Zobrazeno 1 - 10
of 368
pro vyhledávání: '"Drewsen M"'
Publikováno v:
Quantum Sci. Technol. 2 034006 (2017)
We present a method of sensing AC magnetic fields. The method is based on the construction of a robust qubit by the application of continuous driving fields. Specifically, magnetic noise and power fluctuations of the driving fields do not operate wit
Externí odkaz:
http://arxiv.org/abs/1702.07129
Publikováno v:
New J. Phys. 15 (2013) 113019
A general method for rotational microwave spectroscopy and control of polar molecular ions via direct microwave addressing is considered. Our method makes use of spatially varying AC Stark shifts, induced by far off-resonant, focused laser beams to a
Externí odkaz:
http://arxiv.org/abs/1307.4461
Publikováno v:
Phys. Rev. Lett. 111, 230507 (2013)
We present a new robust decoupling scheme suitable for levels with either half integer or integer angular momentum states. Through continuous dynamical decoupling techniques, we create a protected qubit subspace, utilizing a multi-state qubit constru
Externí odkaz:
http://arxiv.org/abs/1307.2933
Autor:
Versolato, O. O., Schwarz, M., Hansen, A. K., Gingell, A. D., Windberger, A., Kłosowski, Ł., Ullrich, J., Jensen, F., López-Urrutia, J. R. Crespo, Drewsen, M.
We present a method to measure the decay rate of the first excited vibrational state of simple polar molecular ions being part of a Coulomb crystal in a cryogenic linear Paul trap. Specifically, we have monitored the decay of the $|\nu$=$1,J$=$1 \ran
Externí odkaz:
http://arxiv.org/abs/1305.4087
Publikováno v:
New J. Phys. 14 093023 (2012)
We examine the time-dependent dynamics of ion crystals in radiofrequency traps. The problem of stable trapping of general three-dimensional crystals is considered and the validity of the pseudopotential approximation is discussed. We derive analytica
Externí odkaz:
http://arxiv.org/abs/1206.4006
Publikováno v:
J. Phys. A: Math. Theor. 45 (2012) 455305
We expand the solutions of linearly coupled Mathieu equations in terms of infinite-continued matrix inversions, and use it to find the modes which diagonalize the dynamical problem. This allows obtaining explicitly the ('Floquet-Lyapunov') transforma
Externí odkaz:
http://arxiv.org/abs/1206.0716
We demonstrate resolved sideband laser cooling of a single 40Ca+ ion in a macroscopic linear radio frequency trap with a radial diagonal electrode spacing of 7 mm and an rf drive frequency of just 3.7 MHz. For an oscillation frequency of 585 kHz alon
Externí odkaz:
http://arxiv.org/abs/1205.1949
Publikováno v:
Phys. Rev. A 85, 023818 (2012)
A detailed description and theoretical analysis of experiments achieving coherent coupling between an ion Coulomb crystal and an optical cavity field are presented. The various methods used to measure the coherent coupling rate between large ion Coul
Externí odkaz:
http://arxiv.org/abs/1108.0528
Publikováno v:
Phys. Rev. Lett. 105, 103001 (2010)
We report on a novel non-invasive method to determine the normal mode frequencies of ion Coulomb crystals in traps based on the resonance enhanced collective coupling between the electronic states of the ions and an optical cavity field at the single
Externí odkaz:
http://arxiv.org/abs/1006.3663
Publikováno v:
Phys. Rev. A, Rapid Comm. 80, 041802 (2009)
We present an investigation of the coherent coupling of various transverse field modes of an optical cavity to ion Coulomb crystals. The obtained experimental results, which include the demonstration of identical collective coupling rates for differe
Externí odkaz:
http://arxiv.org/abs/0909.4139