Time-dependent quantum transport: An exact formulation based on TDDFT
(2004) In Europhysics Letters 67(1). p.14-20- Abstract
- An exact theoretical framework based on Time Dependent Density Functional Theory (TDDFT) is proposed in order to deal with the time-dependent quantum transport in fully interacting systems. We use a partition-free approach by Cini in which the whole system is in equilibrium before an external electric field is switched on. Our theory includes the interactions between the leads and between the leads and the device. It is well suited for calculating measurable transient phenomena as well as a.c. and other time-dependent responses. We show that the steady-state current results from a dephasing mechanism provided the leads are macroscopic and the device is finite. In the d.c. case, we obtain a Landauer-like formula when the effective potential... (More)
- An exact theoretical framework based on Time Dependent Density Functional Theory (TDDFT) is proposed in order to deal with the time-dependent quantum transport in fully interacting systems. We use a partition-free approach by Cini in which the whole system is in equilibrium before an external electric field is switched on. Our theory includes the interactions between the leads and between the leads and the device. It is well suited for calculating measurable transient phenomena as well as a.c. and other time-dependent responses. We show that the steady-state current results from a dephasing mechanism provided the leads are macroscopic and the device is finite. In the d.c. case, we obtain a Landauer-like formula when the effective potential of TDDFT is uniform deep inside the electrodes. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/269592
- author
- Stefanucci, Gianluca LU and Almbladh, Carl-Olof LU
- organization
- publishing date
- 2004
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Europhysics Letters
- volume
- 67
- issue
- 1
- pages
- 14 - 20
- publisher
- EDP Sciences
- external identifiers
-
- wos:000223424900003
- scopus:3042856179
- ISSN
- 0295-5075
- DOI
- 10.1209/epl/i2004-10043-7
- language
- English
- LU publication?
- yes
- id
- 047afd61-f99f-4717-bace-5d5a89196a48 (old id 269592)
- date added to LUP
- 2016-04-01 11:59:30
- date last changed
- 2022-01-26 21:11:49
@article{047afd61-f99f-4717-bace-5d5a89196a48, abstract = {{An exact theoretical framework based on Time Dependent Density Functional Theory (TDDFT) is proposed in order to deal with the time-dependent quantum transport in fully interacting systems. We use a partition-free approach by Cini in which the whole system is in equilibrium before an external electric field is switched on. Our theory includes the interactions between the leads and between the leads and the device. It is well suited for calculating measurable transient phenomena as well as a.c. and other time-dependent responses. We show that the steady-state current results from a dephasing mechanism provided the leads are macroscopic and the device is finite. In the d.c. case, we obtain a Landauer-like formula when the effective potential of TDDFT is uniform deep inside the electrodes.}}, author = {{Stefanucci, Gianluca and Almbladh, Carl-Olof}}, issn = {{0295-5075}}, language = {{eng}}, number = {{1}}, pages = {{14--20}}, publisher = {{EDP Sciences}}, series = {{Europhysics Letters}}, title = {{Time-dependent quantum transport: An exact formulation based on TDDFT}}, url = {{http://dx.doi.org/10.1209/epl/i2004-10043-7}}, doi = {{10.1209/epl/i2004-10043-7}}, volume = {{67}}, year = {{2004}}, }