Versatile electric fields for the manipulation of ultracold NaK molecules

Gempel, Matthias W.; Hartmann, Torsten; Schulze, Torben; Voges, Kai K.; Zenesini, Alessandro; Ospelkaus, Silke

doi:10.1088/1367-2630/18/4/045017

Cited by 16 publications

(22 citation statements)

References 33 publications

(39 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To this end, we study the relation between the momentum scaling parameters in the framework of the hydrodynamic theory and evaluate the respective energy contributions Eqs. (16)- (19) in local equilibrium in (31), where again the collision integral vanishes by definition. With this we obtain…”

Section: Equilibriummentioning

confidence: 99%

“…We have considered ǫ dd = 1.33, which can either be achieved by changing trap and atom number parameters or by tuning the interaction strength [19]. Indeed, one oscillation takes place in T = 2π/ReΩ seconds.…”

Section: Experimental Prospectsmentioning

confidence: 99%

“…(18) and (19) with the equilibrium distribution (14). This leads to explicit expressions which only depend on the Thomas-Fermi radii and momenta R ı and K ı , see also Refs.…”

Section: Appendix A: Computation Of the Energy Integralsmentioning

confidence: 99%

See 2 more Smart Citations

Low-lying excitation modes of trapped dipolar Fermi gases: From the collisionless to the hydrodynamic regime

2017

View full text Add to dashboard Cite

By means of the Boltzmann-Vlasov kinetic equation we investigate dynamical properties of a trapped, one-component Fermi gas at zero temperature, featuring the anisotropic and long-range dipole-dipole interaction. To this end, we determine an approximate solution by rescaling both space and momentum variables of the equilibrium distribution, thereby obtaining coupled ordinary differential equations for the corresponding scaling parameters. Based on previous results on how the Fermi sphere is deformed in the hydrodynamic regime of a dipolar Fermi gas, we are able to implement the relaxation-time approximation for the collision integral. Then, we proceed by linearizing the equations of motion around the equilibrium in order to study both the frequencies and the damping of the low-lying excitation modes all the way from the collisionless to the hydrodynamic regime. Our theoretical results are expected to be relevant for understanding current experiments with trapped dipolar Fermi gases.

show abstract

Section: Equilibriummentioning

confidence: 99%

Section: Experimental Prospectsmentioning

confidence: 99%

See 1 more Smart Citation

Low-lying excitation modes of trapped dipolar Fermi gases: From the collisionless to the hydrodynamic regime

2017

View full text Add to dashboard Cite

show abstract

“…Without loss of generality, we choose a laser with a wavelength of 1064 nm as used by or suggested in Refs. [24, 32]. The two v = 0 polarizabilities are then α || = 1013.4( ea 0 ) 2 / E h or α || / h = 4.749 × 10 −5 MHz/(W/cm 2 ), and α ⊥ = 361.46( ea 0 ) 2 / E h or α ⊥ / h = 1.694 × 10 −5 MHz/(W/cm 2 ).…”

Section: The 23na40k Dimermentioning

confidence: 99%

“…Initial experimental realizations applied electric fields up to a few kV/cm. Larger electric field apparatuses are now under development [9, 10] with fields above 10 kV/cm promising larger dipole moments and individual addressing and detection.…”

Section: Introductionmentioning

confidence: 99%

Pendular trapping conditions for ultracold polar molecules enforced by external electric fields

Petrov

Makrides

et al. 2017

Phys. Rev. A

View full text Add to dashboard Cite

We theoretically investigate trapping conditions for ultracold polar molecules in optical lattices, when external magnetic and electric fields are simultaneously applied. Our results are based on an accurate electronic-structure calculation of the polar 23Na40K polar molecule in its absolute ground state combined with a calculation of its rovibrational-hyperfine motion. We find that an electric field strength of 5.26(15) kV/cm and an angle of 54.7° between this field and the polarization of the optical laser lead to a trapping design for 23Na40K molecules where decoherences due laser-intensity fluctuations and fluctuations in the direction of its polarization are kept to a minimum. One standard deviation systematic and statistical uncertainties are given in parenthesis. Under such conditions pairs of hyperfine-rotational states of v = 0 molecules, used to induce tunable dipole-dipole interactions between them, experience ultrastable, matching trapping forces.

show abstract

Enhanced Optical and Electric Manipulation of a Quantum Gas of KRb Molecules

Covey¹

2018

Springer Theses

View full text Add to dashboard Cite

Reens on the OH Stark decellerator for invaluable advice on AC and DC electric fields.We have also had a very fruitful collaboration with Ana Maria Rey's group. In particular we worked with Michael Foss-Feig and Kaden Hazzard in the early years, and more recently Michael Wall, Martin Garttner, Arghavan Safavi-Naini, and Bihui Zhu. They have all done an excellent job being aware of what our experiment is capable of, and giving us space when we need to address technical issues. We attempted the spin-exchange measurements after Kaden and Ana Maria suggested that we would be able to observe them in the lattice even at our relatively low filling fraction at that time.The JILA instrument shop played a very significant role in much of the work in this thesis, and I have spent a lot of time working with Tracy Keep, Kels Detra, Kim Hagen, Blaine Horner, Todd Asnicar, and Hans Greene. Tracy made the primary contributions to the new apparatus, and was very helpful along the entire journey to address every problem that emerged. A lot can change in six years, and the JILA instrument shop during my PhD is an excellent example of that. Tracy recently passed away after battling with cancer. Kels left JILA a few years ago. Blaine recently retired. Nevertheless, the JILA instrument shops remains an incredible resource.The JILA electronics shop and computing team have been invaluable to our experiment.Terry Brown and Carl Sauer are always available to help us with any electrical or electronics problem, particularly high voltage or AC circuits. Their expertise has played a significant role in the electronics of the new apparatus, such as the servos for large electric fields and the rf and microwave coils for K and Rb spin flips. J. R. Raith in computing has been very helpful with all of our computing needs over the years.On a more personal note, I am thankful to Dan Gresh (Cornell group, eEDM experiment, JILA) for his friendship over the past six years, and for teaching me the art of powerlifting. I viii am also grateful to Rory Barton-Grimley (Aerospace Eng., CU-Boulder) for his friendship and for getting me back into hockey. I have enjoyed playing with him and Carrie Weidner, Seth Caliga, and Cam Straatsma (Anderson group, JILA) over the past several years. I would also like to thank my family for their constant support over the past six years, especially my fiancé Jennifer. 7.5 The electric field orientations that are possible with the electrode configuration of the new apparatus .

show abstract

Versatile electric fields for the manipulation of ultracold NaK molecules

Cited by 16 publications

References 33 publications

Low-lying excitation modes of trapped dipolar Fermi gases: From the collisionless to the hydrodynamic regime

Low-lying excitation modes of trapped dipolar Fermi gases: From the collisionless to the hydrodynamic regime

Pendular trapping conditions for ultracold polar molecules enforced by external electric fields

Enhanced Optical and Electric Manipulation of a Quantum Gas of KRb Molecules

Contact Info

Product

Resources

About