Results 131 to 140 of about 37,755 (223)

Fermion bag approach to fermion sign problems

, 2013
The fermion bag approach is a new method to tackle fermion sign problems in lattice field theories. Using this approach it is possible to solve a class of sign problems that seem unsolvable by traditional methods.
Shailesh Chandrasekharan
core   +1 more source

Holography for Sp(2N c ) gauge dynamics: from composite Higgs to technicolour

Journal of High Energy Physics
We study Sp(2N c ) gauge dynamics with two Dirac fermion flavours in the fundamental representation. These strongly coupled systems underlie some composite Higgs models with a global symmetry breaking pattern SU(4)→Sp(4), leading to a light quartet of ...
Johanna Erdmenger, Nick Evans, Yang Liu, Werner Porod   +3 more
doaj   +1 more source

A pseudo-fermion propagator approach to the fermion sign problem

The Journal of Chemical Physics
In this work, within the framework of path integral Monte Carlo, we construct a pseudo-fermion propagator by replacing the original fermionic determinant with its absolute value. This modified propagator defines an auxiliary system free from the fermion sign problem, enabling efficient simulations of fermionic systems.
Yunuo Xiong, Hongwei Xiong
openaire   +3 more sources

Bright solitons and soliton trains in a fermion-fermion mixture

, 2006
We use a time-dependent dynamical mean-field-hydrodynamic model to predict and study bright solitons in a degenerate fermion-fermion mixture in a quasi-one-dimensional cigar-shaped geometry using variational and numerical methods.
Adhikari, S. K., S. K. Adhikari
core   +1 more source

Untwisted moduli and internal fermions in free fermionic strings

Nuclear Physics B, 1995
We investigate the dependence of the number and type of untwisted moduli on the boundary condition vectors of relistic free fermionic strings. The number of moduli is given by six minus the number of complex internal world--sheet fermions and the type of moduli is determined by the details of the world--sheet left--right asymmetry of the boundary ...
openaire   +3 more sources

Heavy-fermion superconductivity

, 2006
The heavy-fermion superconductors show the most significant differences from conventional superconductors. Heavy fermions are compounds containing rare-earth or actinide ions whose f-shell electrons are strongly correlated. The theories presented in this
Oyanna, GK, Ekpekpo, Arthur, GK Oyanna, Arthur Ekpekpo   +3 more
core   +1 more source

Optimal Hamiltonian for Fermion flows [PDF]

, 2006
We consider the problem of determining the noise coefficients of the Hamiltonian associated with a Fermion flow so as to minimize a naturally associated quadratic performance functional.
Accardi, L, Boukas, A., Boukas, A, ACCARDI, LUIGI   +3 more
core  

Higher Fermions in Supergravity

Physical Review Letters
We show that the generalized geometry formalism provides a new approach to the description of higher-fermion terms in 𝒩 = 1 supergravity in ten ...
Julian Kupka, Charles Strickland-Constable, Fridrich Valach   +2 more
openaire   +3 more sources

Wilson loops, geometric operators and fermions in 3d group field theory

Open Physics, 2011
Dowdall R.
doaj   +1 more source

Boson-fermion model beyond mean-field approximation [PDF]

, 1996
A model of hybridized bosons and fermions is studied beyond the mean field approximation. The divergent boson self-energy at zero temperature makes the Cooper pairing of fermions impossible.
A.S. Alexandrov (7170284)
core