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dc.contributor.authorMa, Nvsenen_US
dc.contributor.authorSun, Guang-Yuen_US
dc.contributor.authorYou, Yi-Zhuangen_US
dc.contributor.authorXu, Cenkeen_US
dc.contributor.authorVishwanath, Ashvinen_US
dc.contributor.authorSandvik, Anders W.en_US
dc.contributor.authorMeng, Zi Yangen_US
dc.date.accessioned2018-11-27T22:03:05Z
dc.date.available2018-11-27T22:03:05Z
dc.identifier.citationNvsen Ma, Guang-Yu Sun, Yi-Zhuang You, Cenke Xu, Ashvin Vishwanath, Anders W Sandvik, Zi Yang Meng. "Dynamical signature of fractionalization at a deconfined quantum critical point." Physical Review B, Volume 98, Issue 17, https://doi.org/10.1103/physrevb.98.174421
dc.identifier.issn2469-9950
dc.identifier.issn2469-9969
dc.identifier.urihttps://hdl.handle.net/2144/32712
dc.description.abstractDeconfined quantum critical points govern continuous quantum phase transitions at which fractionalized (deconfined) degrees of freedom emerge. Here we study dynamical signatures of the fractionalized excitations in a quantum magnet (the easy-plane J-Q model) that realize a deconfined quantum critical point with emergent O(4) symmetry. By means of large-scale quantum Monte Carlo simulations and stochastic analytic continuation of imaginary-time correlation functions, we obtain the dynamic spin-structure factors in the S x and S z channels. In both channels, we observe broad continua that originate from the deconfined excitations. We further identify several distinct spectral features of the deconfined quantum critical point, including the lower edge of the continuum and its form factor on moving through the Brillouin zone. We provide field-theoretical and lattice model calculations that explain the overall shapes of the computed spectra, which highlight the importance of interactions and gauge fluctuations to explain the spectral-weight distribution. We make further comparisons with the conventional Landau O(2) transition in a different quantum magnet, at which no signatures of fractionalization are observed. The distinctive spectral signatures of the deconfined quantum critical point suggest the feasibility of its experimental detection in neutron scattering and nuclear magnetic resonance experiments.en_US
dc.languageen
dc.publisherAmerican Physical Society (APS)en_US
dc.relation.ispartofPhysical Review B
dc.subjectAntiferromagnetismen_US
dc.subjectStatistical physicsen_US
dc.titleDynamical signature of fractionalization at a deconfined quantum critical pointen_US
dc.typeArticleen_US
dc.description.versionFirst author draften_US
dc.identifier.doi10.1103/physrevb.98.174421
pubs.elements-sourcecrossrefen_US
pubs.notesEmbargo: Not knownen_US
pubs.organisational-groupBoston Universityen_US
pubs.organisational-groupBoston University, College of Arts & Sciencesen_US
pubs.organisational-groupBoston University, College of Arts & Sciences, Department of Physicsen_US
pubs.publication-statusPublished onlineen_US
dc.date.online2018-11-16
dc.identifier.orcid0000-0002-5638-4619 (Sandvik, Anders W)


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