TY - JOUR
T1 - Free energy and effective mass of the polaron at finite temperatures
AU - Castrigiano, D. P.L.
AU - Kokiantonis, N.
AU - Stierstorfer, H.
PY - 1984/9/10
Y1 - 1984/9/10
N2 - Explicit expressions depending on two variational parameters are derived for the free energy and the effective mass of the Fröhlich polaron at finite temperatures. The variation is carried out with Feynman's trial action and an arbitrary external electric force. All path integrals occurring in that connection are evaluated exactly. Asymptotic expressions in the weak and strong coupling case as well as diagrams for the main formulae are given.
AB - Explicit expressions depending on two variational parameters are derived for the free energy and the effective mass of the Fröhlich polaron at finite temperatures. The variation is carried out with Feynman's trial action and an arbitrary external electric force. All path integrals occurring in that connection are evaluated exactly. Asymptotic expressions in the weak and strong coupling case as well as diagrams for the main formulae are given.
UR - http://www.scopus.com/inward/record.url?scp=33744592411&partnerID=8YFLogxK
U2 - 10.1016/0375-9601(84)90818-1
DO - 10.1016/0375-9601(84)90818-1
M3 - Article
AN - SCOPUS:33744592411
SN - 0375-9601
VL - 104
SP - 364
EP - 369
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 6-7
ER -