We report on precise measurements of absolute nonlinear ionization probabilities obtained by exposing optically trapped ultracold rubidium atoms to the field of an ultrashort laser pulse in the intensity range of to …
The ultracold bubbles could eventually be used in new kinds of experiments with an even more exotic material: a fifth state of matter (distinct from gases, liquids, solids, and plasmas) called a Bose-Einstein condensate (BEC). In a BEC, scientists can observe the quantum properties of atoms at a scale visible to the naked eye.
In addition to ultracold rubidium atoms, MAIUS 2 was the first time a sounding rocket flew ultracold potassium atoms. However, the use of two different types of atoms presented a major technological challenge for the team. Generating BECs with two different types of atoms requires twice the number of lasers and therefore more …
The 85 Rb atoms for forming 85 Rb 2 were trapped from the background thermal atoms, and cooled by a MOT in a stainless vacuum chamber with a vapor pressure of ∼10 −9 Torr using a rubidium dispenser as an atomic source. The shape of the atomic cloud loaded in the MOT was approximately spherical with a 1.4 mm diameter and ∼10 7 …
The commonly used techniques for the study of ultracold atoms is by deploying magneto-optical traps with high-power laser cooling techniques. ... potassium, rubidium are commonly studied ...
In 2017, he was part of a team sponsored by the German Space Agency, or DLR, which achieved atom interferometry using ultracold rubidium atoms – but not potassium atoms – aboard a research ...
We report on such precise measurements for rubidium in the intensity range of 1 × 10 11 – 4 × 10 13 W cm −2. The experimental data are in perfect agreement with …
@article{osti_23004817, title = {Creation of the first Russian time and frequency standard on a fountain of ultracold rubidium atoms}, author = {Pavlenko, K. Yu. and Pavlenko, Yu. K. and Belyaev, A. A. and Blinov, I. Yu. and Khromov, M. N. and Bize, S. and Lorini, L., E-mail: pavlenko.k@vremya-ch}, abstractNote = {Technical specific …
Understanding strong-field ionization requires a quantitative comparison between experimental data and theoretical models which is notoriously difficult to achieve. Optically trapped ultracold atoms allow to extract absolute nonlinear ionization probabilities by imaging the atomic density after exposure to the field of an ultrashort laser pulse. We …
A 3D MOT of ultracold atoms is created in a UHV chamber. Laser beams used to slow hot thermal atoms are shown in blue, 3D MOT beams in green and magnetic field coils in brown.
On the basis of recently measured ${mat{Rb}}_{2}$ bound-state energies and continuum properties, we predict magnetically induced Feshbach resonances in collisions of ultracold rubidium atoms. The resonances make it possible to control the sign and magnitude of the effective particle-particle interaction in a Rb Bose-Einstein …
Rubidium atoms used to record coldest temperature — ever. Atomic gas cooled to 0.00000000005 degrees Celsius above absolute …
2 Citations. 219 Altmetric. Metrics. Abstract. The capability to reach ultracold atomic temperatures in compact instruments has recently been extended into …
experiment run with Rubidium-85 atoms. 2 Theory 2.1 Feshbach Resonance Currently, molecules cannot be cooled directly to ultracold temperatures. However, it is possible to instead assemble ultracold atoms into ultracold molecules. Several techniques have been implemented to do this, but one very successful method is through use of a
At the end of optical evaporative cooling, we create an ultracold mixture containing about 3.0 × 10 5 23 Na atoms and 2.3 × 10 5 40 K atoms at a temperature of about 250 nK.
Manipulation and control of ultra-cold rubidium atoms. A. Kowalczyk. Published 2013. Physics. During the course of this PhD an experimental set-up has been designed and implemented to confine neutral atoms in microscopic dipole traps and to manipulate their internal states by laser excitation to Rydberg states.
Weather in a carousel. In their new study, the physicists used lasers to trap a cloud of about 1 million sodium atoms, and cooled the atoms to temperatures of about …
We can use the atoms as ultra-high accurate sensors to probe forces with the power of quantum mechanics. We can study how quantum particles combine together under the action of strong interactions and how superfluidity develops. We can use these ultracold atoms to process information and develop new quantum technologies.
Abstract We present experiments on two-photon excitation of 87Rb atoms to Rydberg states. For this purpose, two continuous-wave (cw)-laser systems for both 780 nm and 480 nm have been set up. ... High resolution Rydberg spectroscopy of ultracold rubidium atoms. A. Grabowski, A. Grabowski. 5. Physikalisches Institut,Universität …
Abstract. We report on the creation, observation and optimization of superposition states of cold atoms. In our experiments, rubidium atoms are prepared in a magneto-optical trap and later, after ...
Gray Molasses on Rubidium-87 atoms Elia Sol´e Cardona` sition to a bright state. The probability of this transfer increases with atomic velocity, leading to the accumula-tion of slow atoms in the dark state, where photon scat-tering is suppressed. On the other hand, fast atoms are transferred to a bright state and undergo the cooling cy-cle.
Now, demonstrating this new application, Lev and his colleagues confined 100,000 ultracold rubidium atoms inside a multimode cavity that consists of two curved …
Ultracold atoms should lead to increasingly sensitive interferometers, devices that can measure gravity and test the limits of quantum theory. Kasevich hopes to improve the technique and cool ...
Nature Reviews Physics (2020) Ultracold alkaline-earth atoms are used in precision measurements and quantum simulation. Because of their unique atomic structure, they could enable the study of ...
The LIAD effect. Atoms trapped in a Rb MOT during a violet light pulse (delimited by the dotted lines). LIAD increases the partial rubidium pressure, leading to a MOT of ~10 8 atoms.
In their experiment, they cause a gas of rubidium-87 to form an ultracold state of matter known as a Bose-Einstein condensate. Then, laser light from two opposite directions bathes or "dresses" the rubidium atoms in the gas. The laser light interacts with the atoms, shifting their energy levels in a peculiar momentum-dependent manner.
Here we report the preparation of a Tonks–Girardeau gas of ultracold rubidium atoms held in a two-dimensional optical lattice formed by two orthogonal standing waves. The addition of a third ...
The formation of an ultracold plasma can be triggered by ionizing a tunable number of atoms in a micrometer-sized volume of a 87 Rb Bose-Einstein condensate (BEC) by a single femtosecond laser ...
Optically trapped ultracold atoms allow to extract absolute nonlinear ionization probabilities by imaging the atomic density after exposure to the field of an ultrashort laser pulse. We report on ...
The scientists used laser light to cool rubidium atoms to ultracold temperatures of 100 nanokelvins, only slightly above absolute zero temperature of -273.15° Celsius.
A system of ultracold rubidium atoms confined by two misaligned laser-beam arrays has been used to simulate remarkable structures called twisted-bilayer materials. The atomic technology
