Masters Defense by Anine Borger – University of Copenhagen

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Masters Defense by Anine Borger

Title: 
Steady State Entanglement in Quantum Dot Networks

Abstract: 
We propose to engineer the coupling of quantum dot networks to reservoirs such that the steady state of electron transport through the network has a large population of a specific multi-electron entangled state. Specifically, we investigate whether the coupling of a linear triple dot network to reservoirs can be tuned such that the steady state has a large population of the spin singlet state with one electron on each of the outer dots as a proof of concept. We find the steady state population by numerically solving the master equation for the triple dot modeled as an open quantum system. The master equation is derived under the Born and Markov approximations. We then compare the results to a perturbative estimate of the population. Our results show promise for engineering the coupling of the triple dot network to reservoirs such that it has a large steady state population of the desired singlet state. This approach and its generalizations to larger networks may provide new routes for dissipative preparation of multi-particle entanglement in solid state quantum circuits.