Trajectory phases of a quantum dot model

作者：Genway Sam^*; Hickey James M; Garrahan Juan P; Armour Andrew D

来源：Journal of Physics A-Mathematical and Theoretical, 2014, 47(50): 505001.

DOI：10.1088/1751-8113/47/50/505001

• large deviations in non-equilibrium systems
• quantum transport
• current fluctuations

We present a thermodynamic formalism to study the trajectories of charge transport through a quantum dot coupled to two leads in the resonant-level model. We show that a close analogue of equilibrium phase transitions exists for the statistics of transferred charge; by tuning an appropriate %26apos;counting field%26apos;, crossovers to different trajectory phases are possible. Our description reveals a mapping between the statistics of a given device and current measurements over a range of devices with different dot-lead coupling strengths. Furthermore insight into features of the trajectory phases are found by studying the occupation of the dot conditioned on the transported charge between the leads; this is calculated from first principles using a trajectory biased two-point projective measurement scheme.

• 出版日期2014-12-19