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Bonsen, T.R. (author), Harvey-Collard, P. (author), Russ, M.F. (author), Dijkema, J.J. (author), Sammak, A. (author), Scappucci, G. (author), Vandersypen, L.M.K. (author)We report observations of transitions between excited states in the Jaynes-Cummings ladder of circuit quantum electrodynamics with electron spins (spin circuit QED). We show that unexplained features in recent experimental work correspond to such transitions and present an input-output framework that includes these effects. In new experiments...journal article 2023
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Harvey-Collard, P. (author), Dijkema, J.J. (author), Zheng, G. (author), Sammak, A. (author), Scappucci, G. (author), Vandersypen, L.M.K. (author)We report the coherent coupling of two electron spins at a distance via virtual microwave photons. Each spin is trapped in a silicon double quantum dot at either end of a superconducting resonator, achieving spin-photon couplings up to around gs/2p=40 MHz. As the two spins are brought into resonance with each other, but detuned from the...journal article 2022
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Prabowo, B. (author), Zheng, G. (author), Mehrpoo, M. (author), Patra, B (author), Harvey-Collard, P. (author), Dijkema, J.J. (author), Sammak, Amir (author), Scappucci, G. (author), Charbon-Iwasaki-Charbon, E. (author), Sebastiano, F. (author), Vandersypen, L.M.K. (author), Babaie, M. (author)Quantum computers (QC) promise to solve certain computational problems exponentially faster than a classical computer due to the superposition and entanglement properties of quantum bits (qubits). Among several qubit technologies, spin qubits are a promising candidate for large-scale QC, since (1) they have a small footprint allowing them to...conference paper 2021
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Kawasaki, S. (author), Dijkema, E. (author), Saccher, M. (author), Giagka, Vasiliki (author), Schleipen, J.J.H.B. (author), Dekker, R. (author)In the bioelectronic medicine field, vagus nerve stimulation (VNS) is a promising technique that is expected to treat numerous inflammatory conditions, in addition to the currently FDA approved treatment for epilepsy, depression and obesity [1]. However, current VNS techniques are still limited in the spatial resolution that they can achieve,...conference paper 2021
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Harvey-Collard, P. (author), Zheng, G. (author), Dijkema, J.J. (author), Samkharadze, Nodar (author), Sammak, A. (author), Scappucci, G. (author), Vandersypen, L.M.K. (author)Circuit quantum electrodynamics (QED) employs superconducting microwave resonators as quantum buses. In circuit QED with semiconductor quantum-dot-based qubits, increasing the resonator impedance is desirable as it enhances the coupling to the typically small charge dipole moment of these qubits. However, the gate electrodes necessary to form...journal article 2020
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van der Stam, W. (author), de Graaf, M. (author), Gudjónsdóttir, S. (author), Geuchies, J.J. (author), Dijkema, J.J. (author), Kirkwood, N.R.M. (author), Evers, W.H. (author), Longo, Alessandro (author), Houtepen, A.J. (author)The processes that govern radiative recombination in ternary CuInS<sub>2</sub> (CIS) nanocrystals (NCs) have been heavily debated, but recently, several research groups have come to the same conclusion that a photoexcited electron recombines with a localized hole on a Cu-related trap state. Furthermore, it has been observed that single CIS...journal article 2018
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Verzijlbergh, R.A. (author), De Vries, Laurens (author), Dijkema, G.P.J. (author), Herder, P.M. (author)The integration of large amounts of variable renewable energy poses fundamental challenges to the operation and governance of the energy system. In this article we address the main institutional challenges that are caused by the integration of variable renewable energy sources like solar and wind energy in the European power system. We first...journal article 2017
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Bollinger, L.A. (author), Dijkema, G.P.J. (author)This paper reports the development and results of a model exploring the resilience of the Dutch electricity transmission infrastructure to extreme weather events. Climate change is anticipated to result in an increase in the frequency and severity of extreme weather events over the coming decades. Situated in a low-lying coastal delta, the...journal article 2016
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- Tavasszy, Lorant (author), Bollinger, L.A. (author), Dijkema, G.P.J. (author) journal article 2016
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Chappin, E.J.L. (author), Dijkema, G.P.J. (author)A framework for the modeling and simulation of transitions is presented. A transition, “substantial change in the state of a socio-technical system”, typically unfolds over a long timespan. We therefore suggest to use simulation to inform transition managers on the effect of their decisions. Transition models preferably meet five functional...journal article 2015
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- Ghorbani, A. (author), Bots, P.W.G. (author), Dignum, V. (author), Dijkema, G.P.J. (author) journal article 2013
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Chmieliauskas, A. (author), Chappin, E.J.L. (author), Dijkema, G.P.J. (author)AgentSpring is a new agent-based modeling framework especially suited to model and simulate complex socio-technical systems, such as energy markets or transport infrastructures. Common problems encountered when modeling and analyzing such systems are how to represent the variety of facts that describe the system and how to allow agents to make...conference paper 2012
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Kasmire, J. (author), Dijkema, G.P.J. (author), Nikolic, I. (author)Horticulture, a pillar of the Dutch economy, has already achieved remarkable productivity increases through the use of natural gas for heating, lighting and CO2. Further innovative technologies that could aid the transition toward sustainable energy use, including heat/cold storage and deepgeothermal heat sources, are currently in development...conference paper 2012
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Bollinger, L.A. (author), Dijkema, G.P.J. (author)While we rely on the continuous functioning of infrastructures such as water, electricity and Internet, 100% uptime is not possible. Infrastructure systems must therefore be resilient – they must be capable of flexing in response to disruptions and recovering quickly. In this paper we explore options for supporting infrastructure resilience from...conference paper 2012
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Haruyama, S. (author), Kim, S.K. (author), Beiter, K.A. (author), Dijkema, G.P.J. (author), De Weck, O.L. (author)We developed a new education curriculum called "ALPS" (Active Learning Project Sequence) at Keio University that emphasizes team project-based learning and design thinking with systems engineering techniques. ALPS is a 6 month course, in which students work as a team and design and propose innovative systems. Students identify requirements,...conference paper 2012
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Chmieliauskas, A. (author), Chappin, E.J.L. (author), Davis, C.B. (author), Nikolic, I. (author), Dijkema, G.P.J. (author)Our world is a complex socio-technical system-of-systems (Chappin & Dijkema, 2007; Nikolic, 2009). Embedded within the geological, chemical and biological planetary context, the physical infrastructures, such as power grids or transport networks span the globe with energy and material flows. Social networks in the form of global commerce and the...book chapter 2012
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Nikolic, I. (author), Dijkema, G.P.J. (author)Infrastructure systems for energy, water, transport, information etc. are large scale socio-technical systems that are critical for achieving a sustainable world. They were not created at the current global scale at once, but have slowly evolved from simple local systems, through many social and technical decisions. If we are to understand them...journal article 2010
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Chappin, E.J.L. (author), Dijkema, G.P.J. (author), De Vries, L.J. (author)Carbon taxation and emission trading are policy instruments for achieving significant CO2 emission reduction by inducing a shift in technology and fuel choice. Simulations with a quantitative agent-based model of a competitive electricity generation sector show that under both policies CO2 emissions increase for 10-15 years due to the long life...book chapter 2010
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Van der Star, W.R.L. (author), Dijkema, C. (author), De Waard, P. (author), Picioreanu, C. (author), Strous, M. (author), Van Loosdrecht, M.C.M. (author)The cytoplasm of anaerobic ammonium oxidizing (anammox) bacteria consists of three compartments separated by membranes. It has been suggested that a proton motive force may be generated over the membrane of the innermost compartment, the “anammoxosome”. 31P nuclear magnetic resonance (NMR) spectroscopy was employed to investigate intracellular...journal article 2009
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Davis, C.B. (author), Nikoli?, I. (author), Dijkema, G.P.J. (author)A method is presented that allows for a life cycle assessment (LCA) to provide environmental information on an energy infrastructure system while it evolves. Energy conversion facilities are represented in an agent-based model (ABM) as distinct instances of technologies with owners capable of making decisions based on economic and environmental...journal article 2009
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