Results 31 to 40 of about 185,900 (293)

Gapped boundaries and string-like excitations in (3+1)d gauge models of topological phases

open access: yesJournal of High Energy Physics, 2021
We study lattice Hamiltonian realisations of (3+1)d Dijkgraaf-Witten theory with gapped boundaries. In addition to the bulk loop-like excitations, the Hamiltonian yields bulk dyonic string-like excitations that terminate at gapped boundaries.
Alex Bullivant, Clement Delcamp
doaj   +1 more source

Principles of topology in understanding and development of topological states of matter [PDF]

open access: yesIranian Journal of Physics Research, 2020
در دهه‌های اخیر فیزیکدانان مادة چگال با به‌‌کار بردن مفاهیم توپولوژی توسعه داده شده در ریاضی و مکانیک کوانتومی و درک ارتباط عمیق آنها، حالت‌های جدیدی از مواد را کشف کرده و الگوهایی برای طبقه‌بندی فازهای مواد ارائه داده‌اند. این موضوع حتی دانش شیمی مربوط به اوربیتال‌ها و پیوندهای اتمی و همچنین علم توسعة مواد با خواص مورد انتظار را دگرگون کرده است.
openaire   +1 more source

Quantum anomalous Hall effect in magnetic topological insulators

open access: yes, 2015
The search for topologically non-trivial states of matter has become an important goal for condensed matter physics. Here, we give a theoretical introduction to the quantum anomalous Hall (QAH) effect based on magnetic topological insulators in two ...
Lian, Biao   +2 more
core   +1 more source

Topological Anderson Insulator in Three Dimensions [PDF]

open access: yes, 2010
Disorder, ubiquitously present in solids, is normally detrimental to the stability of ordered states of matter. In this letter we demonstrate that not only is the physics of a strong topological insulator robust to disorder but, remarkably, under certain
Franz, M.   +3 more
core   +2 more sources

From the adiabatic theorem of quantum mechanics to topological states of matter [PDF]

open access: yesphysica status solidi (RRL) – Rapid Research Letters, 2013
Abstractmagnified imageOwing to the enormous interest the rapidly growing field of topological states of matter (TSM) has attracted in recent years, the main focus of this review is on the theoretical foundations of TSM. Starting from the adiabatic theorem of quantum mechanics which we present from a geometrical perspective, the concept of TSM is ...
Budich, Jan Carl, Trauzettel, Björn
openaire   +3 more sources

Microwave studies of the fractional Josephson effect in HgTe-based Josephson junctions

open access: yes, 2018
The rise of topological phases of matter is strongly connected to their potential to host Majorana bound states, a powerful ingredient in the search for a robust, topologically protected, quantum information processing. In order to produce such states, a
A Cecco De   +93 more
core   +1 more source

TOPOLOGICAL STATES OF MATTER AND NONCOMMUTATIVE GEOMETRY [PDF]

open access: yesBulletin of the Australian Mathematical Society, 2016
This thesis examines topological states of matter from the perspective of noncommutative geometry and KK-theory. Examples of such topological states of matter include the quantum Hall effect and topological insulators. For the quantum Hall effect, we consider a continuous model and show that the Hall conductance can be expressed in terms of the index ...
openaire   +1 more source

Boundary Hamiltonian theory for gapped topological phases on an open surface

open access: yesJournal of High Energy Physics, 2018
In this paper we propose a Hamiltonian approach to gapped topological phases on open surfaces. Our setting is an extension of the Levin-Wen model to a 2d graph on an open surface, whose boundary is part of the graph.
Yuting Hu   +4 more
doaj   +1 more source

Electronic properties of SnTe-class topological crystalline insulator materials

open access: yes, 2016
The rise of topological insulators in recent years has broken new ground both in the conceptual cognition of condensed matter physics and the promising revolution of the electronic devices.
Duan, Wenhui   +3 more
core   +1 more source

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