Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Elzerman, J. M."'
In semiconductors, the T2* coherence time of a single confined spin is limited either by the fluctuating magnetic environment (via the hyperfine interaction), or by charge fluctuations (via the spin-orbit interaction). We demonstrate that both limita
Externí odkaz:
http://arxiv.org/abs/1112.4710
A holy grail of photonics research is the realization of a laser that uses a single quantum emitter as the gain medium. Such a device would exhibit a plethora of new features, including lasing without a well-defined threshold and output intensity flu
Externí odkaz:
http://arxiv.org/abs/1011.5203
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
Autor:
Hanson, R., van Beveren, L. H. Willems, Vink, I. T., Elzerman, J. M., Naber, W. J. M., Koppens, F. H. L., Kouwenhoven, L. P., Vandersypen, L. M. K.
Publikováno v:
Phys. Rev. Lett. 94, 196802 (2005)
We present a method for reading out the spin state of electrons in a quantum dot that is robust against charge noise and can be used even when the electron temperature exceeds the energy splitting between the states. The spin states are first correla
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412768
Autor:
Elzerman, J. M., Hanson, R., van Beveren, L. H. Willems, Witkamp, B., Vandersypen, L. M. K., Kouwenhoven, L. P.
Publikováno v:
extended version of Nature 430, 431-435 (2004)
Spin is a fundamental property of all elementary particles. Classically it can be viewed as a tiny magnetic moment, but a measurement of an electron spin along the direction of an external magnetic field can have only two outcomes: parallel or anti-p
Externí odkaz:
http://arxiv.org/abs/cond-mat/0411232
Autor:
Hanson, R., Vink, I. T., DiVincenzo, D. P., Vandersypen, L. M. K., Elzerman, J. M., van Beveren, L. H. Willems, Kouwenhoven, L. P.
We demonstrate how rate equations can be employed to find analytical expressions for the sequential tunneling current through a quantum dot as a function of the tunnel rates, for an arbitrary number of states involved. We apply this method at the one
Externí odkaz:
http://arxiv.org/abs/cond-mat/0407793
Autor:
Vandersypen, L. M. K., Elzerman, J. M., Schouten, R. N., van Beveren, L. H. Willems, Hanson, R., Kouwenhoven, L. P.
We observe individual tunnel events of a single electron between a quantum dot and a reservoir, using a nearby quantum point contact (QPC) as a charge meter. The QPC is capacitively coupled to the dot, and the QPC conductance changes by about 1% if t
Externí odkaz:
http://arxiv.org/abs/cond-mat/0407121
Autor:
Elzerman, J. M., Hanson, R., van Beveren, L. H. Willems, Vandersypen, L. M. K., Kouwenhoven, L. P.
Publikováno v:
Applied Physics Letters 84, 4617-4619 (2004)
We demonstrate a novel method for measuring the discrete energy spectrum of a quantum dot connected very weakly to a single lead. A train of voltage pulses applied to a metal gate induces tunneling of electrons between the quantum dot and a reservoir
Externí odkaz:
http://arxiv.org/abs/cond-mat/0312222
Autor:
Hanson, R., Vandersypen, L. M. K., van Beveren, L. H. Willems, Elzerman, J. M., Vink, I. T., Kouwenhoven, L. P.
Publikováno v:
Phys. Rev. B 70, 241304 (2004)
We study the spin states of a few-electron quantum dot defined in a two-dimensional electron gas, by applying a large in-plane magnetic field. We observe the Zeeman splitting of the two-electron spin triplet states. Also, the one-electron Zeeman spli
Externí odkaz:
http://arxiv.org/abs/cond-mat/0311414
Autor:
Engel, Hans-Andreas, Golovach, Vitaly, Loss, Daniel, Vandersypen, L. M. K., Elzerman, J. M., Hanson, R., Kouwenhoven, L. P.
Publikováno v:
Phys. Rev. Lett. 93, 106804 (2004)
We consider electron spin qubits in quantum dots and define a measurement efficiency e to characterize reliable measurements via n-shot read outs. We propose various implementations based on a double dot and quantum point contact (QPC) and show that
Externí odkaz:
http://arxiv.org/abs/cond-mat/0309023