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154 papers · 1 filter
Chern-Simons 5-form and Holographic Baryons
Pak Hang Chris Lau, Shigeki Sugimoto
In the top-down holographic model of QCD based on D4/D8-branes in type IIA string theory and some of the bottom up models, the low energy effective theory of mesons is described by…
Vacuum State of the Dirac Field in de Sitter Space and Entanglement Entropy
Sugumi Kanno, Misao Sasaki, Takahiro Tanaka
We compute the entanglement entropy of a free massive Dirac field between two causally disconnected open charts in de Sitter space. We first derive the Bunch-Davies vacuum mode fun…
Double Field Theory at SL(2) angles
Franz Ciceri, Giuseppe Dibitetto, J. J. Fernandez-Melgarejo +2
An extended field theory is presented that captures the full SL(2) x O(6,6+n) duality group of four-dimensional half-maximal supergravities. The theory has section constraints whos…
GW150914-like Black Holes as Galactic High-Energy Sources
Kunihito Ioka, Tatsuya Matsumoto, Yuto Teraki +2
The first direct detections of gravitational waves (GWs) from black hole (BH) mergers, GW150914, GW151226 and LVT151012, give a robust lower limit on the number of mer…
Discontinuous change of shear modulus for frictional jammed granular materials
Michio Otsuki, Hisao Hayakawa
The shear modulus of jammed frictional granular materials with the harmonic repulsive interaction under an oscillatory shear is numerically investigated. It is confirmed that the s…
Stable solutions of inflation driven by vector fields
Razieh Emami, Shinji Mukohyama, Ryo Namba +1
Many models of inflation driven by vector fields alone have been known to be plagued by pathological behaviors, namely ghost and/or gradient instabilities. In this work, we seek a…