129 citations · 380 across the 14 of their papers we have counts for
14 papers
Hubbard vs. Emery model: spectra, transport and relevance for cuprates
Jakša Vučičević, Rok Žitko
Understanding the transport properties of cuprate superconductors is one of the central challenges in the physics of strongly correlated electrons. The most common approach is to d…
Systematic Schrieffer-Wolff-transformation approach to Josephson junctions: quasiparticle effects and Josephson harmonics
Ádám Bácsi, Teodor Iličin, Rok Žitko
We use the Schrieffer-Wolff transformation (SWT) to analyze Josephson junctions between superconducting leads described by the charge-conserving BCS theory. Starting from the singl…
Andreev bound state spectroscopy of a quantum-dot-based Aharonov-Bohm interferometer with superconducting terminals
Peter Zalom, Don Rolih, Rok Žitko
We analytically and numerically investigate an Aharonov-Bohm interferometer with two superconducting terminals and a strongly correlated quantum dot in one arm. Through a rigorous…
Strong-coupling theory of quantum dot Josephson junctions: role of the residual quasiparticle
Luka Pavešič, Ramón Aguado, Rok Žitko
We consider an interacting quantum dot strongly coupled to two superconducting leads in a Josephson junction geometry. By defining symmetry-adapted superpositions of states from th…
Quantum capacitance of a superconducting subgap state in an electrostatically floating dot-island
Filip K. Malinowski, R. K. Rupesh, Luka Pavešić +10
We study a hybrid device defined in an InAs nanowire with an epitaxial Al shell that consists of a quantum dot in contact with a superconducting island. The device is electrically…
Spectroscopy of spin-split Andreev levels in a quantum dot with superconducting leads
Arno Bargerbos, Marta Pita-Vidal, Rok Žitko +9
We use a hybrid superconductor-semiconductor transmon device to perform spectroscopy of a quantum dot Josephson junction tuned to be in a spin-1/2 ground state with an unpaired qua…
Direct manipulation of a superconducting spin qubit strongly coupled to a transmon qubit
Marta Pita-Vidal, Arno Bargerbos, Rok Žitko +9
Spin qubits in semiconductors are currently one of the most promising architectures for quantum computing. However, they face challenges in realizing multi-qubit interactions over…
Yu-Shiba-Rusinov states, the BCS-BEC crossover, and the exact solution in the flat-band limit
Rok Žitko, Luka Pavešić
We study the subgap Yu-Shiba-Rusinov (YSR) states in the Richardson's model of a superconductor with a magnetic impurity for different electron pairing strengths from the weak-coup…
Entanglement between quasiparticles in superconducting islands mediated by a single spin
Juan Carlos Estrada Saldaña, Alexandros Vekris, Luka Pavešič +3
Condensed matter is composed of a small set of identical units, yet it shows an immense range of behaviour. Recently, an array of cold atoms was used to generate long-range quantum…
Qubit based on spin-singlet Yu-Shiba-Rusinov states
Luka Pavešić, Rok Žitko
The local magnetic moment of an interacting quantum dot occupied by a single electron can be screened by binding a Bogoliubov quasiparticle from a nearby superconductor. This gives…
Coupled Yu-Shiba-Rusinov states induced by a many-body molecular spin on a superconductor
Carmen Rubio-Verdú, Javier Zaldívar, Rok Žitko +1
A magnetic impurity on a superconductor induces Yu-Shiba-Rusinov (YSR) bound states, detected by tunneling spectroscopy as long-lived quasiparticle excitations inside the supercond…
Investigation of the Yu-Shiba-Rusinov states of a multi-impurity Kondo system
A. Kamlapure, L. Cornils, R. Žitko +7
Recent studies of mutually interacting magnetic atoms coupled to a superconductor have gained enormous interest due to the potential realization of topological superconductivity. T…
Padé approximants for improved finite-temperature spectral functions in the numerical renormalization group
Žiga Osolin, Rok Žitko
We introduce an improved approach for obtaining smooth finite-temperature spectral functions of quantum impurity models using the numerical renormalization group (NRG) technique. I…
Non-Drude universal scaling laws for the optical response of local Fermi liquids
Christophe Berthod, Jernej Mravlje, Xiaoyu Deng +3
We investigate the frequency and temperature dependence of the low-energy electron dynamics in a Landau Fermi liquid with a local self-energy. We show that the frequency and temper…