Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Schmiegelow, Christian Tomás"'
Autor:
Barreto, Nicolás Adrián Nuñez, Bonetto, Muriel, Luda, Marcelo Alejandro, Cormick, Cecilia, Schmiegelow, Christian Tomás
We present an experiment investigating the rotational Doppler effect using a single trapped ion excited by two copropagating vortex laser beams. The setup isolates the azimuthal gradients of the fields, eliminating longitudinal and curvature effects.
Externí odkaz:
http://arxiv.org/abs/2407.05080
Autor:
Barreto, Nicolás Adrián Nuñez, Bonetto, Muriel, Luda, Marcelo Alejandro, Cormick, Cecilia, Schmiegelow, Christian Tomás
We study the influence of micromotion on the spectrum of trapped ions with a lambda-type level scheme, leading to dark resonances due to coherent population trapping. We work with calcium ions trapped in a ring-shaped Paul trap, in which one can comp
Externí odkaz:
http://arxiv.org/abs/2402.01594
We present experimental results and a theoretical model that illustrate how competing eigenbases can determine the dynamics of a fluorescing atom. In the absence of a magnetic field, the atom can get trapped in a dark state, which inhibits fluorescen
Externí odkaz:
http://arxiv.org/abs/2310.18525
Publikováno v:
J. Opt. Soc. Am. B 40, C35-C39 (2023)
We present a design concept for a speckle based wavemeter that combines high spectral resolution and fast response times. Our device uses a fixed disperse medium with small coherence length as an optical pre-processor and a series of programmable opt
Externí odkaz:
http://arxiv.org/abs/2303.00679
Autor:
Barreto, Nicolás Nuñez, Giardino, Lucas, Crucianelli, Carla, Bonetto, Muriel, Drechsler, Martin, Schmiegelow, Christian Tomás
In this paper we present a method to measure transient fluorescent dynamics with single trapped ions in a Paul trap. We use $^{40}$Ca$^+$ ions which exhibit a $\Lambda$-type three-level system and measure the characteristic optical pumping times betw
Externí odkaz:
http://arxiv.org/abs/2303.00650
Publikováno v:
Phys. Rev. A (2022) 106, 053708
We present theoretical and experimental results of coherent population trapping spectra on a multi-level $^{40}$Ca$^+$-type configuration, adding a third beam to the standard two-laser $\Lambda$ system to avoid undesired optical pumping. We show that
Externí odkaz:
http://arxiv.org/abs/2206.12305
Autor:
Drechsler, Martín, Freitas, María Belén Farías Nahuel, Schmiegelow, Christian Tomás, Paz, Juan Pablo
Publikováno v:
Phys. Rev. A 101, 052331 (2020)
We show that the motion of a cold trapped ion can be squeezed by modulating the intensity of a phase-stable optical lattice placed inside the trap. As this method is reversible and state selective it effectively implements a controlled-squeeze gate.
Externí odkaz:
http://arxiv.org/abs/1911.05810
Publikováno v:
Review of Scientific Instruments 90, 023106 (2019)
We present a multi-purpose toolkit for digital processing, acquisition and feedback control designed for physics labs. The kit provides in a compact device the functionalities of several instruments: function generator, oscilloscope, lock-in amplifie
Externí odkaz:
http://arxiv.org/abs/1811.01901
Autor:
Schmiegelow, Christian Tomas, Kaufmann, Henning, Ruster, Thomas, Schulz, Jonas, Kaushal, Vidyut, Hettrich, Max, Schmidt-Kaler, Ferdinand, Poschinger, Ulrich G.
Publikováno v:
Phys. Rev. Lett. 116, 033002 (2016)
We demonstrate control of the absolute phase of an optical lattice with respect to a single trapped ion. The lattice is generated by off-resonant free-space laser beams, we actively stabilize its phase by measuring its ac-Stark shift on a trapped ion
Externí odkaz:
http://arxiv.org/abs/1507.05207
Autor:
Luda, Marcelo Alejandro, Larotonda, Miguel Antonio, Paz, Juan Pablo, Schmiegelow, Christian Tomás
Publikováno v:
Phys. Rev. A 89, 042325 (2014)
Several schemes have been proposed to extend Quantum Key Distribution protocols aiming at improving their security or at providing new physical substrates for qubit implementation. We present a toolbox to jointly create, manipulate and measure qubits
Externí odkaz:
http://arxiv.org/abs/1312.4365