Double quantum dot coupled to a quantum point contact: a stochastic thermodynamics approach
We study the nonequilibrium properties of an electronic circuit composed of a double quantum dot (DQD) channel capacitively coupled to a quantum point contact (QPC) within the framework of stochastic thermodynamics. We show that the transition rates describing the dynamics satisfy a nontrivial local...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2015-01-01
|
| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/17/9/095005 |
| _version_ | 1797751085753958400 |
|---|---|
| author | Gregory Bulnes Cuetara Massimiliano Esposito |
| author_facet | Gregory Bulnes Cuetara Massimiliano Esposito |
| author_sort | Gregory Bulnes Cuetara |
| collection | DOAJ |
| description | We study the nonequilibrium properties of an electronic circuit composed of a double quantum dot (DQD) channel capacitively coupled to a quantum point contact (QPC) within the framework of stochastic thermodynamics. We show that the transition rates describing the dynamics satisfy a nontrivial local detailed balance and that the statistics of energy and particle currents across both channels obeys a fluctuation theorem. We analyze two regimes where the device operates as a thermodynamic machine and study its output power and efficiency fluctuations. We show that the electrons tunneling through the QPC without interacting with the DQD have a strong effect on the device efficiency. |
| first_indexed | 2024-03-12T16:43:20Z |
| format | Article |
| id | doaj.art-3ccbd10d32b0421a9c0147fc39104b38 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:43:20Z |
| publishDate | 2015-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-3ccbd10d32b0421a9c0147fc39104b382023-08-08T14:21:12ZengIOP PublishingNew Journal of Physics1367-26302015-01-0117909500510.1088/1367-2630/17/9/095005Double quantum dot coupled to a quantum point contact: a stochastic thermodynamics approachGregory Bulnes Cuetara0Massimiliano Esposito1Complex Systems and Statistical Mechanics, Physics and Materials Science Research Unit, University of Luxembourg, L-1511 Luxembourg, LuxembourgComplex Systems and Statistical Mechanics, Physics and Materials Science Research Unit, University of Luxembourg, L-1511 Luxembourg, LuxembourgWe study the nonequilibrium properties of an electronic circuit composed of a double quantum dot (DQD) channel capacitively coupled to a quantum point contact (QPC) within the framework of stochastic thermodynamics. We show that the transition rates describing the dynamics satisfy a nontrivial local detailed balance and that the statistics of energy and particle currents across both channels obeys a fluctuation theorem. We analyze two regimes where the device operates as a thermodynamic machine and study its output power and efficiency fluctuations. We show that the electrons tunneling through the QPC without interacting with the DQD have a strong effect on the device efficiency.https://doi.org/10.1088/1367-2630/17/9/095005stochastic thermodynamicsquantum transportfluctuation theoremthermodynamic efficiency |
| spellingShingle | Gregory Bulnes Cuetara Massimiliano Esposito Double quantum dot coupled to a quantum point contact: a stochastic thermodynamics approach New Journal of Physics stochastic thermodynamics quantum transport fluctuation theorem thermodynamic efficiency |
| title | Double quantum dot coupled to a quantum point contact: a stochastic thermodynamics approach |
| title_full | Double quantum dot coupled to a quantum point contact: a stochastic thermodynamics approach |
| title_fullStr | Double quantum dot coupled to a quantum point contact: a stochastic thermodynamics approach |
| title_full_unstemmed | Double quantum dot coupled to a quantum point contact: a stochastic thermodynamics approach |
| title_short | Double quantum dot coupled to a quantum point contact: a stochastic thermodynamics approach |
| title_sort | double quantum dot coupled to a quantum point contact a stochastic thermodynamics approach |
| topic | stochastic thermodynamics quantum transport fluctuation theorem thermodynamic efficiency |
| url | https://doi.org/10.1088/1367-2630/17/9/095005 |
| work_keys_str_mv | AT gregorybulnescuetara doublequantumdotcoupledtoaquantumpointcontactastochasticthermodynamicsapproach AT massimilianoesposito doublequantumdotcoupledtoaquantumpointcontactastochasticthermodynamicsapproach |