576 citations · 5.2k across the 121 of their papers we have counts for
121 papers
Spin polarisation signatures of Fractionally Charged Skyrmions in Fractional Quantum Hall states
Odysseas Williams, Stefan Faelt, Christian Reichl +1
We investigate spin polarisation and low-energy excitations in fractional quantum Hall (FQH) states using cavity-polariton spectroscopy of high-mobility GaAs quantum wells. By meas…
Frequency-resolved decoherence spectroscopy of a semiconductor charge qubit coupled to a high-impedance resonator
Ekaterina Al-Tavil, Wonjin Jang, David J. van Woerkom +10
Superconducting resonators coupled to semiconductor quantum dots provide a powerful platform to investigate light-matter interaction and decoherence mechanisms in solid-state quant…
Compact self-matched gyrators using edge magnetoplasmons
Aldo Tarascio, Yiqi Zhao, Rafael S. Eggli +5
Edge magnetoplasmons provide a natural platform for chiral electrodynamics, where broken time-reversal symmetry enforces unidirectional propagation. When probed at microwave freque…
Impact of Layer Structure and Strain on Morphology and Electronic Properties of InAs Quantum Wells on InP (001)
Zijin Lei, Yuze Wu, Christian Reichl +2
High-quality InAs quantum wells grown on InP are a promising platform for topological quantum information processing due to their large g-factor, strong Rashba spin-orbit interacti…
An InAsSb surface quantum well with in-situ deposited Nb as a platform for semiconductor-superconductor hybrid devices
Sjoerd Telkamp, Zijin Lei, Tommaso Antonelli +7
We present a novel semiconductor-superconductor hybrid material based on a molecular beam epitaxially grown InAsSb surface quantum well with an in-situ deposited Nb top layer. Rela…
Entropy of a double quantum dot
David Kealhofer, Christoph Adam, Max J. Ruckriegel +7
We use charge sensing to detect entropy changes in a double quantum dot defined by electrostatic gating of a GaAs/AlGaAs heterostructure. This system can be tuned to be two separat…
High-Efficiency Tunable Microwave Photon Detector Based on a Semiconductor Double Quantum Dot Coupled to a Superconducting High-Impedance Cavity
Fabian Oppliger, Wonjin Jang, Aldo Tarascio +6
High-efficiency single-photon detection in the microwave domain is a key enabling technology for quantum sensing, communication, and information processing. However, the extremely…
Charge Transfer Dynamics in an Electron-Hole Bilayer Device: Capacitance Oscillations and Hysteretic Behavior
Miranda Leigh Davis, Simon Parolo, Sandro Agostini +3
The capacitance and differential conductance of MBE-grown AlGaAs/GaAs p-i-n diodes are investigated. In these diodes, the p-doped layer, an adjacent intrinsic spacer, and a central…
Cavity QED Control of Quantum Hall Stripes
Lorenzo Graziotto, Josefine Enkner, Sambuddha Chattopadhyay +7
Controlling quantum phases of materials with vacuum field fluctuations in engineered cavities is a novel route towards the optical control of emergent phenomena. We demonstrate, us…
Memory resistor based in GaAs 2D-bilayers: In and out of equilibrium
Christian Marty, Zijin Lei, Saverio Silletta +3
Resonant tunneling between closely spaced two dimensional electron gases is a single particle phenomenon that has sparked interest for decades. High tunneling conductances at equal…
Development of a Nb-based semiconductor-superconductor hybrid platform
Sjoerd Telkamp, Tommaso Antonelli, Clemens Todt +12
Semiconductor-superconductor hybrid materials are used as a platform to realise Andreev bound states, which hold great promise for quantum applications. These states require transp…
Enhanced fractional quantum Hall gaps in a two-dimensional electron gas coupled to a hovering split-ring resonator
Josefine Enkner, Lorenzo Graziotto, Dalin Boriçi +7
The magnetotransport of a high-mobility two-dimensional electron gas coupled to a hovering split-ring resonator with controllable distance is studied in the quantum Hall regime. Th…
Testing the Renormalization of the von Klitzing Constant by Cavity Vacuum Fields
Josefine Enkner, Lorenzo Graziotto, Felice Appugliese +7
In light of recent developments demonstrating the impact of cavity vacuum fields inducing the breakdown of topological protection in the integer quantum Hall effect, a compelling q…
Long distance electron-electron scattering detected with point contacts
Lev V. Ginzburg, Yuze Wu, Marc P. Röösli +15
We measure electron transport through point contacts in an electron gas in AlGaAs/GaAs heterostructures and graphene for a range of temperatures, magnetic fields and electron densi…
Nonlinear response of 2DEG in the quantum Hall regime
Shuichi Iwakiri, Lev V. Ginzburg, Marc P. Röösli +7
Breaking of inversion symmetry leads to nonlinear and nonreciprocal electron transport, in which the voltage response does not invert with the reversal of the current direction. Ma…
Development of Nb-GaAs based superconductor semiconductor hybrid platform by combining in-situ dc magnetron sputtering and molecular beam epitaxy
Clemens Todt, Sjoerd Telkamp, Filip Krizek +10
We present Nb thin films deposited in-situ on GaAs by combining molecular beam epitaxy and magnetron sputtering within an ultra-high vacuum cluster. Nb films deposited at varying p…
Josephson-like tunnel resonance and large Coulomb drag in GaAs-based electron-hole bilayers
M. L. Davis, S. Parolo, C. Reichl +2
Bilayers consisting of two-dimensional (2D) electron and hole gases separated by a 10 nm thick AlGaAs barrier are formed by charge accumulation in epitaxially grown GaAs. Both vert…
Controlled generation and detection of a thermal bias in Corbino devices under the quantum Hall regime
Mariano A. Real, Alejandra Tonina, Liliana Arrachea +4
We present an experimental technique to generate and measure a temperature bias in the quantum Hall effect of GaAs/AlGaAs Corbino samples. The bias is generated by injecting an ele…
Long-range electron-electron interactions in quantum dot systems and applications in quantum chemistry
Johannes Knörzer, Cornelis J. van Diepen, Tzu-Kan Hsiao +6
Long-range interactions play a key role in several phenomena of quantum physics and chemistry. To study these phenomena, analog quantum simulators provide an appealing alternative…
Spin-Selective Equilibration among Integer Quantum Hall Edge Channels
G. Nicoli, C. Adam, M. P. Röösli +6
The equilibration between quantum Hall edge modes is known to depend on the disorder potential and the steepness of the edge. Modern samples with higher mobilities and setups with…
Characterization of quasiparticle tunneling in a quantum dot from temperature dependent transport in the integer and fractional quantum Hall regime
Marc P. Röösli, Michael Hug, Giorgio Nicolí +6
We report on magnetoconductance measurements through a weakly coupled quantum dot, containing roughly 900 electrons, in a wide magnetic field range from 0 T to 12 T. We find modula…
Breakdown of the topological protection by cavity vacuum fields in the integer quantum Hall effect
Felice Appugliese, Josefine Enkner, Gian Lorenzo Paravicini-Bagliani +6
The control of the electronic properties of materials via the vacuum fields of cavity electromagnetic resonators is one of the emerging frontiers of condensed matter physics. We sh…
Capacitance and conductance oscillations from electron tunneling into high energy levels of a quantum well in a p-i-n diode
S. Parolo, M. Lupatini, E. Külah +3
Two-dimensional electron and hole gases separated by a few nm from each other are produced in p-i-n diodes based upon MBE-grown GaAs/AlGaAs heterostructures. At such interlayer dis…
In-situ Tuning of the Electric Dipole Strength of a Double Dot Charge Qubit: Charge Noise Protection and Ultra Strong Coupling
P. Scarlino, J. H. Ungerer, D. J. van Woerkom +10
Semiconductor quantum dots, where electrons or holes are isolated via electrostatic potentials generated by surface gates, are promising building blocks for semiconductor-based qua…