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Superconducting flux qubits: Quantum chains and tunable qubits

Paauw, F.G. (author)

This thesis presents results of theoretical and experimental work on superconducting persistent-current flux quantum bits. These qubits are promising candidates for the implementation of scalable quantum information processing. This work focuses on the study of one dimensional chains of inductively coupled flux qubits and on qubits with a...

doctoral thesis 2009

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Development of Quantitative electron nano-diffraction

Kumar, V. (author)

This thesis is a step towards development of quantitative parallel beam electron nano-diffraction (PBED). It is focused on the superstructure determination of zig-zag and zig-zig NaxCoO2 and analysis of charge distribution in the two polymorphs Nb12O29 using PBED. It has been shown that quantitative electron nano-diffraction (parallel beam) has...

doctoral thesis 2009

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Computation of mutual fitness by competing bacteria

Keymer, J.E. (author), Galajda, P. (author), Lambert, G. (author), Liao, D. (author), Austin, R.H. (author)

Competing populations in shared spaces with nonrenewable resources do not necessarily wage a battle for dominance at the cost of extinction of the less-fit strain if there are fitness advantages to the presence of the other strain. We report on the use of nanofabricated habitat landscapes to study the population dynamics of competing wild type...

journal article 2008

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InSitu Reduction of Charge Noise in GaAs/AlxGa1-xAs Schottky-Gated Devices

Buizert, C. (author), Koppens, F.H.L. (author), Pioro-Ladriere, M. (author), Tranitz, H.P. (author), Vink, I.T. (author), Tarucha, S. (author), Wegscheider, W. (author), Vandersypen, L.M.K. (author)

We show that an insulated electrostatic gate can be used to strongly suppress ubiquitous background charge noise in Schottky-gated GaAs=AlGaAs devices. Via a 2D self-consistent simulation of the conduction band profile we show that this observation can be explained by reduced leakage of electrons from the Schottky gates into the semiconductor...

journal article 2008

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Single-Molecule Observation of Anomalous Electrohydrodynamic Orientation of Microtubules

Van den Heuvel, M.G.L. (author), Bondesan, R. (author), Lagomarsino, M.C. (author), Dekker, C. (author)

We use fluorescence microscopy to measure the orientation and shape of microtubules—which serve as a model system for semiflexible rods—that are electrophoretically driven. Surprisingly, a bimodal orientation distribution is observed, with microtubules in either parallel or perpendicular orientations to the electric field. The occupancy of these...

journal article 2008

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Conformation and Dynamics of DNA Confined in Slitlike Nanofluidic Channels

Bonthuis, D.J. (author), Meyer, C. (author), Stein, D. (author), Dekker, C. (author)

Using laser fluorescence microscopy, we study the shape and dynamics of individual DNA molecules in slitlike nanochannels confined to a fraction of their bulk radius of gyration. With a confinement size spanning 2 orders of magnitude, we observe a transition from the de Gennes regime to the Odijk regime in the scaling of both the radius of...

journal article 2008

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Triplet Josephson Effect with Magnetic Feedback in a Superconductor-Ferromagnet Heterostructure

Braude, V. (author), Blanter, Y.M. (author)

journal article 2008

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Motor step size and ATP coupling efficiency of the dsDNA translocase EcoR124I

Seidel, R. (author), Bloom, J.G.P. (author), Dekker, C. (author), Szczelkun, M.D. (author)

The Type I restriction-modification enzyme EcoR124I is an archetypical helicase-based dsDNA translocase that moves unidirectionally along the 3'–5' strand of intact duplex DNA. Using a combination of ensemble and single-molecule measurements, we provide estimates of two physicochemical constants that are fundamental to a full description of...

journal article 2008

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Nuclear Tuning and Detuning of the Electron Spin Resonance in a Quantum Dot: Theoretical Consideration

Danon, J. (author), Nazarov, Y.V. (author)

We study nuclear spin dynamics in a quantum dot close to the conditions of electron spin resonance. We show that at a small frequency mismatch, the nuclear field detunes the resonance. Remarkably, at larger frequency mismatch, its effect is opposite: The nuclear system is bistable, and in one of the stable states, the field accurately tunes the...

journal article 2008

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End-joining long nucleic acid polymers

Van den Hout, M. (author), Hage, S. (author), Dekker, C. (author), Dekker, N.H. (author)

Many experiments involving nucleic acids require the hybridization and ligation of multiple DNA or RNA molecules to form a compound molecule. When one of the constituents is single stranded, however, the efficiency of ligation can be very low and requires significant individually tailored optimization. Also, when the molecules involved are very...

journal article 2008

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Modeling and simulation of phase-transitions in multicomponent aluminum alloy casting

Ten Cate, A. (author), Geurts, B.J. (author), Muskulus, M. (author), Köster, D. (author), Muntean, A. (author), Van Opheusden, J. (author), Peschansky, A. (author), Vreman, B. (author), Zegeling, P. (author)

The casting process of aluminum products involves the spatial distribution of alloying elements. It is essential that these elements are uniformly distributed in order to guarantee reliable and consistent products. This requires a good understanding of the main physical mechanisms that affect the solidification, in particular the thermodynamic...

conference paper 2008

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An RNA toolbox for single-molecule force spectroscopy studies

Vilfan, I.D. (author), Kamping, W. (author), Van den Hout, M. (author), Candelli, A. (author), Hage, S. (author), Dekker, N.H. (author)

Precise, controllable single-molecule force spectroscopy studies of RNA and RNA-dependent processes have recently shed new light on the dynamics and pathways of RNA folding and RNAenzyme interactions. A crucial component of this research is the design and assembly of an appropriate RNA construct. Such a construct is typically subject to several...

journal article 2007

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Real-time assembly and disassembly of human RAD51 filaments on individual DNA molecules

Van der Heijden, T. (author), Seidel, R. (author), Modesti, M. (author), Kanaar, R. (author), Wyman, C. (author), Dekker, C. (author)

The human DNA repair protein RAD51 is the crucial component of helical nucleoprotein filaments that drive homologous recombination. The molecular mechanistic details of how this structure facilitates the requisite DNA strand rearrangements are not known but must involve dynamic interactions between RAD51 and DNA. Here, we report the real-time...

journal article 2007

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Stimulated terahertz stokes emission of silicon crystals doped with antimony donors

Pavlov, S.G. (author), Hubers, H.W. (author), Hovenier, J.N. (author), Klaassen, T.O. (author), Carder, D.A. (author), Phillips, P.J. (author), Redlich, B. (author), Riemann, H. (author), Zhukavin, R.Kh. (author), Shastin, V.N. (author)

journal article 2006

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Cl2/O2-inductively coupled plasma etching of deep hole-type photonic crystals in InP

Carlström, C.F. (author), Van Der Heijden, R. (author), Karouta, F. (author), Van Der Heijden, R.W. (author), Salemink, H.W.M. (author), Van der Drift, E. (author)

journal article 2006

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Full counting statistics of noncommuting variables: The case of spin counts

Di Lorenzo, A. (author), Campagnano, G. (author), Nazarov, Y.V. (author)

journal article 2006

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Charge inversion at high ionic strength studied by streaming currents

van der Heyden, F.H.J. (author), Stein, D. (author), Besteman, K. (author), Lemay, S.G. (author), Dekker, C. (author)

journal article 2006

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Using a quantum dot as a high-frequency shot noise detector

Onac, E. (author), Balestro, F. (author), vanBeveren, L.H.W. (author), Hartmann, U. (author), Nazarov, Y.V. (author), Kouwenhoven, L.P. (author)

journal article 2006

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Shot-noise detection in a carbon nanotube quantum dot

Onac, E. (author), Balestro, F. (author), Trauzettel, B. (author), Lodewijk, C.F.J. (author), Kouwenhoven, L.P. (author)

journal article 2006

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Antenna model for wire lasers

Orlova, E.E. (author), Hovenier, J.N. (author), Klaassen, T.O. (author), Kasalynas, I. (author), Adam, A.J.L. (author), Gao, J.R. (author), Klapwijk, T.M. (author), Williams, B.S. (author), Kumar, S. (author), Hu, Q. (author), Reno, J.L. (author)

journal article 2006