Dimensional crossover of effective orbital dynamics in polar distorted He 3-A

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Nissinen, J.
dc.contributor.author Volovik, G. E.
dc.date.accessioned 2018-11-09T13:06:53Z
dc.date.available 2018-11-09T13:06:53Z
dc.date.issued 2018-01-25
dc.identifier.citation Nissinen , J & Volovik , G E 2018 , ' Dimensional crossover of effective orbital dynamics in polar distorted He 3-A : Transitions to antispacetime ' Physical Review D , vol 97 , no. 2 , 025018 , pp. 1-9 . DOI: 10.1103/PhysRevD.97.025018 en
dc.identifier.issn 2470-0010
dc.identifier.issn 2470-0029
dc.identifier.other PURE UUID: 82b1bd74-e5f2-4bdc-88a5-5404c10b66ef
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/dimensional-crossover-of-effective-orbital-dynamics-in-polar-distorted-he-3a(82b1bd74-e5f2-4bdc-88a5-5404c10b66ef).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85042098967&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/29223091/PhysRevD.97.025018.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/34624
dc.description | openaire: EC/H2020/694248/EU//TOPVAC
dc.description.abstract Topologically protected superfluid phases of He3 allow one to simulate many important aspects of relativistic quantum field theories and quantum gravity in condensed matter. Here we discuss a topological Lifshitz transition of the effective quantum vacuum in which the determinant of the tetrad field changes sign through a crossing to a vacuum state with a degenerate fermionic metric. Such a transition is realized in polar distorted superfluid He3-A in terms of the effective tetrad fields emerging in the vicinity of the superfluid gap nodes: The tetrads of the Weyl points in the chiral A-phase of He3 and the degenerate tetrad in the vicinity of a Dirac nodal line in the polar phase of He3. The continuous phase transition from the A-phase to the polar phase, i.e., the transition from the Weyl nodes to the Dirac nodal line and back, allows one to follow the behavior of the fermionic and bosonic effective actions when the sign of the tetrad determinant changes, and the effective chiral spacetime transforms to antichiral "anti-spacetime." This condensed matter realization demonstrates that while the original fermionic action is analytic across the transition, the effective action for the orbital degrees of freedom (pseudo-EM) fields and gravity have nonanalytic behavior. In particular, the action for the pseudo-EM field in the vacuum with Weyl fermions (A-phase) contains the modulus of the tetrad determinant. In the vacuum with the degenerate metric (polar phase) the nodal line is effectively a family of 2+1d Dirac fermion patches, which leads to a non-analytic (B2-E2)3/4 QED action in the vicinity of the Dirac line. en
dc.format.extent 1-9
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation info:eu-repo/grantAgreement/EC/H2020/694248/EU//TOPVAC
dc.relation.ispartofseries Physical Review D en
dc.relation.ispartofseries Volume 97, issue 2 en
dc.rights openAccess en
dc.subject.other Physics and Astronomy (miscellaneous) en
dc.subject.other 114 Physical sciences en
dc.title Dimensional crossover of effective orbital dynamics in polar distorted He 3-A en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department ROTA – Topological superfluids
dc.contributor.department Department of Applied Physics
dc.subject.keyword Physics and Astronomy (miscellaneous)
dc.subject.keyword 114 Physical sciences
dc.identifier.urn URN:NBN:fi:aalto-201811095665
dc.identifier.doi 10.1103/PhysRevD.97.025018
dc.type.version publishedVersion

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