61 citations · 138 across the 15 of their papers we have counts for
16 papers
Field-free dual superconducting diode via photon-assisted interference
Laura Borgongino, Rubén Seoane Souto, José Luis del Olmo +4
Non-reciprocal transport underpins key functionalities in signal processing and logic; however, conventional semiconductor diodes exhibit reduced performance at sub-Kelvin temperat…
All-electrical dephasing-protected spin qubits in altermagnets
José Carlos Abadillo-Uriel, Andrea Maiani, Alberto Cortijo +2
We propose altermagnetic semiconductors as a platform for field-free, all-electrically controlled spin qubits in gate-defined quantum dots. The momentum-dependent spin splitting of…
Lindblad theory of linear response susceptibility and dispersive readout in minimal Kitaev junctions
Tobias Kuhn, Raffael L. Klees, Ramón Aguado +1
The field of hybrid superconductor-semiconductor quantum dots is advancing toward the development of functional devices that leverage the advantages of both types of materials. How…
Assessing Majorana states and qubits through quantum capacitance
Rodrigo A. Dourado, Ramón Aguado, Jeroen Danon +2
Quantum capacitance (QC) has recently emerged as a promising tool for parity readout in topological qubits based on Majorana bound states (MBSs). Here, we show that this capability…
Optimal Majoranas in Mesoscopic Kitaev Chains
M. Alvarado, R. Seoane Souto, María José Calderón +1
Kitaev chains realized in quantum dots coupled via superconducting segments provide a controllable platform for engineering Majorana zero modes (MZMs). In these systems, subgap sta…
Granular aluminum induced superconductivity in germanium for hole spin-based hybrid devices
Giorgio Fabris, Paul Falthansl-Scheinecker, Devashish Shah +19
In superconductor-semiconductor hybrid structures, superconductivity and spin polarization are competing effects as magnetic fields break Cooper pairs. They can be combined using t…
Novel qubits in hybrid semiconductor-superconductor nanostructures
Marta Pita-Vidal, Rubén Seoane Souto, Srijit Goswami +4
Hybrid semiconductor-superconductor qubits have recently emerged as a promising alternative to traditional platforms, combining material advantages with device-level tunability. A…
Characterizing local Majorana properties using Andreev states
Miguel Alvarado, Alfredo Levy Yetati, Ramón Aguado +1
We propose using Andreev bound states (ABS) as spectroscopic probes to characterize Majorana zero modes (MZMs) in quantum-dot based minimal Kitaev chains. Specifically, we show tha…
Flux-tunable parity-protected qubit based on a single full-shell nanowire Josephson junction
G. Giavaras, Ruben Seoane Souto, Maria Jose Calderon +1
Leveraging the higher harmonics content of the Josephson potential in a superconducting circuit offers a promising route in the search for new qubits with increased protection agai…
Theory of superconducting proximity effect in hole-based hybrid semiconductor-superconductor devices
D. Michel Pino, Rubén Seoane-Souto, Maria José Calderón +2
Hybrid superconductor-semiconductor systems have received a great deal of attention in the last few years because of their potential for quantum engineering, including novel qubits…
Interplay between Majorana and Shiba states in a minimal Kitaev chain coupled to a superconductor
Miguel Alvarado, Alfredo Levy Yeyati, Ramón Aguado +1
Two semiconducting quantum dots (QDs) coupled through a superconductor constitute a minimal realisation of a Kitaev chain with Majorana zero modes (MZMs). Such MZMs can be detected…
Non-Hermitian minimal Kitaev chains
Jorge Cayao, Ramón Aguado
Starting from a double quantum dot realization of a minimal Kitaev chain, we demonstrate that non-Hermicity stabilizes the so-called poor man's Majorana zero modes in a region of p…
Thermodynamics of Non-Hermitian Josephson junctions with exceptional points
D. Michel Pino, Yigal Meir, Ramón Aguado
We present an analytical formulation of the thermodynamics, free energy and entropy, of any generic Bogoliubov de Genes model which develops exceptional point (EP) bifurcations in…
Subgap states in semiconductor-superconductor devices for quantum technologies: Andreev qubits and minimal Majorana chains
Rubén Seoane Souto, Ramón Aguado
In recent years, experimental advances have made it possible to achieve an unprecedented degree of control over the properties of subgap bound states in hybrid nanoscale supercondu…
Minimal Kitaev-transmon qubit based on double quantum dots
D. Michel Pino, Rubén Seoane Souto, Ramón Aguado
Minimal Kitaev chains composed of two semiconducting quantum dots coupled via a grounded superconductor have emerged as a promising platform to realize and study Majorana bound sta…
Magnetic Field Probing of an SU(4) Kondo Resonance in a Single Atom Transistor
G. C. Tettamanzi, J. Verduijn, G. P. Lansbergen +4
Semiconductor nano-devices have been scaled to the level that transport can be dominated by a single dopant atom. In the strong coupling case a Kondo effect is observed when one el…