Zobrazeno 1 - 10
of 76
pro vyhledávání: '"Chankowski, Piotr H."'
We apply the thermal (imaginary time) perturbative expansion to the relevant effective field theory to compute characteristics of the phase transition to the ordered state which can occur at low temperatures in the gas of (nonrelativistic) spin 1/2 f
Externí odkaz:
http://arxiv.org/abs/2309.14782
Recently we have computed the third order corrections to the ground state energy of the arbitrarily polarized diluted gas of spin 1/2 fermions interacting through a spin-independent repulsive two-body potential. Here we extend this result to the gas
Externí odkaz:
http://arxiv.org/abs/2303.09921
Publikováno v:
Rep. Math. Phys. 92, 227-241 (2023)
According to the `folk knowledge', the Hartree-Fock (H-F) approximation applied to the Hubbard model becomes exact in the limit of small coupling $U$ (the smaller $|U|$, the better is the H-F approximation). In \cite{BP} Bach and Poelchau have substa
Externí odkaz:
http://arxiv.org/abs/2209.02361
Publikováno v:
Acta Phys. Pol. B53, 9-A4 (2022)
We present the results of the computation of the third order corrections to the ground state energy of the diluted polarized gas of nonrelativistic spin $1/2$ fermions interacting through a spin-independent repulsive two-body potential. The correctio
Externí odkaz:
http://arxiv.org/abs/2206.05076
Autor:
CHANKOWSKI, PIOTR H.1 chank@fuw.edu.pl
Publikováno v:
Acta Physica Polonica B. 2024, Vol. 55 Issue 3, p1-30. 30p.
Publikováno v:
In Reports on Mathematical Physics October 2023 92(2):227-241
We perform a systematic one-loop renormalization of a general renormalizable Yang-Mills theory coupled to scalars and fermions using a regularization scheme with a smooth momentum cutoff $\Lambda$ (implemented through an exponential damping factor).
Externí odkaz:
http://arxiv.org/abs/1608.02270
The momentum UV cutoff in Quantum Field Theory is usually treated as an auxiliary device allowing to obtain finite amplitudes satisfying all physical requirements. It is even absent (not explicit) in the most popular approach - the dimensional regula
Externí odkaz:
http://arxiv.org/abs/1608.01214
Publikováno v:
Mod. Phys. Lett. A, Vol. 30, No. 2 (2015), 1550006
We point out a novel possible mechanism by which the electroweak hierarchy problem can be avoided in the (effective) quantum field theory. Assuming the existence of a UV complete underlying fundamental theory and treating the cutoff scale $\Lambda$ o
Externí odkaz:
http://arxiv.org/abs/1404.0548
Autor:
Chankowski, Piotr H., Wagner, Jakub
Publikováno v:
Phys.Rev.D77:025033,2008
We point out that in non supersymmetric GUTs, in which the SU(5) gauge symmetry is broken down to the Standard Model gauge group by a $\mathbf{24}$ Higgs multiplet the Appelquist-Carazzone decoupling is violated. This is because the $SU(2)_L$ Higgs t
Externí odkaz:
http://arxiv.org/abs/0707.2323