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dc.contributor.author
Winkler, Georg W.
dc.contributor.author
Ganahl, M.
dc.contributor.author
Schuricht, D.
dc.contributor.author
Evertz, H.G.
dc.contributor.author
Andergassen, S.
dc.date.accessioned
2017-11-20T15:45:03Z
dc.date.available
2017-10-06T03:34:04Z
dc.date.available
2017-11-20T15:23:39Z
dc.date.available
2017-11-20T15:45:03Z
dc.date.issued
2017-06
dc.identifier.issn
1367-2630
dc.identifier.other
10.1088/1367-2630/aa7027
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/191714
dc.identifier.doi
10.3929/ethz-b-000191714
dc.description.abstract
We investigate the effect of strong interactions on the spectral properties of quantum wires with strong Rashba spin–orbit (SO) interaction in a magnetic field, using a combination of matrix product state and bosonization techniques. Quantum wires with strong Rashba SO interaction and magnetic field exhibit a partial gap in one-half of the conducting modes. Such systems have attracted wide-spread experimental and theoretical attention due to their unusual physical properties, among which are spin-dependent transport, or a topological superconducting phase when under the proximity effect of an s-wave superconductor. As a microscopic model for the quantum wire we study an extended Hubbard model with SO interaction and Zeeman field. We obtain spin resolved spectral densities from the real-time evolution of excitations, and calculate the phase diagram. We find that interactions increase the pseudo gap at k = 0 and thus also enhance the Majorana-supporting phase and stabilize the helical spin order. Furthermore, we calculate the optical conductivity and compare it with the low energy spiral Luttinger liquid result, obtained from field theoretical calculations. With interactions, the optical conductivity is dominated by an excotic excitation of a bound soliton–antisoliton pair known as a breather state. We visualize the oscillating motion of the breather state, which could provide the route to their experimental detection in e.g. cold atom experiments.
en_US
dc.language.iso
en
en_US
dc.publisher
Institute of Physics Publishing Ltd.
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.subject
DMRG
en_US
dc.subject
matrix product states
en_US
dc.subject
spin-orbit interaction
en_US
dc.subject
Luttinger liquid
en_US
dc.subject
bosonization
en_US
dc.subject
Majorana
en_US
dc.subject
strong correlations
en_US
dc.title
Interaction effects in a microscopic quantum wire model with strong spin-orbit interaction
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2017-06-05
ethz.journal.title
New Journal of Physics
ethz.journal.volume
19
en_US
ethz.journal.abbreviated
New j. phys.
ethz.pages.start
063009
en_US
ethz.size
16 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Bristol
en_US
ethz.publication.status
published
en_US
ethz.relation.isNewVersionOf
20.500.11850/126094
ethz.date.deposited
2017-10-06T03:34:17Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-11-20T15:23:55Z
ethz.rosetta.lastUpdated
2018-08-03T02:44:09Z
ethz.rosetta.versionExported
true
ethz.COinS
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