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pro vyhledávání: '"Perturbative calculation"'
Autor:
Brister, James
We present a general method for the perturbative calculation of the entanglement entropy between two interacting quantum fields. Previous attempts at calculating this quantity perturbatively have encountered a seemingly pathological divergence; we ex
Externí odkaz:
http://arxiv.org/abs/1906.00641
Autor:
Maceda, Marco, Villafuerte-Lara, Jairo
We analyse a modified Dirac equation based on a noncommutative structure in phase space. The noncommutative structure induces generalised momenta and contributions to the energy levels of the standard Dirac equation. Using techniques of perturbation
Externí odkaz:
http://arxiv.org/abs/1909.06311
Publikováno v:
PoS(LATTICE2018)295
We present matching factors for $Z_q$ calculated perturbatively at the one-loop level with improved staggered quarks. We calculate $Z_q$ with HYP-smeared staggered quarks and Symanzik-improved gluons using both RI-MOM and RI$'$-MOM schemes. We compar
Externí odkaz:
http://arxiv.org/abs/1810.13149
Autor:
Müller, Sebastian, Novaes, Marcel
Publikováno v:
Phys. Rev. E 98, 052208 (2018)
Starting from a semiclassical approach recently developed for spectral correlation functions of quantum systems whose classical dynamics is chaotic, we focus on the case of broken time-reversal symmetry, the so-called unitary class. We obtain to all
Externí odkaz:
http://arxiv.org/abs/1807.10186
Autor:
Sen, Sangita, Tellgren, Erik I.
External non-uniform magnetic fields acting on molecules induce non-collinear spin-densities and spin-symmetry breaking. This necessitates a general two-component Pauli spinor representation. In this paper, we report the implementation of a General H
Externí odkaz:
http://arxiv.org/abs/1803.04776
Publikováno v:
Phys. Rev. D 97, 074509 (2018)
We propose a method to compute the Wilson coefficients of the weak effective Hamiltonian to all orders in the strong coupling constant using Lattice QCD simulations. We perform our calculations adopting an unphysically light weak boson mass of around
Externí odkaz:
http://arxiv.org/abs/1711.05768
Autor:
Galiautdinov, Andrei
Working in the effective-mass approximation, we apply a powerful convergent perturbative technique of Turbiner's to the calculation of the ground state energy and the wave function of an exciton confined to a three-dimensional parabolic quantum dot.
Externí odkaz:
http://arxiv.org/abs/1710.04933
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We report on recent improvements to our non-perturbative calculation of the positronium spectrum. Our Hamiltonian is a two-body effective interaction which incorporates one-photon exchange terms, but neglects fermion self-energy effects. This effecti
Externí odkaz:
http://arxiv.org/abs/1502.02993
In stochastic systems with weak noise, the logarithm of the stationary distribution becomes proportional to a large deviation rate function called the quasi-potential. The quasi-potential, and its characterization through a variational problem, lies
Externí odkaz:
http://arxiv.org/abs/1509.03273