Electron Pumping under Non-Markovian Dissipation: The Role of the Self-Consistent Field
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Contributors
Abstract
Focusing on electron transport through a periodically driven resonant tunneling diode, we study the generation of a non-vanishing dc-current by applying symmetry breaking external ac fields with phase difference phi in a statically unbiased system. The effect of an environment is investigated using the system-bath Hamiltonian represented by the electron system coupled to harmonic oscillator modes with a Drude-Lorentz spectral density. To carry out simulations, we use the hierarchal equations of motion approach in the Wigner representation including a self-consistently constructed electric field that is determined from the electron distribution using the Poisson equation. We show that the maximal pumping current at a phase difference near phi = pi/2 is strongly influenced by the system-bath coupling strength. The effect of dissipation is diminished if the self-consistent part of the potential is ignored.
Details
Original language | English |
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Article number | 034803 |
Number of pages | 7 |
Journal | Journal of the Physical Society of Japan |
Volume | 85 |
Issue number | 3 |
Publication status | Published - 15 Mar 2016 |
Peer-reviewed | Yes |
External IDs
Scopus | 84978945755 |
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WOS | 000371091100032 |
Keywords
Keywords
- QUANTUM SYSTEM, NOISE BATH, DRIVEN, RECTIFICATION, OSCILLATIONS, WAVEPACKETS, TRANSPORT, MECHANICS, RATCHETS, dissipation