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Wesdorp, J.J. (author), Vaartjes, A. (author), Grünhaupt, L. (author), Roelofs, S.R. (author), Splitthoff, L.J. (author), Pita-Vidal, Marta (author), Bargerbos, A. (author), Kouwenhoven, Leo P. (author), Andersen, C.K. (author)Andreev bound states are fermionic states localized in weak links between superconductors which can be occupied with spinful quasiparticles. Microwave experiments using superconducting circuits with InAs/Al nanowire Josephson junctions have recently enabled probing and coherent manipulation of Andreev states but have remained limited to zero...journal article 2024
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Splitthoff, L.J. (author), Wesdorp, J.J. (author), Pita-Vidal, Marta (author), Bargerbos, A. (author), Liu, Yu (author), Andersen, C.K. (author)Superconducting parametric amplifiers play a crucial role in the preparation and readout of quantum states at microwave frequencies, enabling high-fidelity measurements of superconducting qubits. Most existing implementations of these amplifiers rely on the nonlinearity from Josephson junctions, superconducting quantum interference devices,...journal article 2024
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Andersen, Rasmus (author), Napoleone, A. (author), Andersen, Ann Louise (author), Brunoe, Thomas Ditlev (author), Nielsen, Kjeld (author)Pursuing manufacturing competitiveness in the dynamic industrial landscape necessitates implementing changeable and reconfigurable manufacturing systems (RMS) capable of rapid adaptation to varying functionalities and capacities. However, current manufacturing system development methods often overlook product-driven changes during the system...journal article 2024
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Pita-Vidal, Marta (author), Wesdorp, J.J. (author), Splitthoff, L.J. (author), Bargerbos, A. (author), Liu, Yu (author), Kouwenhoven, Leo P. (author), Andersen, C.K. (author)Andreev spin qubits have recently emerged as an alternative qubit platform with realizations in semiconductor–superconductor hybrid nanowires. In these qubits, the spin degree of freedom of a quasiparticle trapped in a Josephson junction is intrinsically spin–orbit coupled to the supercurrent across the junction. This interaction has...journal article 2024
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Bargerbos, A. (author), Splitthoff, L.J. (author), Pita-Vidal, Marta (author), Wesdorp, J.J. (author), Liu, Yu (author), Krogstrup, Peter (author), Kouwenhoven, Leo P. (author), Andersen, C.K. (author), Grünhaupt, L. (author)Quantum error correction will be an essential ingredient in realizing fault-tolerant quantum computing. However, most correction schemes rely on the assumption that errors are sufficiently uncorrelated in space and time. In superconducting qubits, this assumption is drastically violated in the presence of ionizing radiation, which creates bursts...journal article 2023
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Bargerbos, A. (author), Pita-Vidal, Marta (author), Žitko, Rok (author), Splitthoff, L.J. (author), Grünhaupt, L. (author), Wesdorp, J.J. (author), Liu, Yu (author), Kouwenhoven, Leo P. (author), Aguado, Ramón (author), Andersen, C.K. (author), Kou, Angela (author), van Heck, Bernard (author)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 quasiparticle. Because of spin-orbit coupling, we resolve two flux-sensitive branches in the transmon spectrum, depending on the spin of the quasiparticle. A finite...journal article 2023
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Pita-Vidal, Marta (author), Bargerbos, A. (author), Splitthoff, L.J. (author), Grünhaupt, L. (author), Wesdorp, J.J. (author), Liu, Yu (author), Kouwenhoven, Leo P. (author), van Heck, Bernard (author), Andersen, C.K. (author)Spin qubits in semiconductors are a promising platform for producing highly scalable quantum computing devices. However, it is difficult to realize multiqubit interactions over extended distances. Superconducting spin qubits provide an alternative by encoding a qubit in the spin degree of freedom of an Andreev level. These Andreev spin qubits...journal article 2023
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Seviour, R (author), Tooker, Nick (author), Vainio, Pirjo (author), Dueholm, Morten Kam Dahl (author), Nierychlo, Marta (author), Andersen, Kasper Skytte (author), van Loosdrecht, Mark C.M. (author), Weissbrodt, D.G. (author), Rossetti, S (author)Microbial communities are responsible for biological wastewater treatment, but our knowledge of their diversity and function is still poor. Here, we sequence more than 5 million high-quality, full-length 16S rRNA gene sequences from 740 wastewater treatment plants (WWTPs) across the world and use the sequences to construct the ‘MiDAS 4’...journal article 2022
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Andersen, C.K. (author)Many quantum applications require the careful preparation of quantum harmonic oscillators. The combination of a high-power microwave drive and weak nonlinearity enables fast control of such systems, with implications for quantum computing and metrologyjournal article 2022
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Bargerbos, A. (author), Pita-Vidal, Marta (author), Splitthoff, L.J. (author), Grünhaupt, L. (author), Wesdorp, J.J. (author), Andersen, C.K. (author), Liu, Yu (author), Kouwenhoven, Leo P. (author), van Heck, B. (author)We realize a hybrid superconductor-semiconductor transmon device in which the Josephson effect is controlled by a gate-defined quantum dot in an InAs-Al nanowire. Microwave spectroscopy of the transition spectrum of the transmon allows us to probe the ground-state parity of the quantum dot as a function of the gate voltages, the external...journal article 2022
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Chinazzo, Giorgia (author), Andersen, Rune Korsholm (author), Azar, Elie (author), Barthelmes, Verena M. (author), Becchio, Cristina (author), Berger, Christiane (author), Carlucci, Salvatore (author), Crosby, Sarah (author), Gauthier, Stephanie (author), Luna-Navarro, Alessandra (author)The perception, physiology, behavior, and performance of building occupants are influenced by multi-domain exposures: the simultaneous presence of multiple environmental stimuli, i.e., visual, thermal, acoustic, and air quality. Despite being extensive, the literature on multi-domain exposures presents heterogeneous methodological approaches...review 2022
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Ciani, A. (author), Varbanov, B.M. (author), Jolly, N.E.A. (author), Andersen, C.K. (author), Terhal, B.M. (author)We propose and analyze two types of microwave-activated gates between a fluxonium and a transmon qubit, namely a cross-resonance (CR) and a CPHASE gate. The large frequency difference between a transmon and a fluxonium makes the realization of a two-qubit gate challenging. For a medium-frequency fluxonium qubit, the transmon-fluxonium system...journal article 2022
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Splitthoff, L.J. (author), Bargerbos, A. (author), Grünhaupt, L. (author), Pita-Vidal, Marta (author), Wesdorp, J.J. (author), Liu, Yu (author), Kou, Angela (author), Andersen, C.K. (author), van Heck, B. (author)We report the detection of a gate-tunable kinetic inductance in a hybrid InAs/Al nanowire. For this purpose, we embed the nanowire into a quarter-wave coplanar waveguide resonator and measure the resonance frequency of the circuit. We find that the resonance frequency can be changed via the gate voltage that controls the electron density of...journal article 2022
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van Beek, Maarten T. (author), Viré, A.C. (author), Andersen, Søren J. (author)Wind farms experience significant efficiency losses due to the aerodynamic interaction between turbines. A possible control technique to minimize these losses is yaw-based wake steering. This paper investigates the potential for improved performance of the Lillgrund wind farm through a detailed calibration of a low-fidelity engineering model...journal article 2021
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Mahdavi, Ardeshir (author), Ampatzi, Eleni (author), Andersen, Rune Korsholm (author), Barthelmes, Verena M (author), Favero, Matteo (author), Hahn, Jakob (author), Knudsen, Henrik N (author), Luna-Navarro, Alessandra (author), Roetzel, Astrid (author)Buildings’ expected (projected, simulated) energy use frequently does not match actual observations. This is commonly referred to as the energy performance gap. As such, many factors can contribute to the disagreement between expectations and observations. These include, for instance, uncertainty about buildings’ geometry, construction, systems,...journal article 2021
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Abdalla, S. (author), Kolachina, A. (author), Adusumilli, S. (author), Bhowmick, A (author), Alou-Font, E. (author), Amarouche, L. (author), Andersen, OB (author), Naeije, M.C. (author), Simons, W.J.F. (author)In 2018 we celebrated 25 years of development of radar altimetry, and the progress achieved by this methodology in the fields of global and coastal oceanography, hydrology, geodesy and cryospheric sciences. Many symbolic major events have celebrated these developments, e.g., in Venice, Italy, the 15th (2006) and 20th (2012) years of progress and...journal article 2021
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Chatzopoulos, Damianos (author), Cho, Doohee (author), Bastiaans, Koen M. (author), Steffensen, Gorm O. (author), Bouwmeester, D. (author), Akbari, Alireza (author), Gu, Genda (author), Paaske, Jens (author), Andersen, Brian M. (author), Allan, Milan P. (author)By using scanning tunneling microscopy (STM) we find and characterize dispersive, energy-symmetric in-gap states in the iron-based superconductor FeTe<sub>0.55</sub>Se<sub>0.45</sub>, a material that exhibits signatures of topological superconductivity, and Majorana bound states at vortex cores or at impurity locations. We use a...journal article 2021
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Møller, Mette (author), Andersen, Sandra Krogh (author), Bonde, Nanna (author), Hagenzieker, Marjan (author)Introduction: Moped riders have a comparably high risk of getting seriously injured or killed in road traffic crashes. The moped is the first motor vehicle legally available to adolescents, but knowledge about young moped riders is limited. The few existing studies indicate that violations are a key factor in crash involvement. Method: Using...journal article 2021
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Andersen, Jonas Siim (author), Miccini, Riccardo (author), Serafin, Stefania (author), Spagnol, S. (author)Previous research stresses the importance of Head-Related Transfer Function (HRTF) individualization approaches for accurately locating sound sources in virtual 3D spaces. However, in the realm of interactive experiences, methods for assessing whether individualized HRTFs bring a benefit to the player experience are rarely investigated. Methods...conference paper 2021
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Lee, Minha (author), Noortman, Renee (author), Zaga, Cristina (author), Starke, Alain (author), Huisman, G. (author), Andersen, Kristina (author)We present a vision for conversational user interfaces (CUIs) as probes for speculating with, rather than as objects to speculate about. Popular CUIs, e.g., Alexa, are changing the way we converse, narrate, and imagine the world(s) to come. Yet, current conversational interactions normatively may promote non-desirable ends, delivering a...conference paper 2021