scholarly journals Topologically Protected Wormholes in Type-III Weyl Semimetal Co3In2X2 (X = S, Se)

2021 ◽  
Vol 6 (2) ◽  
pp. 18
Author(s):  
Christopher Sims
Keyword(s):  
Particle Physics ◽  
Condensed Matter ◽  
Ideal Type ◽  
Condensed Matter Physics ◽  
Type Iii ◽  
Weyl Semimetal ◽  
Topological Quantum ◽  
Weyl Semimetals ◽  
Quantum Materials

The observation of wormholes has proven to be difficult in the field of astrophysics. However, with the discovery of novel topological quantum materials, it is possible to observe astrophysical and particle physics effects in condensed matter physics. It is proposed in this work that wormholes can exist in a type-III Weyl phase. In addition, these wormholes are topologically protected, making them feasible to create and measure in condensed matter systems. Finally, Co3In2X2 (X = S, Se) are identified as ideal type-III Weyl semimetals and experiments are put forward to confirm the existence of a type-III Weyl phase.

Majorana fermions in condensed-matter physics

2016 ◽  
Vol 30 (19) ◽  
pp. 1630012 ◽  
Author(s):  
A. J. Leggett
Keyword(s):  
Quantum Computing ◽  
Current Literature ◽  
Particle Physics ◽  
Condensed Matter ◽  
Broken Symmetry ◽  
Majorana Fermions ◽  
Condensed Matter Physics ◽  
Late Professor ◽  
Topological Quantum ◽  
Abdus Salam

It is an honor and a pleasure to have been invited to give a talk in this conference celebrating the memory of the late Professor Abdus Salam. To my regret, I did not know Professor Salam personally, but I am very aware of his work and of his impact on my area of specialization, condensed matter physics, both intellectually through his ideas on spontaneously broken symmetry and more practically through his foundation of the ICTP. Since I assume that most of this audience are not specialized in condensed-matter physics, I thought I would talk about one topic which to some extent bridges this field and the particle-physics interests of Salam, namely Majorana fermions (M.F.s). However, as we shall see, the parallels which are often drawn in the current literature may be a bit too simplistic. I will devote most of this talk to a stripped-down exposition of the current orthodoxy concerning M.F.s. in condensed-matter physics and their possible applications to topological quantum computing (TQC), and then at the end briefly indicate why I believe this orthodoxy may be seriously misleading.

Physics research in Israel—A preliminary bibliometric analysis

1984 ◽  
Vol 8 (5) ◽  
pp. 185-195 ◽  
Author(s):  
Subbiah Arunachalam ◽  
M.K. Dhirendra Rao ◽  
Praveen K. Shrivastava
Keyword(s):  
Particle Physics ◽  
Nuclear Physics ◽  
Condensed Matter ◽  
The United States ◽  
High Impact ◽  
Impact Factors ◽  
Condensed Matter Physics ◽  
Molecular Physics ◽  
Atomic And Molecular Physics ◽  
The Impact

The impact of physics research carried out in Israel on the international literature is assessed from data on publication and citation counts. We have considered in this analysis all papers published from Israel and covered under six of the ten major sections of INSPEC's Physics Abstracts, January-June 1977 (covering condensed matter physics, nuclear and particle physics, atomic and molecular physics and biophysics and physical chemistry) as well as citations to these papers as seen from five annual editions of Science Citation Index, 1977-1981. An analysis of these data permits us to identify: (i) areas of research in which Israel is strong, (ii) highly cited publications, (iii) the distribution of citations over the years, and (iv) how quickly the papers get cited. Israel accounts for less than 1% of the world's physics publications, but undeniably physics done in Israel is an integral part of the mainstream of world physics. Israeli physicists place almost all their work in foreign journals, most of them published from the United States, the Nether lands and the United Kingdom. Many of these journals have a good standing as seen from their high impact factors and immediacy indices. Nearly all papers in our sample have originated in eight institutions, indicating that Israel is free from the common Third World malady of spreading the butter of R&D budget too thinly. Overall, Israeli physics appears to be productive in condensed matter physics, nuclear physics and atomic and molecular physics. However, chemical physics tops the list if one considers both the number of papers published and the cognitive impact these papers have had. Two areas where Israel did not publish much and yet had a few publica tions of high impact are: (i) special theories, interaction models and particle systematics, and (ii) biophysics. Surprisingly for a nation interested in both the military and civilian applications of nuclear energy, Israel's publications in nuclear physics are not as well cited as her publications in many other subfields of physics.

Angle-Resolved Photoemission Spectroscopy Study of Topological Quantum Materials

2020 ◽  
Vol 50 (1) ◽  
pp. 131-153
Author(s):  
Chaofan Zhang ◽  
Yiwei Li ◽  
Ding Pei ◽  
Zhongkai Liu ◽  
Yulin Chen
Keyword(s):  
Electronic Structures ◽  
Photoemission Spectroscopy ◽  
Topological Invariants ◽  
New Materials ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Topological Quantum ◽  
Experimental Tool ◽  
Weyl Semimetals ◽  
Quantum Materials ◽  
Physical Phenomena

The recently discovered topological quantum materials (TQMs) have electronic structures that can be characterized by certain topological invariants. In these novel materials, the unusual bulk and surface electrons not only give rise to many exotic physical phenomena but also foster potential new technological applications. To characterize the unusual electronic structures of these new materials, investigators have used angle-resolved photoemission spectroscopy (ARPES) as an effective experimental tool to directly visualize the unique bulk and surface electronic structures of TQMs. In this review, we first give a brief introduction of TQMs and ARPES, which is followed by examples of the application of ARPES to different TQMs ranging from topological insulators to Dirac and Weyl semimetals. We conclude with a brief perspective of the current development of ARPES and its potential application in the study of TQMs.

FROM BCS TO THE LHC

2008 ◽  
Vol 23 (11) ◽  
pp. 1627-1635 ◽  
Author(s):  
STEVEN WEINBERG
Keyword(s):  
Symmetry Breaking ◽  
Spontaneous Symmetry Breaking ◽  
Particle Physics ◽  
Condensed Matter ◽  
50Th Anniversary ◽  
Condensed Matter Physics ◽  
University Of Illinois ◽  
The University ◽  
Theory Of Superconductivity

Reflections on spontaneous symmetry breaking, and the connection between condensed matter physics and particle physics, as given in a talk at a symposium at the University of Illinois in Urbana, celebrating the 50th anniversary of the theory of superconductivity.

scholarly journals Symmetry breaking and the deconstruction of mass

2015 ◽  
Vol 373 (2032) ◽  
pp. 20140034 ◽  
Author(s):  
Luis Álvarez-Gaumé
Keyword(s):  
Symmetry Breaking ◽  
Particle Physics ◽  
Condensed Matter ◽  
Current Understanding ◽  
Condensed Matter Physics

We briefly review some of the connections between symmetry breaking in condensed matter physics and in particle physics, assisting, in particular, our current understanding of the origin of mass.

scholarly journals The chiral anomaly, Dirac and Weyl semimetals, and force-free magnetic fields

2017 ◽  
Vol 95 (8) ◽  
pp. 711-714
Author(s):  
Gerald E. Marsh
Keyword(s):  
Magnetic Fields ◽  
Condensed Matter ◽  
Relaxation Times ◽  
Chiral Anomaly ◽  
Quantum Mechanical ◽  
Condensed Matter Physics ◽  
Macroscopic Appearance ◽  
Weyl Semimetals ◽  
Current Relaxation

The chiral anomaly is a purely quantum mechanical phenomenon that has a long history dating back to the late 1960s. Surprisingly, it has recently made a macroscopic appearance in condensed matter physics. A brief introduction to the relevant features of this anomaly is given and it is shown that its appearance in condensed matter systems must involve force-free magnetic fields, which may help explain the long current relaxation times in Dirac and Weyl semimetals.

scholarly journals Intrinsic magnetic topological insulators in van der Waals layered MnBi2Te4-family materials

2019 ◽  
Vol 5 (6) ◽  
pp. eaaw5685 ◽  
Author(s):  
Jiaheng Li ◽  
Yang Li ◽  
Shiqiao Du ◽  
Zun Wang ◽  
Bing-Lin Gu ◽  
...  
Keyword(s):  
Quantum Physics ◽  
Condensed Matter ◽  
Van Der Waals ◽  
Exchange Interactions ◽  
New Physics ◽  
Future Research ◽  
Majorana Fermions ◽  
Weyl Semimetal ◽  
Topological Quantum ◽  
Physical Effects

The interplay of magnetism and topology is a key research subject in condensed matter physics, which offers great opportunities to explore emerging new physics, such as the quantum anomalous Hall (QAH) effect, axion electrodynamics, and Majorana fermions. However, these exotic physical effects have rarely been realized experimentally because of the lack of suitable working materials. Here, we predict a series of van der Waals layered MnBi2Te4-related materials that show intralayer ferromagnetic and interlayer antiferromagnetic exchange interactions. We find extremely rich topological quantum states with outstanding characteristics in MnBi2Te4, including an antiferromagnetic topological insulator with the long-sought topological axion states on the surface, a type II magnetic Weyl semimetal with one pair of Weyl points, as well as a collection of intrinsic axion insulators and QAH insulators in even- and odd-layer films, respectively. These notable predictions, if proven experimentally, could profoundly change future research and technology of topological quantum physics.

scholarly journals Beauty and physics: 13 important contributions of Chen Ning Yang

2014 ◽  
Vol 29 (17) ◽  
pp. 1475001 ◽  
Author(s):  
Yu Shi
Keyword(s):  
Field Theory ◽  
Statistical Mechanics ◽  
Particle Physics ◽  
Condensed Matter ◽  
Condensed Matter Physics ◽  
90Th Birthday ◽  
Chen Ning Yang

In 2012, Chen Ning Yang received a 90th birthday gift in the form of a black cube inscribed with his 13 most important contributions, which cover four major areas of physics: statistical mechanics, condensed matter physics, particle physics and field theory. We briefly describe these 13 contributions and make general comments about Yang's distinctive style as a trailblazing leader in research.

scholarly journals Topological semimetal in honeycomb lattice LnSI

2017 ◽  
Vol 114 (40) ◽  
pp. 10596-10600 ◽  
Author(s):  
Simin Nie ◽  
Gang Xu ◽  
Fritz B. Prinz ◽  
Shou-cheng Zhang
Keyword(s):  
Condensed Matter ◽  
Surface States ◽  
Nodal Line ◽  
Honeycomb Lattice ◽  
Nodal Lines ◽  
Weyl Semimetal ◽  
The Standard Model ◽  
Weyl Semimetals ◽  
Topological Semimetals ◽  
The Right

Recognized as elementary particles in the standard model, Weyl fermions in condensed matter have received growing attention. However, most of the previously reported Weyl semimetals exhibit rather complicated electronic structures that, in turn, may have raised questions regarding the underlying physics. Here, we report promising topological phases that can be realized in specific honeycomb lattices, including ideal Weyl semimetal structures, 3D strong topological insulators, and nodal-line semimetal configurations. In particular, we highlight a semimetal featuring both Weyl nodes and nodal lines. Guided by this model, we showed that GdSI, the long-perceived ideal Weyl semimetal, has two pairs of Weyl nodes residing at the Fermi level and that LuSI (YSI) is a 3D strong topological insulator with the right-handed helical surface states. Our work provides a mechanism to study topological semimetals and proposes a platform for exploring the physics of Weyl semimetals as well as related device designs.

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