48 citations · 240 across the 16 of their papers we have counts for
16 papers
Quantum dynamics of semiconductor quantum dot Josephson junctions
Utkan Güngördü, Rusko Ruskov, Silas Hoffman +3
Josephson junctions constructed from superconductor-semiconductor-superconductor heterostructures have been used to realize a variety of voltage-tunable superconducting quantum dev…
Nonadiabatic quantum control of quantum dot arrays with fixed exchange using Cartan decomposition
David W. Kanaar, Utkan Güngördü, J. P. Kestner
In semiconductor spin qubits which typically interact through short-range exchange coupling, shuttling of spin is a practical way to generate quantum operations between distant qub…
Majorana bound states with chiral magnetic textures
Utkan Güngördü, Alexey A. Kovalev
The aim of this Tutorial is to give a pedagogical introduction into realizations of Majorana fermions, usually termed as Majorana bound states (MBS), in condensed matter systems wi…
Two-qubit CZ gates robust against charge noise in silicon while compensating for crosstalk using neural network
David W. Kanaar, Utkan Güngördü, J. P. Kestner
The fidelity of two-qubit gates using silicon spin qubits is limited by charge noise. When attempting to dynamically compensate for charge noise using local echo pulses, crosstalk…
Robust quantum gates using smooth pulses and physics-informed neural networks
Utkan Güngördü, J. P. Kestner
The presence of decoherence in quantum computers necessitates the suppression of noise. Dynamically corrected gates via specially designed control pulses offer a path forward, but…
Simulated Randomized Benchmarking of a Dynamically Corrected Cross-Resonance Gate
R. K. L. Colmenar, Utkan Güngördü, J. P. Kestner
We theoretically consider a cross-resonance (CR) gate implemented by pulse sequences proposed by Calderon-Vargas & Kestner, Phys. Rev. Lett. 118, 150502 (2017). These sequences mit…
Magnetic skyrmion bubble motion driven by surface acoustic waves
Rabindra Nepal, Utkan Güngördü, Alexey A. Kovalev
We study the dynamical control of a magnetic skyrmion bubble by using counter-propagating surface acoustic waves (SAWs) in a ferromagnet. First, we determine the bubble mass and de…
Stabilization and control of Majorana bound states with elongated skyrmions
Utkan Güngördü, Shane Sandhoefner, Alexey A. Kovalev
We show that elongated magnetic skyrmions can host Majorana bound states in a proximity-coupled two-dimensional electron gas sandwiched between a chiral magnet and an -wave supe…
Theory of magnon motive force in chiral ferromagnets
Utkan Güngördü, Alexey A. Kovalev
We predict that magnon motive force can lead to temperature dependent, nonlinear chiral damping in both conducting and insulating ferromagnets. We estimate that this damping can si…
Parafermion stabilizer codes
Utkan Güngördü, Rabindra Nepal, Alexey A. Kovalev
We define and study parafermion stabilizer codes which can be viewed as generalizations of Kitaev's one dimensional model of unpaired Majorana fermions. Parafermion stabilizer code…
Magnetization pumping and dynamics in a Dzyaloshinskii-Moriya magnet
Alexey A. Kovalev, Utkan Güngördü
We formulate a phenomenological description of thin ferromagnetic layers with inversion asymmetry where the single-domain magnetic dynamics experiences magnon current-induced torqu…
Nonadiabatic holonomic one-qubit gates
Takumi Nitanda, Utkan Güngördü, Mikio Nakahara
Adiabatic quantum gate implementation generally takes longer time, which is disadvantageous in view of decoherence. In this report we implement several essential one-qubit quantum…
Recursive encoding and decoding of the noiseless subsystem for qudits
Utkan Güngördü, Chi-Kwong Li, Mikio Nakahara +2
We give a full explanation of the noiseless subsystem that protects a single-qubit against collective errors and the corresponding recursive scheme described by C.-K. Li et. al. [P…
Non-Adiabatic Universal Holonomic Quantum Gates Based on Abelian Holonomies
Utkan Güngördü, Yidun Wan, Mikio Nakahara
We implement a non-adiabatic universal set of holonomic quantum gates based on abelian holonomies using dynamical invariants, by Lie-algebraic methods. Unlike previous implementati…
Dynamical invariants for quantum control of four-level systems
Utkan Güngördü, Yidun Wan, Mohammad Ali Fasihi +1
We present a Lie-algebraic classification and detailed construction of the dynamical invariants, also known as Lewis-Riesenfeld invariants, of the four-level systems including two-…
Minimal and Robust Composite Two-Qubit Gates with Ising-Type Interaction
Tsubasa Ichikawa, Utkan Güngördü, Masamitsu Bando +2
We construct a minimal robust controlled-NOT gate with an Ising-type interaction by which elementary two-qubit gates are implemented. It is robust against inaccuracy of the couplin…