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PhD student

Sjaak van Diepen

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Room F233
Lab room F008
c.j.vandiepen@[tudelft.nl]
+31 (0)15 2781183
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Vandersypen Lab

Sjaak van Diepen grew up on a dairy farm near the dike Hondsbossche Zeewering at the coast of the North Sea. He moved to Utrecht for his studies in Physics and Mathematics, during which he took an internship at FOM Rijnhuizen for experiments on plasma pulses and heat-resistant materials for nuclear fusion reactors [1]. He obtained a master’s degree in Theoretical Physics with a thesis on the stability of a Bose-Einstein condensate of magnons. After his studies he worked as a researcher at TNO in the department specialized in computer vision.

During a project on automated device tuning [2] Sjaak became intrigued by research on quantum simulations [3], which led him to start a PhD (2017) in the lab of Lieven Vandersypen to perform experiments with gate-defined quantum dot arrays. During his PhD he worked on the tune-up of larger quantum dot arrays [4] and the control of multiple tunnel couplings [5].

Recently, inspired by the behavior of toppling dominoes, he demonstrated the readout of spins distant from the charge sensor by inducing a cascade of electron transitions [6]. Since then he continued to work with quantum dot arrays to perform quantum simulations.

[1] G. De Temmerman, J.J. Zielinski, C.J. van Diepen, L. Marot, and M. Price, Nuclear Fusion 51, 073008 (2011).
[2] C.J. van Diepen, P.T. Eendebak, B.T. Buijtendorp, U. Mukhopadhyay, T. Fujita, C. Reichl, W. Wegscheider, and L.M.K. Vandersypen, Applied Physics Letters 113, 033101 (2018).
[3] C. Volk, A.M.J. Zwerver, U. Mukhopadhyay, P.T. Eendebak, C.J. van Diepen, J.P. Dehollain, T. Hensgens, T. Fujita, C. Reichl, W. Wegscheider, and L.M.K. Vandersypen, npj Quantum Information 5, 29 (2019).
[4] T. Hensgens, T. Fujita, L. Janssen, Xiao Li, C.J. van Diepen, C. Reichl, W. Wegscheider, S. Das Sarma, and L.M.K. Vandersypen, Nature 548, 70-73 (2017).
[5] T.-K. Hsiao, C.J. van Diepen, U. Mukhopadhyay, C. Reichl, W. Wegscheider, and L.M.K. Vandersypen, Physical Review Applied 13, 054018 (2020).
[6] C.J. van Diepen, T.-K. Hsiao, U. Mukhopadhyay, C. Reichl, W. Wegscheider, and L.M.K. Vandersypen, Nature Communications 12, 77 (2021).

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