cesium atoms bonn
NIST-F1 Cesium Fountain Clock | NIST
NIST-7 has been the primary atomic time standard for the United States since 1993 and is among the best time standards in the world. NIST-F1 is referred to as a fountain clock because it uses a fountain-like …
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What Is An Optical Lattice And Why Does It Make Such Good Clocks?
Cesium atomic clocks are really, really good— the best of them have an uncertainty of around a part in 10 16, which is to say when it measures one second, that's 1.0000000000000000+/-0. ...
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A single trapped atom: Light‐matter interaction at the …
We have identified and photographed individual cesium atoms in a magneto-optical trap with steep magnetic gradients. By switching off the trapping light fields, single …
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A controlled quantum system of individual neutral atoms
This thesis presents novel techniques to realize controllable quantum systems of neutral atoms. Besides the preparation of the exact number of atoms, we manipulate all …
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Angle-Dependent Magic Optical Trap for the 6S1/2↔nP3/2 …
We perform a calculation of the magic conditions of the 6S1/2↔nP3/2 (n = 50–90) Rydberg transition of cesium atoms by introducing an auxiliary electric diople transition connected to the ...
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Andrea ALBERTI | Group leader | PhD
Bonn, Germany; Position. Senior scientist, principal investigator; Publications. ... We have directly observed spin-dependent transport of single cesium atoms in a 1D optical lattice. A ...
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Vladan Vuletic
Sebastian Hofferberth University of Bonn Verified email at iap.uni-bonn.de. ... 3D Raman sideband cooling of atomic cesium to high phase-space density. AJ Kerman, V Vuletić, C Chin, S Chu. ... Laser cooling of atoms, ions, or molecules by coherent scattering. V Vuletić, S Chu. Physical Review Letters 84 (17), 3787, 2000. 390:
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Cold-atom physics using ultrathin optical fibers: light-induced …
The strong evanescent field around ultrathin unclad optical fibers bears a high potential for detecting, trapping, and manipulating cold atoms. Introducing such a fiber into a cold-atom cloud, we investigate the interaction of a small number of cold cesium atoms with the guided fiber mode and with the fiber surface.
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Evidence of exotic trimers sought and found in ultracold gas of cesium
Now, Rudolf Grimm, Cheng Chin, Hanns-Christoph Nägerl of the University of Innsbruck in Austria, and their collaborators have used the Feshbach technique to reveal the presence of Efimov states in an ultracold gas of cesium atoms. 2 Grimm and company didn't make a gas of Efimov trimers. Rather, they saw atoms flee their trap at a value of …
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Physics
Here three colliding atoms at the zero-energy threshold resonantly couple to an Efimov trimer (see arrow for a < 0 in Fig. 1), which opens up a rapid decay path into more deeply bound dimer states. Such a decay resonance was first observed in an ultracold trapped gas of cesium atoms . The resonance is shown in the left-hand panel of Fig. 3.
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Light narrowing of cesium magnetic-resonance lines in a radio …
Figure 2 describes the resonance linewidths of cesium atoms as a function of the pumping rate at four different temperatures, assuming that only spin-destruction collisions, spin-exchange collisions and optical pumping contribute to the spin-relaxation of cesium atoms. The temperatures are T=85°C (magenta), T=80°C (blue), T=75°C (red), …
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A compact high-efficiency cold atom beam source | SpringerLink
In this work, we demonstrate a very simple 2D atom source achieving a 3D MOT loading rate greater than 8 × 10 9 atoms/s with only 20 mW of laser power with a 2D cell size of 6.4 × 1.9 × 1.9 cm 3, and only 48 mW of total 3D trapping power. Our atom beam source is compact in physical size in a self-contained cell without any additional pumping.
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Cesium Experiment Demonstrates Quantum Superposition
In an attempt to make sense of some parts of quantum physics, researchers at the University of Bonn have recently managed to demonstrate superposition in cesium atoms. This principle basically ...
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Single atoms on demand for cavity QED experiments
In Chapter 1 I describe our basic techniques for trapping and observing single cesium atoms. As a source of single atoms we use a high-gradient magneto-optical trap, which captures the atoms from background gas in a vacuum chamber and cools them down to millikelvin temperatures. ... Bonn, 2007. - Dissertation, Rheinische Friedrich-Wilhelms ...
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An atomic physics perspective on the kilogram's new definition
The new kilogram definition can be understood as (a) the mass difference between 1.475 521 4 × 10 40 cesium atoms in the ground state and the same number in the excited hyperfine state or as (b) the mass of 1.475 521 4 × 10 40 photons at the Cs hyperfine frequency trapped in a microwave cavity.
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Cavity QED with single atoms
Quantum communication could be a future application of these controlled interaction between individual photons and atoms. In our experiment we couple single …
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State-selective transport of single neutral atoms
The present work investigates the state-selective transport of single neutral cesium atoms in a one-dimensional optical lattice. It demonstrates experimental applications of this …
ادامه مطلبStandards of Time and Frequency at the Outset of the 21st Century
Furthermore, in NIST-F1, collisions between cesium atoms cause a frequency shift with an uncertainty of δν/ν o ≈ 1.5 × 10 –16. The next generation of cesium fountain clocks are being designed to overcome some of these limitations, with the intention of reducing the total uncertainty in accuracy to the level of δν/ν o ≈ 10 –16.
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An optical conveyor belt for single neutral atoms | SpringerLink
Using optical dipole forces we have realized controlled transport of a single or any desired small number of neutral atoms over a distance of a centimeter with sub-micrometer precision. A standing wave dipole trap is loaded with a prescribed number of cesium atoms from a magneto-optical trap. Mutual detuning of the counter-propagating …
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Caesium
The credit for that goes to Carl Theodor Setterberg at the University of Bonn who obtained it by the electrolysis of molten caesium cyanide, CsCN. Glossary. Atomic radius, non-bonded ... When atoms are energetically excited, for instance when a compound is introduced into a flame, electrons can temporarily be promoted to higher energy levels. ...
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State-selective transport of single neutral atoms
The present work investigates the state-selective transport of single neutral cesium atoms in a one-dimensional optical lattice. It demonstrates experimental applications of this transport, including a single atom interferometer, a quantum walk and controlled two-atom collisions. ... {Rheinische Friedrich-Wilhelms-Universität Bonn}, year ...
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A controlled quantum system of individual neutral atoms
The first part (Chapters 2, 3) reports on a deterministic source of single atoms, which overcomes the limitations imposed by statistical arrival in conventional sources. Single cold cesium atoms prepared in a magneto-optical trap are transferred into a standing wave optical dipole trap, made of two counter-propagating red-detuned Nd:YAG laser ...
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Igor Dotsenko | Cavity Quantum Electrodynamics
2000-2002 : Graduate student, University of Bonn (Group of Prof. D. Meschede), Germany 1996-2000 : Undergraduate student, Physics Department of Kyiv National Taras Shevchenko University, Ukraine ... Application of electro-optically generated light fields for Raman spectroscopy of trapped Cesium atoms, Appl. Phys. B 78, 711 (2004)
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An all-optical, high-sensitivity magnetic gradiometer
Institut für Angewandte Physik, Universität Bonn, Wegelerstraße 8, 53115 Bonn, Germany Received: 3 April 2002 ... (CPT) in a thermal vapor of cesium atoms [10]. Itwassuggestedafewyears ago thataCPT-based magnetometer would be immune to power broadening and. 606 Applied Physics B – Lasers and Optics
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Single Atoms on Demand for Cavity QED Experiments
techniques for trapping and observing single cesium atoms. As a source of single atoms we use a high-gradient magneto-optical trap, which captures the atoms from background …
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Optical control of single neutral atoms
A magneto-optical trap captures and cools down a few cesium atoms. By efficiently detecting their fluorescence, we are able to determine their exact number. ... Alt, Wolfgang: Optical control of single neutral atoms. - Bonn, 2004. - Dissertation, Rheinische Friedrich-Wilhelms-Universität Bonn. Online-Ausgabe in bonndoc: https://nbn-resolving ...
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Quantum marbles in a bowl of light — University of Bonn
Physicists at the University of Bonn and the Technion have now investigated this Mandelstam-Tamm limit for the first time with an experiment on a complex quantum …
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Cesium | Description, Symbol, Uses, & Facts | Britannica
cesium (Cs), also spelled caesium, chemical element of Group 1 (also called Group Ia) of the periodic table, the alkali metal group, and the first element to be discovered spectroscopically (1860), by German scientists Robert Bunsen and Gustav Kirchhoff, who named it for the unique blue lines of its spectrum (Latin caesius, "sky-blue"). This silvery …
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Electric Field Tuned Dipolar Interaction Between Rydberg Atoms
We demonstrated a tuned dipole interaction between Rydberg atoms by employing a controllable electric field in a cold cesium ensemble. The |nP3/2 (n = 38–40) Rydberg pairs are prepared with a three-photon scheme and detected via the state-selective field ionization technique. A weak DC electric field is used to tune the Rydberg pair …
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Single atoms in a MOT | AIP Conference Proceedings
We are experimenting with individual neutral cesium atoms stored in a magneto-optical trap. The atoms are detected by their resonance fluorescence, and …
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