05-2015

Peer-reviewed

Ja

ÖFOS 2012

103024 Quantenfeldtheorie, 103025 Quantenmechanik

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/6192bb3a-a01d-4860-82e7-427184b88418