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Search Publications by: Eite Tiesinga (Fed)

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Displaying 26 - 50 of 183

Development of a new UHV/XHV pressure standard (Cold Atom Vacuum Standard)

November 10, 2017
Author(s)
Julia Scherschligt, James A. Fedchak, Daniel Barker, Stephen Eckel, Nikolai Klimov, Constantinos Makrides, Eite Tiesinga
The National Institute of Standards and Technology has recently begun a program to develop a primary pressure standard that is based on ultra-cold atoms, covering a pressure range of 1 × 10-6 Pa to 1 × 10-10 Pa and possibly lower. These pressures

Dispersive optical detection of magnetic Feshbach resonances in ultracold gases

August 18, 2017
Author(s)
Eite Tiesinga, B Sawyer, M Horvath, A Deb, N Kjaergaard
Magnetically tunable Feshbach resonances in ultracold atomic systems are chiefly identified and characterized through time consuming atom loss spectroscopy. We describe an off-resonant dispersive optical probing technique to rapidly locate Feshbach

Investigation of Feshbach Resonances in ultra-cold 40K spin mixtures

April 3, 2017
Author(s)
Eite Tiesinga, J Krauser, J Heinze, S Gotze, M Lanbecker, N Flashner, L Cook, T Hanna, K Sengstock, C Becker
Magnetically-tunable Feshbach resonances are an indispensable tool for experiments with atomic quantum gases. We report on twenty thus far unpublishedi Feshbach resonances and eleven further probable Feshbach resonances in spin mixtures of ultracold

Emergence of chaotic scattering in ultracold Er and Dy

November 19, 2015
Author(s)
T. Maier, H Kadau, M. Schmitt, M. Wenzel, I. Ferrier-Barbut, T. Pfau, A. Frisch, S. Baier, K. Aikawa, L. Chomaz, Mark M.J., F. Ferlaino, Constantinos Makrides, A Petrov, Svetlana A. Kotochigova, Eite Tiesinga
We show that for complex and magnetic atoms chaotic scattering behavior emerges due to anisotropic inter- action potentials and finite Zeeman coupling. This generic behavior is studied in a collaborative effort for both ultracold dysprosium and erbium

Large effective three-body interaction in a double-well optical lattice

August 3, 2015
Author(s)
Eite Tiesinga, Saurabh Paul
We study ultracold atoms in a double-well (DW) optical lattice and show that the low energy states of a multi-band Bose-Hubbard (BH) Hamiltonian with only pai r-wise interactions is equivalent to an effective single-band Hamiltonian with s trong three-body

Optimization of collisional Feshbach cooling of an ultracold non degenerate gas

April 20, 2015
Author(s)
Marlon Nuske, L. Mathey, Eite Tiesinga
We optimize a collision-induced cooling process for ultracold atoms in the nondegenerate regime. It makes use of a Feshbach resonance, instead of rf radiation in evaporative cooling, to selectively expel hot atoms from a trap. Using functional minimization

Spin-orbit-coupled topological Fulde-Ferrell states of fermions in a harmonic trap

November 7, 2014
Author(s)
Lei Jiang, Eite Tiesinga, Xie-Ji Liu, Hui Hu, Han Pu
Motivated by recent experimental breakthroughs in generating spin-orbit coupling in ultracold Fermi gases using Raman laser beams, we present a systematic study of spin-orbit-coupled Fermi gases confined in a quasi-one-dimensional trap in the presence of

Collapse and revivals for systems of short-range phase coherence

October 7, 2014
Author(s)
Khan W. Mahmud, Lei Jiang, Philip R. Johnson, Eite Tiesinga
We predict the existence of novel collapse and revival oscillations that are a distinctive signature of the short-range off-diagonal coherence associated with particle-hole pairs in Mott insulator states. Starting with an atomic Mott state in a one

Bloch oscillations collapse and revival of interacting bosons in an optical lattice

February 10, 2014
Author(s)
Khan W. Mahmud, Lei Jiang, Eite Tiesinga, Philip Johnson
We study the dynamics of interacting superfluid bosons in a one dimensional vertical optical lattice after a sudden increase of the lattice potential depth. We show that this system can be exploited to investigate the effects of strong interactions on

Hyperfine structure of weakly bound levels in the lowest 1g state of molecular 87Rb2

November 13, 2013
Author(s)
Chin-Chun Tsai, T Bergeman, Eite Tiesinga, Paul S. Julienne, D J. Heinzen
Photoassociation resonances in the 87Rb2 1g state dissociating to 52S+52P1/2 were produced by the excitation of colliding 87Rb atoms in a far-off resonance (FORT) trap. Levels down to 31 cm−1 below the dissociation limit were measured with resonance

Spinor Dynamics in an Antiferromagnetic spin-1 Thermal Bose Gas

July 9, 2013
Author(s)
Hyewon K. Pechkis, Jonathan Wrubel, Arne Schwettmann, Paul Griffin, Ryan Barnett, Eite Tiesinga, Paul D. Lett
We present experimental observations of coherent spin-population oscillations in a cold thermal, Bose gas of spin-1 23Na atoms. The population oscillations in a multi-spatial-mode thermal gas have the same behavior as those observed in a single-spatial

Soliton dynamics of an atomic spinor condensate on a Ring Lattice

March 6, 2013
Author(s)
Indubala I. Satija, Carlos L. Pando L., Eite Tiesinga
We study the dynamics of macroscopically-coherent matter waves of an ultra-cold atomic spin-1 or spinor condensate on a ring lattice of six sites and demonstrate a novel type of spatio-temporal internal Josephson effect. Using a discrete solitary mode of

Anisotropy induced Feshbach resonances in a quantum dipolar gas of magnetic atoms.

September 7, 2012
Author(s)
A Petrov, Svetlana A. Kotochigova, Eite Tiesinga
We explore the anisotropic nature of Feshbach resonances in the collision between ultracold magnetic submerged-shell dysprosium atoms, which can only occur due to couplings to rotating bound states. This is in contrast to well-studied alkali-metal atom

Effective multibody interactions of harmonically confined ultracold neutral bosons

March 21, 2012
Author(s)
Philip Johnson, W F. Flynn, D Blume, X Y. Yin, Eite Tiesinga
We use renormalized perturbation theory to calculate effective two-, three-, and four-body interactions for N neutral ultracold bosons in the ground state of an isotropic harmonic trap, assuming only two-body interactions modeled with a zero-range

Resonant control of polar molecules in an optical lattice

February 1, 2012
Author(s)
Thomas M. Hanna, Eite Tiesinga, William F. Mitchell, Paul S. Julienne
We study the resonant control of two nonreactive polar molecules in an optical lattice site, focussing on the example of RbCs. Collisional control can be achieved by tuning bound states of the intermolecular dipolar potential, by varying the applied