380 citations · 2.9k across the 44 of their papers we have counts for
45 papers
Free energy of the gas of spin 1/2 fermions beyond the second order and the Stoner phase transition
Oskar Grocholski, Piotr H. Chankowski
Applying the previously developed systematic thermal (imaginary time) perturbative expansion to the relevant effective field theory we compute the free energy of the diluted ga…
Perturbative computation of thermal characteristics of the Stoner phase transition
Oskar Grocholski, Piotr H. Chankowski
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 ca…
Third order corrections to the ground state energy of the gas of spin fermions with arbitrary densities of different spin projections
Piotr H. Chankowski, Jacek Wojtkiewicz, Szymon Augustynowicz
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-independen…
Ground state energies of the Hubbard models and the Hartree Fock approximation
Jacek Wojtkiewicz, Piotr H. Chankowski
According to the `folk knowledge', the Hartree-Fock (H-F) approximation applied to the Hubbard model becomes exact in the limit of small coupling (the smaller , the better…
Third order corrections to the ground state energy of the polarized diluted gas of spin fermions
Piotr H. Chankowski, Jacek Wojtkiewicz, Rashad Bakhshizada
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 fermions interacting…
On the ground-state energy of a mixture of two different oppositely polarized fermionic gases
Piotr Chankowski, Jacek Wojtkiewicz
We report the results of the computation of the order correction, where is the Fermi wave vector and the -wave scattering length of th…