Results 61 to 70 of about 20,873 (170)

Asymmetric Lineshapes of Efimov Resonances in Mass-Imbalanced Ultracold Gases

Atoms, 2021
The resonant profile of the rate coefficient for three-body recombination into a shallow dimer is investigated for mass-imbalanced systems. In the low-energy limit, three atoms collide with zero-range interactions, in a regime where the scattering ...
Panagiotis Giannakeas, Chris H. Greene
doaj   +1 more source

Adiabatic Formation of Rydberg Crystals with Chirped Laser Pulses

, 2011
Ultracold atomic gases have been used extensively in recent years to realize textbook examples of condensed matter phenomena. Recently, phase transitions to ordered structures have been predicted for gases of highly excited, 'frozen' Rydberg atoms.
Amthor T, Apolinario S W S, E J D Vredenbregt, Gallagher T F, K A H van Leeuwen, Olmos B, Pitaevskii L, R M W van Bijnen, S J J M F Kokkelmans, S Smit, Schachenmayer J, Taban G, Vetterling W T   +12 more
core   +1 more source

Ultracold three-body collisions near narrow Feshbach resonances [PDF]

, 2010
We study ultracold three-body collisions of bosons and fermions when the interatomic interaction is tuned near a narrow Feshbach resonance. We show that the width of the resonance has a substantial impact on the collisional properties of ultracold gases ...
D'Incao, J. P., Esry, B. D., Wang, Yujun
core   +2 more sources

Superradiance in ultracold Rydberg gases [PDF]

Physical Review A, 2007
Experiments in dense, ultracold gases of rubidium Rydberg atoms show a considerable decrease of the radiative excited state lifetimes compared to dilute gases. This accelerated decay is explained by collective and cooperative effects, leading to superradiance.
Wang, Tun, Yelin, S. F., Cote, R., Eyler, E. E., Farooqi, S. M., Gould, P. L., Kostrun, M., Tong, D., Vrinceanu, D.   +8 more
openaire   +2 more sources

Observation of a Halo Trimer in an Ultracold Bose-Fermi Mixture

Physical Review X
The quantum mechanics of three interacting particles gives rise to fundamental and universal phenomena, such as the staircase of Efimov trimers predicted in the context of nuclear physics and observed in ultracold gases.
Alexander Y. Chuang, Huan Q. Bui, Arthur Christianen, Yiming Zhang, Yiqi Ni, Denise Ahmed-Braun, Carsten Robens, Martin Zwierlein   +7 more
doaj   +1 more source

Laser Cooling of Lanthanides: from Optical Clocks to Quantum Simulators

EPJ Web of Conferences, 2015
We discuss current progress in laser cooling of lanthanides (Er, Yb, Dy, Tm etc.) focusing on applications. We describe some important peculiarities taking Thulium atom as an example: Two stage laser cooling, trapping in an optical lattice, anisotropic ...
Golovizin A., Kalganova E., Vishnyakova G., Tregubov D., Khabarova K., Sorokin V., Kolachevsky N.   +6 more
doaj   +1 more source

Negative specific heat with trapped ultracold quantum gases

New Journal of Physics, 2014
The second law of thermodynamics normally prescribes that heat tends to disperse, but in certain cases it instead implies that heat will spontaneously concentrate.
M P Strzys, J R Anglin
doaj   +1 more source

Measuring work and heat in ultracold quantum gases

New Journal of Physics, 2015
We propose a feasible experimental scheme to direct measure heat and work in cold atomic setups. The method is based on a recent proposal which shows that work is a positive operator valued measure (POVM). In the present contribution, we demonstrate that
Gabriele De Chiara, Augusto J Roncaglia, Juan Pablo Paz   +2 more
doaj   +1 more source

Resonances in ultracold dipolar atomic and molecular gases

New Journal of Physics, 2015
A previously developed approach for the numerical treatment of two particles that are confined in a finite optical-lattice potential and interact via an arbitrary isotropic interaction potential has been extended to incorporate an additional anisotropic ...
Bruno Schulz, Simon Sala, Alejandro Saenz   +2 more
doaj   +1 more source