Center for Quantum Devices

Niels Bohr Institute

Previous QDev-All Group Meetings

List of group meetings 2024

Date	Speaker 1	Speaker 2
17/01	Tsung-Lin Chung _{Title: Analog quantum simulation with triple quantum dot systems}	Torbjørn Rasmussen _{Title: Fully automated coldstart protocol for semiconductor quantum dot tune-up}
14/02	Joachim Sestoft _{Title: Optoelectronic nanowire neurons}	Mercè Roig I Server _{Title: Altermagnetism}
3/04	Zhenhai Sun _{Title: Exploring the relaxation time limit of gatemon qubits}	Cecilie Hermansen _{Title: Triple Quatum Dot Coupled to a Microwave Resonator}
15/05	Vasileios Vlachodimitropoulos _{Title: From coupled quantum dots to resonators on InAs/Al heterostructures.}
12/06	Rune Thinggaard Hansen Title: Idle Evolution Access-Hamiltonian Learning	Bertram Brovang Title: Engineering voltage controlled resonators and interactions between quantum dots and superconducting resonators
28/08	Satyaki Sasmal Title: Gate tuned quantum phase transition in two-dimensional array of superconducting islands

List of group meetings 2023

Date	Speaker 1	Speaker 2
20/01	Mercè Roig I Server _{Title:Superconductivity in Sr2RuO4}	Svend Krøjer Møller _{Title: Overcoming barriers: Fast universal control of a qubit with variable protection}
17/02	Ida Egholm Nielsen _{Title: Dynamics of parafermionic modes}	Jacob Hastrup _{Title: Measuring a quantum expectation value of a single qubit without collapse.}
17/03	(!) No QDev-All group meeting
28/04	Henrik Røising _{Title: Ergodic Archimedean dimers}	Bertram Brovang _{Title:Engineering interactions between quantum dots and superconducting resonators}
12/05	Clara Neerup Breiø _{Title: Interplay of hidden orbital order and superconductivity in CeCoIn5}	Torbjørn Rasmussen _{Title: Online Hamiltonian Esimation with Live Feedback in a Singlet-Triplet Qubit}
19/06	Magnus Rønne Lykkegaard _{Title: Using a current to phase bias superconducting nanowires without the use of loops.}	William Lawrie _{Title: Hole spins in germanium as a host for hybrid quantum information processing}
23/08	Benjamin Joecker _{Title: Utilizing the g-factor anisotropy in Germanium hole dots}	Luca Felix Banszerus _{Title: Towards flat bands in frustrated Josephson junction arrays}
13/09	Vasileios Vlachodimitropoulos _{Title: Measuring quasiparticle poisoning rates in InAs quantum dots}	Rasmus Dalsgaard Schlosser _{Title: Multi-Nanowires, fabrication and implementation}
11/10	Fabrizio Berritta _{Title: Real-time universal control of spin qubits by adaptive Hamiltonian estimation}
29/11	Lazar Lakic _{Title: 2A Proximitized quantum dot in Ge}	Anders Enevold Dahl _{Title: Transport in Andreev Crystals}
13/12	David Feldstein Bofill _{Title: Hybrid Device Technology for Intrinsically Protected Superconducting Qubits}

List of group meetings 2022

Date	Speaker 1	Speaker 2
14/01	Fabrizio Berritta _{Title: Status of industrially fabricated spin qubits: SiMOS, FDSOI, and Si/SiGe.}	Alisa Danilenko _{Title: Quantum Dots as Spectrometers in 2DEG-Based Superconductor-Semiconductor Hybrids}
04/02	Daniel Sanchez _{Title: A bosonic phase coherent insulator and change-vortex duality}
25/03	Xiaojing Zhao _{Title: Visualization of the Local Density of States in the Quantum Well (QW) Heterostructures using Scanning Tunnel Microscopy (STM) and Spectroscopy (STS)}	Dags Olsteins _{Title: On-chip multiplexing enabled by SAG nanowire transistors}
22/04	Morten Holm Christensen _{Title: Topological states in the iron-based superconductors?}	José Manuel Chávez-Garcia ^{Title: Tuning Super-Semiconducting Circuits: Interferometers with Quantum Point Contacts}
20/05	Serwan Asaad _{Title: The parity qubit}
10/06	Jan Adrian Krzywda _{Title:Theory of coherent spin transfer in semiconductor quantum dots}	Jens Schulenborg _{Title: A. Andreev vs. E. Majorana in quantum-dot based parity-to-charge conversion}
26/08	Gunjan Nagda _{Title: Correlating the structural and electrical characteristics of MBE grown InAs SAG nanowires: a statistical study}	Harry Lampadaris _{Title: Quantum dots in isotopically enriched silicon}
16/09	Zhenhai Sun _{Title:Nanowire-based Gatemon with Shadowed SNS Junction}
14/10	Malvika Tripathi _{Title: Magnetic proximity in hybrid ferromagnetic-superconductor-semiconductor structures}	Lorenzo Maffi _{Title: Tricritical Ising Phase Transition in a Ladder of JJA}
16/12	Tsung-Lin Chung _{Title: Analog quantum simulation with triple quantum dot systems}	Clara Cecilie Leve Hermansen _{Title: Electron-photon interaction in quantum dot systems}

List of group meetings 2021

Date	Speaker 1	Speaker 2
22/01	Ida Nielsen ^Title:^{Parafermions – an extension to Majoranas}	Max Geier ^{Title: Non-abelian time-evolution in a chaotic Majorana billiard}
26/02	Rajib Batabyal ^{Title: Susceptibility of Surface and Confined Bulk States against Crystal Defects and Estimation of Screened Coulomb Potential on InAs(111)A Surfaces}	Andreas Poeschl ^Title:^{Nonlocal signatures of hybridization between quantum dot and Andreev bound state}
26/03	Daniel Sanchez ^{Title: Two-dimensional aluminum wire network}	Oscar Erlandsson ^{Title: Circuit-QED with a controlled quantum dot in a gatemon qubit}
23/04	Juan Carlos Estrada Saldana ^{Title: Coulombic subgap states}	Gunjan Nagda ^{Title: Selective Area Growth of III-V Nanowires on High-Index GaAs Substrates}
21/05	Chia-Min Chung ^{Title: Numerical simulation of quantum transport by matrix product state}	Abhishek Banjeree ^{Title: Probing boundary and bulk of a planar Josephson junction}
11/06	Martin Espineira _{Title: : Source and Sink Selective Area Growth Modes of Semiconductor Nanowires}	José Manuel Chavez-Garcia _{Title: Protecting Qubits with Super-Semiconducting Circuits}
27/08	Michaela Eichinger ^{Title: Towards inorganic shadow masks for superconducting qubit fabrication}
24/09	Joachim Sestoft _{Title: Scalable platform for nanocrystal-based quantum electronics.}	Steffen Zelzer _{Title: Cross-sectional Scanning Tunneling Microscopy – An update}
15/10	Matteo Wauters _{Title: Variational hybrid algorithms for quantum optimization}	Tobias Særkjær _{Title: Equilibrium Nanowire Morphologies}
17/12	Svend Krøjer Møller _{Title: Demonstrating Majorana nonabelian properties using fast adiabatic charge-transfer}	Andrea Maiani _{Title: Transport symmetries in multiterminal semiconductor-superconductor hybrid devices}

List of group meetings 2020

Date	Speaker 1	Speaker 2
31/01	Martin Espiñeira ^{Title: Structural characterization of SAG nanowires}	Jens Schulenborg ^{Title: Absence of supercurrent sign reversal in a topological junction with a quantum dot}
28/02	Yu Liu ^{Title: Semiconductor/Ferromagnetic Insulator InAs/EuS Epitaxy}	Heorhii Bohuslavskyi ^{Title: Two-dimensional arrays of quantum dots in silicon nanowire multi-gate transistors}
03/04	Joachim Sestoft ^{Title: What's next in hybrid nanowire devices?}
24/04	Alexander Whiticar ^{Title: 0-π phase transitions in spinful Josephson junctions}	Frederik Nathan ^{Title: Universal Lindblad equation for open quantum systems}
19/06	Daria Beznasiuk ^{Title: Peculiarities of selective-area grown InAs nanowires on GaAs by molecular beam epitaxy.}	Anasua Chatterjee ^{Title: Sparse measurement of high-dimensional Coulomb diamonds}
21/08	Felix Passmann _{Title: The Hell-Wire - Exploring a new approach towards 1D wire structures in hybrid 2D electron gases}	Steffen Zelzer _{Title: LT Nanoprobe 4P STM and MBE Tools in Lyngby - Capabilities, Results and Prospects}
18/09	Alexandros Vekris _{Title: Hybrid superconductor-double-nanowire devices}	Alisa Danilenko _{Title: Controlling junction properties in half-shell nanowire transmon devices}
30/10	Andrea Maiani _{Title: Topological superconductivity in semiconductor-superconductor-magnetic insulators heterostructures.}	Dags Olsteins _{Title: Gateability of critical current in junctionless semiconductor/superconductor nanowires.}
27/11	Albert Hertel _{Title: Towards voltage controlled superconducting qubit with selective area grown superconductor-semiconductor hybrid structures on silicon}	Harry Lampadaris _{Title: III-V/Sn hybrid nanowires}
11/12	Anders Kringhøj _{Title: Voltage control of charge quantization effects in a gatemon qubit}

List of group meetings 2019

Date	Speaker 1	Speaker 2
18/01	Anasua Chatterjee ^{Title: Spin qubits enter the second dimension}	Anders Kringhøj ^{Title: Full-shell gatemon qubits with leads}
15/02	Albert Hertel ^{Title: Superconducting gatemon qubits based on selective-area-grown semiconductor materials}	Thomas Nordqvist ^{Title: A materials study}
15/03	Saulius Vaitiekénas ^{Title: Quantum Phase Transitions in Re-Entrant Destructive Superconductors}	Frederik Nathan ^{Title: Topological frequency conversion in a driven dissipative quantum cavity}
05/04	Damon Carrad ^{Title: Superconductor/semiconductor hybrid devices grown using the substrate as a shadow mask}	Federico Fedele ^{Title: Current pumping trajectories of single electrons through a double quantum dot}
14/06	Mark Rudner ^{Title: Spontaneous magnetization via Berryogenesis in driven electronic systems}	Oscar Erlandsson ^{Title: Charge-parity switching in a hybrid nanowire device.}
19/07	Natalie Pearson ^{Title: Efficient Hamiltonian Learning}	Lukas Stampfer ^{Title: Full-Shell Al Nanowire SQUIDs}
16/08	Tommy Li ^{Title: High-temperature superconductivity in semiconductor artificial graphene}	Jordan Kang ^{Title: Enhancement of Carrier Mobility of Selective Area Grown InAs Nanowires on GaAs(001) substrate with InxGa1-xAs/GaAs(Sb) buffer layers}
13/09	Lukas Stampfer ^{Title: Electron transport in In(As)Sb Nanocrosses}	Deividas Sabonis ^{Title: Detecting Andreev bound state via charge sensing in a superconducting island.}
18/10	Asbjorn Drachmann ^{Title:Revolutionizing In-Situ Grown Superconductor on III/V Systems with Anodic Oxidation}	Fabio Ansaloni ^{Title: Split-gate-induced 2x2 array of single-electron dots in silicon-on-insulator}
8/11	Abhishek Banerjee ^{Title: Phase control of zero energy modes in a topological Josephson junction}	Andreas Pöschl ^{Title: Non-local conductance measurements in super-semi hybrid systems}
13/12	Juan Carlos Estrada Saldaña ^{Title: DC transport in hybrid wires}	Gorm Steffensen T^{itle: Paperflip: A Story of Multiorbital Supercurrent}

List of group meetings 2018

Date	Speaker 1	Speaker 2	Speaker 3
19/01	Filip Krizek ^{Title: Selective area grown nanowire networks}	Frederik Nathan ^{Title: Stability of the anomalous Floquet phases}	Deividas Sabonis ^{Title: The power of half: Results towards Majorana-assisted charge qubit}
16/02	Panagiotis Kotetes ^{Title: Hybridization at superconductor-semiconductor interfaces}	Saulius Vaitikenas ^{Title: Selective area grown hybrids: how does it taste?}	Mingtang Deng ^{Title: Andreev Bound States in a Ring}
23/03	Tommy Li ^{Title: Multi-level dynamics and decoherence in a two-island Majorana qbit}	Sergej Schuwalov ^{Title: Probing InAs and InAs/Al heterostructure interfaces with angle-resolved soft X-ray spectroscopy}	Lukas Stamper ^{Title: Multiterminal Josephson Junctions}
20/04	Ajit Balram ^{Title: Current induced gap opening in interacting topological insulators}	Malcolm Connolly ^{Title:Towards a 2DEG Andreev qubit}	Antonio Fornieri ^{Title: Coherent transport in superconductor/semiconductor quantum dots}
25/05	David van Zanten ^{Title: Microwave and bias spectroscopy of bound state – insulator – bound state transport}	Esben Bork Hansen ^{Title: Electron-hole components of subgap states in Coulomb blockadedMajorana islands}
15/06	Dovydas Razmadze ^{Title: Warmup steps for Majorana based qubit in hybrid semiconductor devices.}	Gerbold Ménard ^{Title: Anti-poisoning filter in a nanowire}	Raffael Gawatz ^{Title: Realizing Universal Dynamics Through Heating}
13/07	Thorvald Wadum Larsen ^{Title: Developing a cQED-based Majorana Zero Mode Detector}	Morten Munk-Nielsen ^{Title: Dephasing of Majorana qubits in infinite nanowires with local noise}
05/10	Sabbir Khan ^{Title: Controlled Synthesis of a Large Scale Semiconductor Nanowire Networks}	Juan Carlos Estrada Saldana ^{Title: The ground of a double quantum dot with superconducting leads}
02/11	Michele Burello ^{Title: Dyonic zero-energy modes}	Martin Bjergfeldt ^{Title: Shadow mask platform for in-situ patterning of superconductor on InAs nanowires}
14/12	Alexander Whiticar ^{Title: Evidence of topological superconductivity in planar Josephson juctions}	Esteban Martinez ^{Title: Observing pairs of zero-bias end states in three-terminal Superconductor- Semiconductor devices}

List of group meetings 2017

Date	Speaker 1	Speaker 2	Speaker 3
10/02	David van Zanten	Panagiotis Kotetes	Ajit C Balram
10/03	Filip Křížek	Erikas Gaidamauskas	Shunji Matsuura
7/04	Rawa Tanta	Morten Munk-Nielsen	Morten Hels
4/05	Thorvald Wadum Larsen ^{Title: Engineering Superconducting Circuits for Protected Qubits}	Saulius Vaitiekėnas T^{itle: Gate Controlled g-factor and Topological Gap in Majorana Nanowires}	Michael Alan Schecter ^{Title: Ising transition in the two-dimensional Heisenberg model}
2/06	Samuel Sanchez	Lucas Casparis ^{Title: Introducing the 2DEG gatemon}	Michael Hell ^{Title: Distinguishing nonlocal Majorana bound states from local Andreev bound states with interferometry}
30/06	Alexander Whiticar ^{Title: Aharonov- Bohm oscillations in a mesoscopic ring coupled to a superconducting quantum dot}	Peter Krogstrup	Anders Kringhøj ^{Title: Exploring the semiconductor Josephson juncton of the gatemon}
28/07	Fabrizio Nichele ^{Title: Majorana modes in superconducting InAs/Al two-dimensional heterostructures}	Federico Fedele	Mingtang Deng
25/08	Gerbold Ménard ^{Title: The (long) road to the Majorana qubit}	Robert McNeil ^{Title: A (short) road to many qubits - via the alignment of nanowires in a wafer-scale format using dielectrophoresis}
22/09	Eoin O'Farrell ^{Title: Bound state spectroscopy of hybrid superconductor semiconductor quantum dots}	Jonas Skovlund Madsen ^{Title: Imaging Scatterometry for characterization of nanostructures}	Filip Malinowski ^{Title: Spin qubit tricks for Majoranas}
20/10	Ervand Kandelaki ^{Title: Many-body dynamics and gap opening in interacting periodically driven systems}	Natalie Pearson ^{Title: Quantum Simulations on Superconducting Qubits}	Damon Carrad ^{Title: Crystal-phase quantum dots in InAs nanocrosses}
24/11	Rawa Tanta ^{Title: Raman spectroscopy for characterization of nanowires.}	Hung Nguyen ^{Title: Fast sensing of quasiparticle poisoning in InAs/Al superconducting island.}	Michele Burrello ^{Title: From nanowires with spin-orbit coupling to chiral ladders and quantum Hall states.}
21/12	Karl Petersson ^{Title:Superconducting circuits to probe Majorana zero modes}	Asbjørn Drachmann ^{Title: The Optimal Superconductor for 2DEG Majorana Experiments}	Fabio Ansaloni: ^{Title: Fabrication and characterization of quantum dots in Si based materials for spin qubit application.}