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The influence of dissipation in a 1D quantum metamaterial

journal contribution
posted on 08.08.2013, 07:19 by Richard D. Wilson, Mark Everitt, Sergey Saveliev, Alexandre Zagoskin
Quantum metamaterials consist of quantum coherent structures made up of artificial atoms connected by a transmission medium. In this work we investigate the effects of decoherence in both the transmission medium and the artificial atom using a fully quantum mechanical model. We consider a prototypical solid state 1D quantum metamaterial, i.e. a superconducting flux qubit coupled to a transmission line section on resonance. An initially excited qubit is found to effectively pump a propagating coherent pulse and increase the average output power of the transmission line. Evidence of entanglement between the qubit and the transmission line with a propagating coherent pulse is also demonstrated. This signature behaviour is found to still be evident when a level of decoherence in line with that found in typical experiments is introduced into the transmission line section as well as the qubit. Increasing levels of decoherence, particularly in the qubit, are shown to be dangerous as they destroy the quantum correlations between the qubit and the propagating field.

History

School

  • Science

Department

  • Physics

Citation

WILSON, R.D. ... et al, 2013. The influence of dissipation in a 1D quantum metamaterial. Superconductor Science and Technology, 26 (084005), 8pp.

Publisher

© IOP Publishing

Version

VoR (Version of Record)

Publication date

2013

Notes

This article is closed access.

ISSN

0953-2048

eISSN

1361-6668

Language

en

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