CATHERINE PéPIN

SÉMINAIRE
THÉORIE DE LA MATIÈRE CONDENSÉE
SUR LE PLATEAU
Orsay - Palaiseau - Saclay
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Jeudi 17 Juin 2010 à 11h00
LPS Bât. 510, Orsay, Petit amphi
A bosonization in any dimension and the Monte
Carlo Sign Fermion problem
CATHERINE PéPIN
IPhT, Saclay and IIP, Natal, Brazil
We present a New Bosonization Technique valid in any dimension of space and
for which patches of the Fermi surface are unnecessary. We argue that when this
bosonization is applied to Quantum Monte Carlo simulations, the long standing
sign problem of evaluating the fermion paths should disapear. In particular we
show that all the Boltzmann weights are now positive in the new bosonized framework. * K.B. Efetov, C. Pepin, H. Meier, Exact bosonization for an interacting
Fermi gas in arbitrary dimensions Phys. Rev. Lett. 103,186403 (2009)
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