@article{ISI:000235669100034,
 abstract = {The nonequilibrium Green's function formalism for infinitely extended
reservoirs coupled to a finite system can be derived by solving the
equations of motion for a tight-binding Hamiltonian. While this approach
gives the correct density for the continuum states, we find that it does
not lead, in the absence of any additional mechanisms for equilibration,
to a unique expression for the density matrix of any bound states which
may be present. Introducing some auxiliary reservoirs which are very
weakly coupled to the system leads to a density matrix which is unique
in the equilibrium situation, but which depends on the details of the
auxiliary reservoirs in the nonequilibrium case.},
 article-number = {085119},
 author = {Dhar, A and Sen, D},
 doi = {10.1103/PhysRevB.73.085119},
 eissn = {2469-9969},
 issn = {2469-9950},
 journal = {PHYSICAL REVIEW B},
 month = {FEB},
 number = {8},
 researcherid-numbers = {DHAR, ABHISHEK/C-7359-2009},
 times-cited = {68},
 title = {Nonequilibrium Green's function formalism and the problem of bound
states},
 unique-id = {ISI:000235669100034},
 volume = {73},
 year = {2006}
}