The Berry phase rectification tensor and the solar rectification vector [PDF]
Journal of Physics D: Applied Physics, 2020 We introduce an operational definition of the Berry Phase Rectification Tensor as the second order change of polarization of a material in response to an ideal short pulse of electric field. Under time reversal symmetry this tensor depends exclusively on
O. Matsyshyn +3 more
semanticscholar +1 more source
A novel definition of complexity in torsion based theory
The European Physical Journal C, 2022 Despite coming across quite effective definitions of complexity in terms of many modified theories of gravity, it still has a question about its existence in f(T) gravity, where the torsion scalar T is accountable for gravitational impacts. The emergence
M. Z. Bhatti, Z. Yousaf, S. Hanif
semanticscholar +1 more source
Self-accelerated Universe Induced by Repulsive Effects as an Alternative to Dark Energy and Modified Gravities [PDF]
Foundations of physics, 2015 The existence of current–time universe’s acceleration is usually modeled by means of two main strategies. The first makes use of a dark energy barotropic fluid entering by hand the energy–momentum tensor of Einstein’s theory. The second lies on extending
Orlando Luongo, H. Quevedo
semanticscholar +2 more sources
Quantum Fluctuation of the Quantum Geometric Tensor and Its Manifestation as Intrinsic Hall Signatures in Time-Reversal Invariant Systems. [PDF]
Physical Review Letters, 2023 In time-reversal invariant systems, all charge Hall effects predicted so far are extrinsic effects due to the dependence on the relaxation time. We explore intrinsic Hall signatures by studying the quantum noise spectrum of the Hall current in time ...
Miaomiao Wei +6 more
semanticscholar +1 more source
Analysis method for 3D power spectrum of projected tensor fields with fast estimator and window convolution modeling: An application to intrinsic alignments [PDF]
Physical Review D, 2022 Rank-2 tensor fields of large-scale structure, e.g. a tensor field inferred from shapes of galaxies, open up a window to directly access 2-scalar, 2-vector and 2-tensor modes, where the scalar fields can be measured independently from the standard ...
Toshiki Kurita, M. Takada
semanticscholar +1 more source
The intrinsic B-mode polarisation of the Cosmic Microwave Background [PDF]
, 2014 We estimate the B-polarisation induced in the Cosmic Microwave Background by the non-linear evolution of density perturbations. Using the second-order Boltzmann code SONG, our analysis incorporates, for the first time, all physical effects at ...
C. Fidler +5 more
semanticscholar +1 more source
Nonlinear definition of the shadowy mode in higher-order scalar-tensor theories [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 We study U-DHOST theories, i.e., higher-order scalar-tensor theories which are degenerate only in the unitary gauge and yield an apparently unstable extra mode in a generic coordinate system.
Antonio de Felice +2 more
semanticscholar +1 more source
“Squashed entanglement”: An additive entanglement measure [PDF]
, 2003 In this paper, we present a new entanglement monotone for bipartite quantum states. Its definition is inspired by the so-called intrinsic information of classical cryptography and is given by the halved minimum quantum conditional mutual information over
M. Christandl, A. Winter
semanticscholar +1 more source
Geometry of Carrollian stretched horizons [PDF]
Classical and quantum gravityIn this paper, we present a comprehensive toolbox for studying Carrollian stretched horizons, encompassing their geometry, dynamics, symplectic geometry, symmetries, and corresponding Noether charges.
Laurent Freidel, Puttarak Jai-akson
semanticscholar +1 more source
Towards an Intrinsic Definition of Robustness for a Classifier [PDF]
IEEE International Conference on Acoustics, Speech, and Signal Processing, 2020 Finding good measures of robustness – i.e. the ability to correctly classify corrupted input signals – of a trained classifier is an important question for sensitive practical applications.
Th'eo Giraudon +3 more
semanticscholar +1 more source