134 citations · 745 across the 27 of their papers we have counts for
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Birth Quota of Non-Generic Degeneracy Points
Gergő Pintér, György Frank, Dániel Varjas +1
Weyl points are generic and stable features in the energy spectrum of Hamiltonians that depend on a three-dimensional parameter space. Non-generic isolated two-fold degeneracy poin…
Weyl-point teleportation
György Frank, Dániel Varjas, Gergő Pintér +1
In this work, we describe the phenomenon of Weyl-point teleportation. Weyl points usually move continuously in the configuration parameter space of a quantum system when the contro…
From Cooper pair splitting to the non-local spectroscopy of a Shiba state
Zoltán Scherübl, Gergő Fülöp, Jörg Gramich +4
Cooper pair splitting (CPS) is a way to create spatially separated, entangled electron pairs. To this day, CPS is often identified in experiments as a spatial current correlation.…
Dephasing of Majorana qubits due to quasistatic disorder
Péter Boross, András Pályi
Quantum bits based on Majorana zero modes are expected to be robust against certain noise types, and hence provide a quantum computing platform that is superior to conventional qub…
Topological charge distributions of an interacting two-spin system
György Frank, Dániel Varjas, Péter Vrana +2
Quantum systems are often described by parameter-dependent Hamiltonians. Points in parameter space where two levels are degenerate can carry a topological charge. Here we theoretic…
Charge noise and overdrive errors in reflectometry-based charge, spin and Majorana qubit readout
Vahid Derakhshan Maman, M. F. Gonzalez-Zalba, András Pályi
Solid-state qubits incorporating quantum dots can be read out by gate reflectometry. Here, we theoretically describe physical mechanisms that render such reflectometry-based readou…
Magnetic degeneracy points in interacting two-spin systems: geometrical patterns, topological charge distributions, and their stability
György Frank, Zoltán Scherübl, Szabolcs Csonka +2
Spectral degeneracies of quantum magnets are often described as diabolical points or magnetic Weyl points, which carry topological charge. Here, we study a simple, yet experimental…
Parity-to-charge conversion for readout of topological Majorana qubits
Gábor Széchenyi, András Pályi
We theoretically study a scheme to distinguish the two ground states of a one-dimensional topological superconductor, which could serve as a basis for the readout of Majorana qubit…
Hyperfine-assisted decoherence of a phosphorus nuclear-spin qubit in silicon
Bence Hetényi, Péter Boross, András Pályi
The nuclear spin of a phosphorus atom in silicon has been used as a quantum bit in various quantum-information experiments. It has been proposed that this nuclear-spin qubit can be…
Poor man's topological quantum gate based on the Su-Schrieffer-Heeger model
Péter Boross, János K. Asbóth, Gábor Széchenyi +2
Topological properties of quantum systems could provide protection of information against environmental noise, and thereby drastically advance their potential in quantum informatio…
Observation of spin-orbit coupling induced Weyl points and topologically protected Kondo effect in a two-electron double quantum dot
Zoltán Scherübl, András Pályi, György Frank +8
Recent years have brought an explosion of activities in the research of topological aspects of condensed-matter systems. Topologically non-trivial phases of matter are typically ac…
Fast electron spin flips via strong subcycle electric excitation
Máté Tibor Veszeli, András Pályi
An important goal in quantum information processing is to reduce the duration of quantum-logical operations. Motivated by this, we provide a theoretical analysis of electrically in…
Spin-strain interaction in nitrogen-vacancy centers in diamond
Péter Udvarhelyi, Vladyslav O. Shkolnikov, Adam Gali +2
The interaction of solid-state electronic spins with deformations of their host crystal is an important ingredient in many experiments realizing quantum information processing sche…
Hyperfine-assisted fast electric control of dopant nuclear spins in semiconductors
Péter Boross, Gábor Széchenyi, András Pályi
Nuclear spins of dopant atoms in semiconductors are promising candidates as quantum bits, due to the long lifetime of their quantum states. Conventionally, coherent control of nucl…
Electron-electron attraction in an engineered electromechanical system
Gábor Széchenyi, András Pályi, Matthias Droth
Two electrons in a quantum dot repel each other: their interaction can be characterized by a positive interaction energy. From the theory of superconductivity, we also know that me…
Coulomb-blockade and Pauli-blockade magnetometry
Gábor Széchenyi, András Pályi
Scanning-probe magnetometry is a valuable experimental tool to investigate magnetic phenomena at the micro- and nanoscale. We theoretically analyze the possibility of measuring mag…
Control of valley dynamics in silicon quantum dots in the presence of an interface step
Péter Boross, Gábor Széchenyi, Dimitrie Culcer +1
Recent experiments on silicon nanostructures have seen breakthroughs toward scalable, long-lived quantum information processing. The valley degree of freedom plays a fundamental ro…
A Short Course on Topological Insulators: Band-structure topology and edge states in one and two dimensions
János K. Asbóth, László Oroszlány, András Pályi
This course-based primer provides newcomers to the field with a concise introduction to some of the core topics in the emerging field of topological band insulators in one and two…
Subharmonic transitions and Bloch-Siegert shift in electrically driven spin resonance
Judit Romhányi, Guido Burkard, András Pályi
We theoretically study coherent subharmonic (multi-photon) transitions of a harmonically driven spin. We consider two cases: magnetic resonance (MR) with a misaligned, i.e., non-tr…
Valley relaxation in graphene due to charged impurities
Péter Boross, András Pályi
Monolayer graphene is an example of materials with multi-valley electronic structure. In such materials, the valley index is being considered as an information carrier. Consequentl…
Shape-sensitive Pauli blockade in a bent carbon nanotube
Gábor Széchenyi, András Pályi
Motivated by a recent experiment [F. Pei et al., Nat. Nanotech. 7, 630 (2012)], we theoretically study the Pauli blockade transport effect in a double quantum dot embedded in a ben…
Probing individual split Cooper-pairs using the spin qubit toolkit
Zoltán Scherübl, András Pályi, Szabolcs Csonka
A superconductor is a natural source of spin-entangled spatially separated electron pairs. Although the first Cooper-pair splitter devices have been realized recently, an experimen…
Maximal Rabi frequency of an electrically driven spin in a disordered magnetic field
Gábor Széchenyi, András Pályi
We present a theoretical study of the spin dynamics of a single electron confined in a quantum dot. Spin dynamics is induced by the interplay of electrical driving and the presence…
Catastrophe optics of caustics in single and bilayer graphene: fine structure of caustics
Csaba Péterfalvi, András Pályi, Ádám Rusznyák +2
We theoretically study the scattering of a plane wave of a ballistic electron on a circular n-p junction in single and bilayer graphene. We compare the exact wave function inside t…