Selected Publications
- Spin resonance under topological driving fields, A.A. Reynoso, J.P. Baltanás, H. Saarikoski, J.E. Vázquez-Lozano, J. Nitta, and D. Frustaglia, New Journal of Physics 19, 063010 (2017).
- Classical physics and the bounds of quantum correlations, D. Frustaglia, J.P. Baltanás, M.C. Velázquez-Ahumada, A. Fernández-Prieto, A. Lujambio, V. Losada, M.J. Freire, and A. Cabello, Physical Review Letters 116, 250404 (2016). See feature article in Phys.org, July 2016.
- Control of the spin geometric phase in semiconductor quantum rings, F. Nagasawa, D. Frustaglia, H. Saarikoski, K. Richter, and J. Nitta, Nature Communications 4, 2526 (2013).
- Characterizing electron entanglement in multiterminal mesoscopic conductors, V. Giovannetti, D. Frustaglia, F. Taddei, and R. Fazio, Physical Review B 75, 241305(R) (2007).
- Spin interference effects in ring conductors subject to Rashba coupling, D. Frustaglia and K. Richter, Physical Review B 69, 235310 (2004).
FRIAS Project
Geometric and Topological Resources for Spin Control
We aim to identify optimal tools for the manipulation of quantum spin states by engineering geometric and topological resources at reach in mesoscopic solid-state systems.
Electronic nanostructures are an ideal laboratory for studying the foundations of quantum mechanics. At the same time, they represent the paradigm of quantum-information technology for the development of new (quantum) formats of computation and communication, especially those relying on spin physics. A key resource is the possibility to tailor internal (spin-orbit) and external fields, resulting in a variety of hybrid magnetic textures. Our goal is to achieve a controlled manipulation of spin dynamics by exploiting the geometrical (local) and topological (global) properties of the effective fields as distinct resources in semiconducting nanocircuits, the working principle of which is spin interferometry. Specifically, we shall study the relevant mechanisms that can switch the spin dynamics between phases of different topological characteristics and modify the global properties dramatically (reflected in an observable such as the conductance) by tuning a control parameter (a magnetic or electric field) accessible to the state-of-the-art technologies. Similar phenomena are displayed in other two-level quantum systems as, e.g., strongly-driven superconducting qubits, which shall be also a subject of our study. The main activity will consist in the development of theoretical and numerical models for the design of experiments.