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Hendrickx, N.W. (author), Lawrie, W.I.L. (author), Russ, M. (author), van Riggelen, F. (author), de Snoo, S.L. (author), Schouten, R.N. (author), Sammak, A. (author), Scappucci, G. (author), Veldhorst, M. (author)The prospect of building quantum circuits using advanced semiconductor manufacturing makes quantum dots an attractive platform for quantum information processing. Extensive studies of various materials have led to demonstrations of two-qubit logic in gallium arsenide, silicon and germanium. However, interconnecting larger numbers of qubits in...article 2021
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Fu, X. (author), Riesebos, L. (author), Rol, M.A. (author), van Straten, J. (author), van Someren, J. (author), Khammassi, N. (author), Ashraf, I. (author), Vermeulen, R.F.L. (author), Newsum, V. (author), Loh, K.K.L. (author), de Sterke, J.C. (author), Vlothuizen, W.J. (author), Schouten, R.N. (author), Almudever, C.G. (author), Dicarlo, L. (author), Bertels, K. (author)A widely-used quantum programming paradigm comprises of both the data flow and control flow. Existing quantum hardware cannot well support the control flow, significantly limiting the range of quantum software executable on the hardware. By analyzing the constraints in the control microarchitecture, we found that existing quantum assembly...conference paper 2019
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Humphreys, P.C. (author), Kalb, N. (author), Morits, J.P.J. (author), Schouten, R.N. (author), Vermeulen, R.F.L. (author), Twitchen, D.J. (author), Markham, M. (author), Hanson, R. (author)Large-scale quantum networks promise to enable secure communication, distributed quantum computing, enhanced sensing and fundamental tests of quantum mechanics through the distribution of entanglement across nodes1–7. Moving beyond current two-node networks8–13 requires the rate of entanglement generation between nodes to exceed the decoherence ...article 2018
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Fu, X. (author), Rol, M.A. (author), Bultink, C.C. (author), van Someren, J. (author), Khammassi, N. (author), Ashraf, I. (author), Vermeulen, R.F.L. (author), de Sterke, J.C. (author), Vlothuizen, W.J. (author), Schouten, R.N. (author), Almudéver, C.G. (author), DiCarlo, L. (author), Bertels, K. (author)This article proposes a quantum microarchitecture, QuMA. Flexible programmability of a quantum processor is achieved by multilevel instructions decoding, abstracting analog control into digital control, and translating instruction execution with non-deterministic timing into event trigger with precise timing. QuMA is validated by several single...article 2018
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Fu, X. (author), Rol, M.A. (author), Bultink, C.C. (author), van Someren, J. (author), Khammassi, N. (author), Ashraf, I. (author), Vermeulen, R.F.L. (author), De Sterke, J.C. (author), Vlothuizen, W.J. (author), Schouten, R.N. (author), Almudever, C.G. (author), DiCarlo, L. (author), Bertels, K. (author)Quantum computers promise to solve certain problems that are intractable for classical computers, such as factoring large numbers and simulating quantum systems. To date, research in quantum computer engineering has focused primarily at opposite ends of the required system stack: devising high-level programming languages and compilers to...conference paper 2017
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Rol, M.A. (author), Bultink, C.C. (author), O'Brien, T.E. (author), de Jong, S.R. (author), Theis, L.S. (author), Fu, X. (author), Luthi, F. (author), Vermeulen, R.F.L. (author), de Sterke, J.C. (author), Bruno, A. (author), Deurloo, D. (author), Schouten, R.N. (author), Wilhelm, F.K. (author), Dicarlo, L. (author)We present a tuneup protocol for qubit gates with tenfold speedup over traditional methods reliant on qubit initialization by energy relaxation. This speedup is achieved by constructing a cost function for Nelder-Mead optimization from real-time correlation of nondemolition measurements interleaving gate operations without pause. Applying the...article 2017