Quantum Monte Carlo method for models of molecular nanodevices

Details Quantum Monte Carlo method for models of molecular nanodevices Quantum Monte Carlo method for models of molecular nanodevices

2005-05-11

arxiv.org/abs/cond-mat/0505291v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.72.041301

We introduce a quantum Monte Carlo technique to calculate exactly at finite temperatures the Green function of a fermionic quantum impurity coupled to a bosonic field. While the algorithm is general, we focus on the single impurity Anderson model coupled to a Holstein phonon as a schematic model for a molecular transistor. We compute the density of states at the impurity in a large range of parameters, to demonstrate the accuracy and efficiency of the method. We also obtain the conductance of the impurity model and analyze different regimes. The results show that even in the case when the effective attractive phonon interaction is larger than the Coulomb repulsion, a Kondo-like conductance behavior might be observed.

Affiliated with

Also associated with

No associations

Rating

Quantum Monte Carlo method for models of molecular nanodevices does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Quantum Monte Carlo method for models of molecular nanodevices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum Monte Carlo method for models of molecular nanodevices will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-73159