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Mar 12, 2021Rubidium Lab. Ultracold atomic systems can be used as quantum simulators to study a range of phenomena in strongly-correlated materials ranging from high-Tc superconductors to quantum magnets. The micron-scale spacing of atoms in these systems provides an opportunity to optically image fluctuations and correlations in strongly correlated
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Sep 10, 2021And the Cold Atom Lab onboard the International Space Station has conducted experiments at the researchers started with a cloud of 100,000 rubidium atoms
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Jul 21, 1995They restricted the movement of rubidium atoms using laser beams and a magnetic field, and then allowed the warmest ones to escape. This lowered
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excitation, laser-cooled rubidium atoms confined in a volume of order 1mm3 are first excited from the ground state 5S1/2 to the 5P3/2 state using a 780nm diode laser pulse of a few s duration. A short UV laser pulse (λUV = 355nm, duration 10ns, pulse energy up to 10mJ) fired during the diode laser pulse partially ionizes the 5P3/2-atoms,
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Dynamics of cold rubidium atoms in a magneto-optical trap
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Jul 03, 2019Rubidium can be used to give fireworks a red-violet color. Rubidium is the 23 rd most abundant element in the Earth's crust. Rubidium chloride is used in biochemistry as a biomarker to track where potassium is taken up by living organisms. The hyper-fine electron structure of Rubidium-87 is used in some atomic clocks to maintain accuracy.
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As noted in ref. 20, the Doppler contribution in rubidium is much smaller than in sodium. This implies that precision comparable to that of ref. 20 can be achieved with cold atoms without the need for the same degree of velocity selection. Our results suggest that a precision measurement is possible
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a starting platform for a variety of further experiments with cold atoms. In this article, we describe the magneto-optical trap, built in our laboratory for the studies of collective and non-linear effects in dense and cold clouds of rubidium atoms. As a MOT has already
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UC Berkeley Ultracold Atomic Physics. PROSPECTIVE STUDENTS: Check out our Research pages for virtual lab tours and more! Our research focuses on using ultracold atoms, ultracold molecules, and light, to construct novel quantum mechanical systems, and then to use these systems to study fundamental quantum science, with applications towards
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An employee will be involved in development of a Noisy Intermediate-Scale Quantum computer based on an array of single trapped cold Rubidium atoms. The resultant set-up is assumed to have several dozens of quantum gates and ability to perform the state of the art quantum algorithms computations.
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laser intensity are investigated. There are about 1.5xlO7 ultracold rubidium atoms in the MOT. At 7 Watts FORT laser power, about 8% of the atoms are loaded successfully into the cw FORT and about 5% into the pulsed FORT under similar, but not identical, conditions. In most respects both the cw and pulsed FORTs show
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Oct 14, 2020Using ultra-cold rubidium-87 atoms as light storage, researchers were able to transport light for 1.2 millimeters. This light storage could provide an extended lifetime and a high level of storing
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Coherent Backscattering of Light From an Ultra Cold Gas of Rubidium-85 Atoms (2003). Doctor of Philosophy (PhD), dissertation, Physics, Old Dominion University, DOI: 10.25777/nvhm-m443
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Jul 10, 2021The cold atom technology used has some similarities to ColdQuanta's 100 qubit Hilbert machine that we recently reported on. While ColdQuanta uses cesium atoms in its implementation instead of rubidium, both use lasers to cool the atoms and then laser light to create optical tweezers that arrange the atoms in the desired location.
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The dynamics of the excited state during the photoassociation of cold molecules from cold rubidium atoms is studied in a series of pump-probe experiments. Dipole transitions similar to those of the atoms are observed in the molecular signal. While such behaviour is characteristic of the long-range molecules, the photoassociation of bound
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ondly, the lower collision rates in the cold atomic sample reduce the decoherence rate. Early experimentalstudies of EIT in the cold atoms were mainly carried out in rubidium atoms [8–10]. Subsequently, the EIT based nonlinear optical phe-nomena were studied [4,11], which led to the recent experiments on the resonant nonlinear optics at low
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laser intensity are investigated. There are about 1.5xlO7 ultracold rubidium atoms in the MOT. At 7 Watts FORT laser power, about 8% of the atoms are loaded successfully into the cw FORT and about 5% into the pulsed FORT under similar, but not identical, conditions. In most respects both the cw and pulsed FORTs show
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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. A lot of effort was devoted to the stabilization of the laser sources for two-photon excitation to the Rydberg states, using techniques based on modulation transfer spectroscopy
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Apr 18, 2017They cooled rubidium atoms to near absolute zero (minus 459.67 degrees Fahrenheit, or minus 273.15 degrees Celsius) while the atoms were squished inside a tiny horizontal tube. At
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We experimentally investigate the radiative force and laser-induced fluorescence (LIF) in cold rubidium atoms induced by pulse-train (frequency-comb) excitation. Three configurations are studied: (i) single-pulse-train excitation, (ii) two in-phase counterpropagating pulse trains, and (iii) two out-of-phase counterpropagating pulse trains. In all configurations, measured LIF is in agreement
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Oct 31, 2005However, initial attempts to achieve such interactions have been hindered by inadequate control and manipulation of the cold atom source. Here, we present work on designing and building an ultra‐stable source of magneto‐optically cooled rubidium atoms
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Nov 23, 2017The team used a new process of laser cooling to cool a cloud of rubidium atoms all the way from room temperature to 1 microkelvin, or less than one-millionth of a degree above absolute zero. With this technique, the team was able to cool 2,000 atoms, and from that, generate a condensate of 1,400 atoms, conserving 70 percent of the original cloud.
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EIT Four-Level Lambda Scheme of Cold Rubidium Atoms. Brzostowski Bartosz 1, Cao Long V. 1, Khoa Dinh Xuan 2, Grabiec Bogdan 1, Ngoc Sau Vu 2, Żaba Agnieszka 1. 1 Quantum Optics and Engineering Division, Institute of Physics, University of Zielona Gra, ul. Prof. Szafrana 4a, 65-516 Zielona Gra, Poland
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The effect of microwave radiation on the resonance fluorescence of a cloud of cold $^{85}Rb$ atoms in a magnetooptical trap is studied. The radiation frequency
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Nov 27, 2020The Stanford team's solution was to separate their atom chip from the samples they wanted to study. While the ultracold rubidium atoms in the SQCRAMscope remain inside a vacuum chamber, the chip used to magnetically trap them is located just outside it, with a few-hundred micrometre gap in between for the samples to slide in.
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A series of experiments is performed on cold 85Rb atoms confined in a magneto-optical trap. A variation of Stimulated Raman adiabatic passage (STIRAP) is used to transfer population from the 5S 1/2 ground state to the 5D5/2 state with an efficiency exceeding 80%. This process relies on moderately intense pulses arriving in the counterintuitive order, i.e., the upper transition (5P → 5D
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Mar 12, 2021Rubidium Lab. Ultracold atomic systems can be used as quantum simulators to study a range of phenomena in strongly-correlated materials ranging from high-Tc superconductors to quantum magnets. The micron-scale spacing of atoms in these systems provides an opportunity to optically image fluctuations and correlations in strongly correlated
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when fusion actually happens. According to nuclear theory, deuterium atoms fuse and release energy in a two-step process: 1) The two deuterium atoms unite to form a single atom of helium-4 (helium with two protons and two neutrons). 2) This helium-4 atom has a lot of energy—so much energy that it is unstable.
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Apr 11, 2009Hallmarks of an exotic, predicted state of matter called a supersolid have been spotted in a gas of ultracold rubidium atoms. In the same matter, researchers found signs of the seemingly disparate properties of both solidity and superfluidity, the frictionless flow of atoms.
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According to our analysis, these interesting phenomena should be observable in realistic experiments by using alkalimetal atoms (e.g., cold Rb atoms) where the atomic temperature can be decreased to several tens of $mu$ K so that the Doppler broadening effect can be effectively eliminated. If the atoms are thermal, however, it is certain that
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