Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Vink, A. T."'
Autor:
Danon, J., Vink, I. T., Koppens, F. H. L., Nowack, K. C., Vandersypen, L. M. K., Nazarov, Yu. V.
Publikováno v:
Phys. Rev. Lett. 103, 046601 (2009)
We observe multiple stable states of nuclear polarization in a double quantum dot under conditions of electron spin resonance. The stable states can be understood within an elaborated theoretical rate equation model for the polarization in each of th
Externí odkaz:
http://arxiv.org/abs/0902.2653
Autor:
Vink, I. T., Nowack, K. C., Koppens, F. H. L., Danon, J., Nazarov, Yu. V., Vandersypen, L. M. K.
Publikováno v:
Nature Physics 5, 764 (2009)
The main obstacle to coherent control of two-level quantum systems is their coupling to an uncontrolled environment. For electron spins in III-V quantum dots, the random environment is mostly given by the nuclear spins in the quantum dot host materia
Externí odkaz:
http://arxiv.org/abs/0902.2659
Autor:
Buizert, Christo, Koppens, Frank H. L., Pioro-Ladriere, Michel, Tranitz, Hans-Peter, Vink, Ivo T., Tarucha, Seigo, Wegscheider, Werner, Vandersypen, Lieven M. K.
Publikováno v:
Phys. Rev. Lett. 101, 226603 (2008)
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 2-D self-consistent simulation of the conduction band profile we show that this observation
Externí odkaz:
http://arxiv.org/abs/0808.0465
Publikováno v:
Appl. Phys. Lett. 91, 123512 (2007)
We employ a cryogenic High Electron Mobility Transistor (HEMT) amplifier to increase the bandwidth of a charge detection setup with a quantum point contact (QPC) charge sensor. The HEMT is operating at 1K and the circuit has a bandwidth of 1 MHz. The
Externí odkaz:
http://arxiv.org/abs/0708.0461
Autor:
Koppens, F. H. L., Buizert, C., Vink, I. T., Nowack, K. C., Meunier, T., Kouwenhoven, L. P., Vandersypen, L. M. K.
Spin-dependent transport measurements through a double quantum dot are a valuable tool for detecting both the coherent evolution of the spin state of a single electron as well as the hybridization of two-electron spin states. In this paper, we discus
Externí odkaz:
http://arxiv.org/abs/0704.1628
Autor:
Meunier, T., Tielrooij, K-J., Vink, I. T., Koppens, F. H. L., Tranitz, H. P., Wegscheider, W., Kouwenhoven, L. P., Vandersypen, L. M. K.
Publikováno v:
physica status solidi (b), Vol. 243/15/2006, page 3855-3858
We demonstrate experimentally a read-out method that distinguishes between two-electron spin states in a quantum dot. This scheme combines the advantages of the two existing mechanisms for spin-to-charge conversion with single-shot charge detection:
Externí odkaz:
http://arxiv.org/abs/cond-mat/0612178
Autor:
Meunier, T., Vink, I. T., van Beveren, L. H. Willems, Tielrooij, K-J., Hanson, R., Koppens, F. H. L., Tranitz, H. P., Wegscheider, W., Kouwenhoven, L. P., Vandersypen, L. M. K.
Publikováno v:
Phys. Rev. Lett 98, 126601 (2007)
We observe an experimental signature of the role of the phonons in spin relaxation between triplet and singlet states in a two-electron quantum dot. Using both the external magnetic field and the electrostatic confinement potential, we change the sin
Externí odkaz:
http://arxiv.org/abs/cond-mat/0609726
Autor:
Koppens, F. H. L., Buizert, C., Tielrooij, K. J., Vink, I. T., Nowack, K. C., Meunier, T., Kouwenhoven, L. P., Vandersypen, L. M. K.
Publikováno v:
Nature 442, 766-771 (2006)
The ability to control the quantum state of a single electron spin in a quantum dot is at the heart of recent developments towards a scalable spin-based quantum computer. In combination with the recently demonstrated exchange gate between two neighbo
Externí odkaz:
http://arxiv.org/abs/cond-mat/0608459
Autor:
Meunier, T., Vink, I. T., van Beveren, L. H. Willems, Koppens, F. H. L., Tranitz, H. P., Wegscheider, W., Kouwenhoven, L. P., Vandersypen, L. M. K.
Publikováno v:
Phys. Rev. B 74, 195303 (2006)
We propose and implement a non-destructive measurement that distinguishes between two-electron spin states in a quantum dot. In contrast to earlier experiments with quantum dots, the spins are left behind in the state corresponding to the measurement
Externí odkaz:
http://arxiv.org/abs/cond-mat/0603794
Autor:
Koppens, F. H. L., Folk, J. A., Elzerman, J. M., Hanson, R., van Beveren, L. H. Willems, Vink, I. T., Tranitz, H. P., Wegscheider, W., Kouwenhoven, L. P., Vandersypen, L. M. K.
Publikováno v:
Science vol 309 p.1346 (2005)
We observe mixing between two-electron singlet and triplet states in a double quantum dot, caused by interactions with nuclear spins in the host semiconductor. This mixing is suppressed by applying a small magnetic field, or by increasing the interdo
Externí odkaz:
http://arxiv.org/abs/cond-mat/0509053