Results 51 to 60 of about 228,440 (334)

A Suggestion for Modification of Vafa-Witten Theory [PDF]

, 1995
Using the Mathai-Quillen formalism we reexamine the twisted N=4 supersymmetric model of Vafa-Witten theory. Smooth out the relation between the supersymmetric action and the path integral representation of the Thom class.Comment: Latex, 23kb, no ...
Atiyah, Atiyah, Atiyah, Bott, Cordes, Kalkman, Labastida, Mathai, Pei Wang, Seiberg, Seiberg, Stora, Vafa, Witten, Witten, Witten, Yamron   +16 more
core   +3 more sources

Unveiling Phonon Contributions to Thermal Conductivity and the Applicability of the Wiedemann—Franz Law in Ruthenium and Tungsten Thin Films

Advanced Functional Materials, EarlyView.
Thermal transport in Ru and W thin films is studied using steady‐state thermoreflectance, ultrafast pump–probe spectroscopy, infrared‐visible spectroscopy, and computations. Significant Lorenz number deviations reveal strong phonon contributions, reaching 45% in Ru and 62% in W.
Md. Rafiqul Islam, Pravin Karna, Niraj Bhatt, Sandip Thakur, Helge Heinrich, Daniel M. Hirt, Saman Zare, Christopher Jezewski, Rinus T.P. Lee, Kandabara Tapily, John T. Gaskins, Colin D. Landon, Sean W. King, Ashutosh Giri, Patrick E. Hopkins   +14 more
wiley   +1 more source

Observers seeing gravitational Hilbert spaces: abstract sources for an abstract path integral

Journal of High Energy Physics
The gravitational path integral suggests a striking result: the Hilbert space of closed universes in each superselection sector, a so-called α-sector, is one-dimensional.
Hong Zhe Vincent Chen
doaj   +1 more source

Stochastic Tunneling in de Sitter Spacetime

Universe
Tunneling processes in de Sitter spacetime are studied by using the stochastic approach. We evaluate the Martin–Siggia–Rose–Janssen–de Dominicis (MSRJD) functional integral by using the saddle-point approximation to obtain the tunneling rate.
Taiga Miyachi, Jiro Soda, Junsei Tokuda
doaj   +1 more source

Effective Action in a General Chiral Model: Next to Leading Order Derivative Expansion in the Worldline Method

, 2008
We present a formalism to determine the imaginary part of a general chiral model in the derivative expansion. Our formalism is based on the worldline path integral for the covariant current that can be given in an explicit chiral and gauge covariant form.
Andres Hernandez, Bardeen, Bern, Bern, Bertlmann, D'Hoker, D'Hoker, D'Hoker, Feynman, Feynman, Fliegner, Fliegner, Fliegner, Konstandin, Michael G. Schmidt, Mondragón, Mondragón, Ohnuki, Reuter, Salcedo, Salcedo, Sato, Schmidt, Schmidt, Schmidt, Schwinger, Shifman, Smit, Strassler, Thomas Konstandin, Tranberg, Wess, Witten   +32 more
core   +1 more source

Coordinate-invariant Path Integral Methods in Conformal Field Theory [PDF]

, 2006
We present a coordinate-invariant approach, based on a Pauli-Villars measure, to the definition of the path integral in two-dimensional conformal field theory. We discuss some advantages of this approach compared to the operator formalism and alternative
ANDRÉ VAN TONDER, Di Francesco P., Gawȩdzki K., Gradshteyn I. S., Polchinksi J., Whittaker E. T.   +5 more
core   +1 more source

Fermi Surface Nesting and Anomalous Hall Effect in Magnetically Frustrated Mn2PdIn

Advanced Functional Materials, EarlyView.
Mn2PdIn, a frustrated inverse Heusler alloy, showing electronic‐structure driven anomalous Hall effect with Weyl crossings, Fermi‐surface nesting and near‐zero magnetization ideal for low‐magnetization spintronics. Abstract Noncollinear magnets with near‐zero net magnetization and nontrivial bulk electronic topology hold significant promise for ...
Afsar Ahmed, Arnab Bhattacharya, Prashant Singh, Ajay Kumar, Tukai Singha, Anis Biswas, Yaroslav Mudryk, I. Das   +7 more
wiley   +1 more source

T T ¯ $$ \overline{T} $$ -flow effects on torus partition functions

Journal of High Energy Physics, 2021
In this paper, we investigate the partition functions of conformal field theories (CFTs) with the T T ¯ $$ \overline{T} $$ deformation on a torus in terms of the perturbative QFT approach.
Song He, Yuan Sun, Yu-Xuan Zhang
doaj   +1 more source

Hamiltonian Formalism for Space-time Non-commutative Theories [PDF]

, 2000
Space-time non-commutative theories are non-local in time. We develop the Hamiltonian formalism for non-local field theories in d space-time dimensions by considering auxiliary d+1 dimensional field theories which are local with respect to the evolution ...
A. D. Fokker, A. Pais, C. Batlle, D. A. Eliezer, J. Gomis, J. L. F. Barbon, J. Llosa, Joaquim Gomis, Josep Llosa, Kiyoshi Kamimura, L. D. Faddeev, M. Ostrogradski, N. Seiberg, N. Seiberg, N. Seiberg, O. Aharony, P. Kristensen, P. Senjanovic, P. Senjanovic, R. Gopakumar, R. Gopakumar, R. Marnelius, R. P. Woodard   +22 more
core   +4 more sources

Magnetic and Structural Response Tuned by Coexisting Mn Concentration‐Dependent Phases in MnBi2Te4 Thin Film Grown on GaAs(001) by Molecular Beam Epitaxy

Advanced Functional Materials, EarlyView.
The study explores structural and magnetic properties of one of the most recent topological quantum materials (MnBi2Te4). The Mn‐poor structure leads to stacking faults (quintuple layer ‐ QL of Bi2Te3 formation instead of a septuple layer ‐ SL of MnBi2Te4), resulting in a coexistence between weak antiferromagnetism and ferromagnetism.
Wesley F. Inoch, Sergio L. A. Mello, Gilberto Rodrigues‐Junior, Sukarno O. Ferreira, Marcelo M. Sant'Anna, Benjamin R. Salles, Mateus T. Souza, Sérgio L. Morelhão, Maybi F. Sampaio, Bráulio S. Archanjo, Leonarde N. Rodrigues   +10 more
wiley   +1 more source