Geometric energy transport and refrigeration with driven quantum dots
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Geometric energy transport and refrigeration with driven quantum dots. / Monsel, Juliette; Schulenborg, Jens; Baquet, Thibault; Splettstoesser, Janine.
I: Physical Review B, Bind 106, Nr. 3, 035405, 05.07.2022.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Geometric energy transport and refrigeration with driven quantum dots
AU - Monsel, Juliette
AU - Schulenborg, Jens
AU - Baquet, Thibault
AU - Splettstoesser, Janine
PY - 2022/7/5
Y1 - 2022/7/5
N2 - We study geometric energy transport in a slowly driven single-level quantum dot weakly coupled to electronic contacts and with strong on-site interaction, which can be either repulsive or attractive. Exploiting a recently discovered fermionic duality for the evolution operator of the master equation, we provide compact and insightful analytic expressions of energy pumping curvatures for any pair of driving parameters. This enables us to systematically identify and explain the pumping mechanisms for different driving schemes, thereby also comparing energy and charge pumping. We determine the concrete impact of many-body interactions and show how particle-hole symmetry and fermionic duality manifest, both individually and in combination, as system-parameter symmetries of the energy pumping curvatures. Building on this transport analysis, we study the driven dot acting as a heat pump or refrigerator, where we find that the sign of the on-site interaction plays a crucial role in the performance of these thermal machines.
AB - We study geometric energy transport in a slowly driven single-level quantum dot weakly coupled to electronic contacts and with strong on-site interaction, which can be either repulsive or attractive. Exploiting a recently discovered fermionic duality for the evolution operator of the master equation, we provide compact and insightful analytic expressions of energy pumping curvatures for any pair of driving parameters. This enables us to systematically identify and explain the pumping mechanisms for different driving schemes, thereby also comparing energy and charge pumping. We determine the concrete impact of many-body interactions and show how particle-hole symmetry and fermionic duality manifest, both individually and in combination, as system-parameter symmetries of the energy pumping curvatures. Building on this transport analysis, we study the driven dot acting as a heat pump or refrigerator, where we find that the sign of the on-site interaction plays a crucial role in the performance of these thermal machines.
KW - COULOMB-BLOCKADE OSCILLATIONS
KW - HEAT
KW - SPECTROSCOPY
KW - THERMOPOWER
U2 - 10.1103/PhysRevB.106.035405
DO - 10.1103/PhysRevB.106.035405
M3 - Journal article
VL - 106
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 3
M1 - 035405
ER -
ID: 315393149