Results 11 to 20 of about 51,886 (188)

Observation of Berry curvature in non-Hermitian system from far-field radiation [PDF]

Nature Communications
Berry curvature that describes local geometrical properties of energy bands can elucidate many fascinating phenomena in solid-state, photonic, and phononic systems, given its connection to global topological invariants such as the Chern number.
Xuefan Yin, Ye Chen, Xiaoyu Zhang, Zixuan Zhang, Susumu Noda, Chao Peng   +5 more
doaj   +2 more sources

Chern-Simons theory and BCS superconductivity [PDF]

, 2001
We study the relationship between the holomorphic unitary connection of Chern-Simons theory with temporal Wilson lines and the Richardson's exact solution of the reduced BCS Hamiltonian.
Amico, Amico, Amico, Axelrod, Babujian, Babujian, Bardeen, Bernard, Bershadsky, Cambiaggio, Delft, di Francesco, Dotsenko, Dotsenko, Dukelsky, Dukelsky, Etingof, Etingof, Falceto, Falceto, Falceto, Felder, Felder, Fernando Falceto, Fetter, Gaudin, Gawedzki, Germán Sierra, Girvin, Girvin, Kalmeyer, Knizhnik, Korepin, Labastida, Laughlin, Laughlin, Manuel Asorey, Ralph, Ralph, Richardson, Richardson, Richardson, Richardson, Ring, Sierra, Sklyanin, van Geemen, von Delft, Witten, Zhang, Zhou   +50 more
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Chiral And Parity Anomalies At Finite Temperature And Density [PDF]

, 1997
Two closely related topological phenomena are studied at finite density and temperature. These are chiral anomaly and Chern-Simons term. By using different methods it is shown that $\mu^2 = m^2$ is the crucial point for Chern-Simons at zero temperature ...
A.N. Sissakian, Alvarez-Gaumé, Brown, Chodos, Gomez Nicola, Jackiw, Johnson, Lykken, Lykken, Lykken, Niemi, Niemi, Niemi, O.Yu. Shevchenko, Redlich, Redlich, Rubakov, Rubakov, Rutherford, S.B. Solganik, Schakel, Schwinger, Schwinger, Shuryak, Sissakian, Tsokos, Zeitlin   +26 more
core   +3 more sources

On the Kähler-likeness on almost Hermitian manifolds

Complex Manifolds, 2019
We define a Kähler-like almost Hermitian metric. We will prove that on a compact Kähler-like almost Hermitian manifold (M2n, J, g), if it admits a positive ∂ ̄∂-closed (n − 2, n − 2)-form, then g is a quasi-Kähler metric.
Kawamura Masaya
doaj   +1 more source

Synthetic flux attachment

Physical Review Research, 2020
Topological field theories emerge at low energy in strongly correlated condensed matter systems and appear in the context of planar gravity. In particular, the study of Chern-Simons terms gives rise to the concept of flux attachment when the gauge field ...
Gerard Valentí-Rojas, Niclas Westerberg, Patrik Öhberg   +2 more
doaj   +1 more source

Higher-group symmetries and weak gravity conjecture mixing

Journal of High Energy Physics, 2022
In four-dimensional axion electrodynamics, a Chern-Simons coupling of the form θF ^ F leads to a higher-group global symmetry between background gauge fields.
Sami Kaya, Tom Rudelius
doaj   +1 more source

Gauss Law Constraints in Chern-Simons Theory From BRST Quantization [PDF]

, 1996
The physical state condition in the BRST quantization of Chern-Simons field theory is used to derive Gauss law constraints in the presence of Wilson loops, which play an important role in explicitly establishing the connection of Chern-Simons field ...
Alvarez-Gaumé, Bos, Dirac, Elitzur, Gepner, Ginsparg, Guadagnini, Guadagnini, Henneaux, Horne, Kaul, Knizhnik, Kugo, Labastida, Labastida, Labastida, M. Chaichian, Marnelius, Moore, Rozansky, van de Wetering, W.F. Chen, Witten, Z.Y. Zhu   +23 more
core   +4 more sources

S-duality resurgence in SL(2) Chern-Simons theory

Journal of High Energy Physics, 2018
We find that an S-duality in SL(2) Chern-Simons theory for hyperbolic 3-manifolds emerges by the Borel resummation of a semiclassical expansion around a particular flat connection associated to the hyperbolic structure. We demonstrate it numerically with
Dongmin Gang, Yasuyuki Hatsuda
doaj   +1 more source

Higher-order topological insulators, topological pumps and the quantum Hall effect in high dimensions

Physical Review Research, 2020
Topological insulators are materials with spectral bands associated with an integer-valued index, manifesting through quantized bulk phenomena and robust boundary effects.
Ioannis Petrides, Oded Zilberberg
doaj   +1 more source

Measuring topology from dynamics by obtaining the Chern number from a linking number

Nature Communications, 2019
The connection between the topological properties of the ground state and non-equilibrium dynamics remains obscure. Here, Tarnowski et al. define and measure a linking number between static and dynamical vortices, which directly corresponds to the ground-
Matthias Tarnowski, F. Nur Ünal, Nick Fläschner, Benno S. Rem, André Eckardt, Klaus Sengstock, Christof Weitenberg   +6 more
doaj   +1 more source