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- Publisher Website: 10.1038/s41467-021-25707-z
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- PMID: 34504099
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Article: Fractionalized conductivity and emergent self-duality near topological phase transitions
Title | Fractionalized conductivity and emergent self-duality near topological phase transitions |
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Authors | |
Issue Date | 2021 |
Publisher | Nature Research: Fully open access journals. The Journal's web site is located at http://www.nature.com/ncomms/index.html |
Citation | Nature Communications, 2021, v. 12, p. article no. 5347 How to Cite? |
Abstract | The experimental discovery of the fractional Hall conductivity in two-dimensional electron gases revealed new types of quantum particles, called anyons, which are beyond bosons and fermions as they possess fractionalized exchange statistics. These anyons are usually studied deep inside an insulating topological phase. It is natural to ask whether such fractionalization can be detected more broadly, say near a phase transition from a conventional to a topological phase. To answer this question, we study a strongly correlated quantum phase transition between a topological state, called a Z2 quantum spin liquid, and a conventional superfluid using large-scale quantum Monte Carlo simulations. Our results show that the universal conductivity at the quantum critical point becomes a simple fraction of its value at the conventional insulator-to-superfluid transition. Moreover, a dynamically self-dual optical conductivity emerges at low temperatures above the transition point, indicating the presence of the elusive vison particles. Our study opens the door for the experimental detection of anyons in a broader regime, and has ramifications in the study of quantum materials, programmable quantum simulators, and ultra-cold atomic gases. In the latter case, we discuss the feasibility of measurements in optical lattices using current techniques. |
Persistent Identifier | http://hdl.handle.net/10722/305027 |
ISSN | 2023 Impact Factor: 14.7 2023 SCImago Journal Rankings: 4.887 |
PubMed Central ID | |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Wang, YC | - |
dc.contributor.author | Cheng, M | - |
dc.contributor.author | Witczak-Krempa, W | - |
dc.contributor.author | Meng, ZY | - |
dc.date.accessioned | 2021-10-05T02:38:42Z | - |
dc.date.available | 2021-10-05T02:38:42Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Nature Communications, 2021, v. 12, p. article no. 5347 | - |
dc.identifier.issn | 2041-1723 | - |
dc.identifier.uri | http://hdl.handle.net/10722/305027 | - |
dc.description.abstract | The experimental discovery of the fractional Hall conductivity in two-dimensional electron gases revealed new types of quantum particles, called anyons, which are beyond bosons and fermions as they possess fractionalized exchange statistics. These anyons are usually studied deep inside an insulating topological phase. It is natural to ask whether such fractionalization can be detected more broadly, say near a phase transition from a conventional to a topological phase. To answer this question, we study a strongly correlated quantum phase transition between a topological state, called a Z2 quantum spin liquid, and a conventional superfluid using large-scale quantum Monte Carlo simulations. Our results show that the universal conductivity at the quantum critical point becomes a simple fraction of its value at the conventional insulator-to-superfluid transition. Moreover, a dynamically self-dual optical conductivity emerges at low temperatures above the transition point, indicating the presence of the elusive vison particles. Our study opens the door for the experimental detection of anyons in a broader regime, and has ramifications in the study of quantum materials, programmable quantum simulators, and ultra-cold atomic gases. In the latter case, we discuss the feasibility of measurements in optical lattices using current techniques. | - |
dc.language | eng | - |
dc.publisher | Nature Research: Fully open access journals. The Journal's web site is located at http://www.nature.com/ncomms/index.html | - |
dc.relation.ispartof | Nature Communications | - |
dc.rights | Nature Communications. Copyright © Nature Research: Fully open access journals. | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.title | Fractionalized conductivity and emergent self-duality near topological phase transitions | - |
dc.type | Article | - |
dc.identifier.email | Meng, ZY: zymeng@hku.hk | - |
dc.identifier.authority | Meng, ZY=rp02524 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1038/s41467-021-25707-z | - |
dc.identifier.pmid | 34504099 | - |
dc.identifier.pmcid | PMC8429463 | - |
dc.identifier.scopus | eid_2-s2.0-85114777100 | - |
dc.identifier.hkuros | 325744 | - |
dc.identifier.volume | 12 | - |
dc.identifier.spage | article no. 5347 | - |
dc.identifier.epage | article no. 5347 | - |
dc.identifier.isi | WOS:000695204000017 | - |
dc.publisher.place | United Kingdom | - |