rubidium atoms ultracold
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- rubidium atoms ultracold
In 2002, an experiment with ultracold atoms emulated a textbook condensed-matter physics phenomenon: the phase transition from a superfluid to a Mott insulator. Two decades later, two of the ...
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Rubidium atoms are used in academic research, including the development of quantum-mechanics-based computing devices, a future application with potential for relatively high …
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We report on laser cooling of neutral rubidium atoms by using a single mode of a frequency comb. Cooling is achieved on a dipole-allowed transition at 780 nm in a one-dimensional retro-reflected ...
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Liu et al. 1 analysed ultracold reactions in which KRb molecules (K, potassium; Rb, rubidium) are produced in a single quantum state (the absolute ground state), and collide to produce K 2 and Rb ...
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Rubidium 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 …
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Ultracold atoms are increasingly used for high-precision experiments that can be utilized to extract accurate scattering properties. This results in a stronger need to improve on the accuracy of interatomic potentials, and in particular the usually rather inaccurate inner-range potentials. A boundary condition for this short range can be …
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Working with ultracold rubidium atoms, a team led by Li You at Tsinghua University, China, has succeeded in creating the desired d-wave interactions at low temperatures by using a magnetic field to induce a scattering resonance between the atoms . Unlike electrons, which are fermions, the atoms the team works with are bosons—an …
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Experimental investigation of chemical reactions with full quantum state resolution for all reactants and products has been a long-term challenge. Here we …
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Now, a team around Ramón Ramos at the University of Toronto, Canada, has determined ultracold rubidium atoms' tunnelling time – and it's not instantaneous. This is the first direct measurement of how long such massive particles spend inside a barrier, Ramos says. To do this, the researchers put a half-century-old thought experiment ...
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The physicists used rubidium atoms that had been cooled to temperatures about a millionth of a degree Kelvin above absolute zero as a starting point for their plasma—an extremely cold ...
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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 ab …
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A prerequisite for exploring ultracold chemical reactions is a gaseous molecular sample that is sufficiently dense, ultracold, and suitable for precise control of specific quantum states . The starting point for this work is an ultracold trapped gas of fermionic 40 K 87 Rb molecules prepared in a single hyperfine level of the rovibronic …
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Figure 1: The drop tower at ZARM (left) accomodates an entire laboratory for making ultracold atomic gases in a chip trap (upper right) while freely falling from an altitude of 120 meters. After capsule release, rubidium atoms are captured in a magneto-optical trap (MOT) and then transferred to an Ioffe-Pritchard Trap (IP) where they are cooled to …
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Laser-Cooled Atoms and Molecules Collide in a Trap. An experiment shows the circumstances under which ultracold atoms are quick to kick molecules out of a trap, providing clues for how to use atoms as a refrigerant for molecules. Laser cooling can chill molecules to just a few microkelvin, but some experiments demand even colder …
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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
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efficient even at ultracold temperatures. Indeed, this model for barrierless reactions predicts loss rates that are universal in the sense that they do not depend on the details of the short-range inter-actions, but instead can be estimated using only knowledge of the long-range interactions (12). Like the case of collisions of ultracold atoms,
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@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 …
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Here we prepare an ultracold few-body quantum state of reactants and demonstrate state-to-state chemistry for the recombination of three spin-polarized ultracold rubidium (Rb) atoms to form a weakly bound Rb 2 molecule. The measured product distribution covers about 90% of the final products, and we are able to discriminate …
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Rubidium atoms are used in academic research, including the development of quantum-mechanics-based computing devices, a future application with potential for relatively high consumption of rubidium. Quantum computing research uses ultracold rubidium atoms in a variety of applications. Quantum computers, which have the ability to perform more ...
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To realize the double-well potentials for ultracold rubidium atoms, we superimpose two periodic potentials with a periodicity of 382.5 nm (short lattice) and 765.0 nm (long lattice) and ...
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Compared with atoms, ... Ospelkaus, S. et al. Quantum-state controlled chemical reactions of ultracold potassium–rubidium molecules. Science 327, 853–857 (2010).
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Nature Physics - Magnetically tunable scattering resonances between strontium and rubidium atoms are observed in an ultracold experiment, opening the …
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Using about 100 ultracold rubidium atoms, they could make entangled pairs with a fidelity of over 95 per cent and more than two-second lifetime. Then, they connected the entangled pairs into one ...
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Ripka et al. used a cloud of warm excited rubidium atoms confined to a gas cell and exploited the exaggerated interaction of Rydberg states to generate single photons on demand. The results demonstrate the viability of atomic gases for application in the development of quantum technologies. Science, this issue p. 446.
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Abstract. It has long been predicted that the scattering of ultracold atoms can be altered significantly through a so-called 'Feshbach resonance'. Two such resonances have now been observed in ...
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We experimentally investigate various processes present in the photoassociative interaction of an ultracold atomic sample with shaped femtosecond laser pulses as an detailed extension of previous work [W. Salzmann et al., Phys. Rev. Lett. 100, 233003 (2008)]. We demonstrate the photoassociation of pairs of rubidium atoms into …
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Towards photoassociation processes of ultracold rubidium trimers. Jan Schnabel, Tobias Kampschulte, Simon Rupp, Johannes Hecker Denschlag, and Andreas …
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Ultracold atoms can be visualized by various techniques. ... The total ionization cross-section for rubidium at 6 keV electron energy is ...
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Fig. 1. (a) Schematic illustration of a compact system to generate optical trap arrays for cold atoms using a metasurface hologram. The metasurface modulates the incident laser beam without the assistance of any other optical components and forms an optical trap array in the vacuum chamber. A 3 × 3 square lattice array is illustrated but the ...
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Rubidium atoms in the | F = 1, m F = − 1 〉 low-field seeking state are trapped at estimated distances down to about 100 nm from the chip surface and with calculated mean trapping frequencies up to about 800 kHz. The measured lifetimes of the atoms trapped in the magnetic lattice are in the range 0.4– 1.7 ms, depending on …
به خواندن ادامه دهیدHere 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 ...
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Two more rocket launches, MAIUS-2 and MAIUS-3, are planned for 2022 and 2023, and on these missions the team also intends to use potassium atoms, in addition to rubidium atoms, to produce ...
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This demonstration has now become possible with an ultracold cloud of rubidium atoms. Usually, a Bose-Einstein condensate is prepared through so-called evaporative cooling. This works much like ...
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cally 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 condensate by tuning a bias magnetic field. For the case of 85Rb they occur at field values in the range where these atoms
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In their experiments, the researchers loaded a BEC of ultracold rubidium atoms into a trap with a straight, narrow, U-shaped potential in the vertical direction. …
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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.
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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 ...
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Specifics vary, but ultracold atoms can be more than 200,000 times slower than room-temperature atoms. This opens up new ways to study atoms as well as new ways to use them for investigations …
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Experiments with ultracold molecular gases offer a powerful lens on quantum chemistry, but in the decade since such systems were first developed, researchers have been puzzled by unexpected losses of molecules from traps. It's now understood that during chemical reactions between molecules and atoms, temporary intermediate …
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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.
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