 
Summary: A method to avoid the sign problem
in finite density lattice QCD
Shinji Ejiri
(Brookhaven National Laboratory)
Existence of the critical point in finite density lattice QCD
Physical Review D77 (2008) 014508 [arXiv:0706.3549]
Canonical partition function and finite density phase transition in lattice QCD
Physical Review D 78 (2008) 074507[arXiv:0804.3227]
ECT* workshop ``Sign Problems and Complex Actions''
(Trento, March 26, 2009)
QCD thermodynamics at 0
· Interesting properties of QCD
Measurable in heavyion collisions
Critical point at finite density
· Methods for the high density region: required
· Most difficult problem: "sign problem"
In this talk
· Propose a method to avoid the sign problem.
· Discuss an effective potential as a function of the total quark number
and the nature of phase transitions at finite density.
