Publisher's Note: Inducing an optical Feshbach resonance via stimulated Raman coupling [Phys. Rev. A<b>71</b>, 033403 (2005)]

Thalhammer, Gregor; Theis, M.; Winkler, Klaus; Grimm, Rudolf; Denschlag, Johannes Hecker

doi:10.1103/physreva.71.039902

Cited by 33 publications

(44 citation statements)

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“…This approach leads to conclusion that the scattering length describing ultra cold collisions of the two ground state atoms can be modified by light due to the coupling with an excited bound state. This effect was demonstrated with a BoseEinstein condensate (BEC) of 87 Rb [32,33]. The expression for a scattering length modified by light can be written in the following form [25]:…”

Section: Photoassociation Resonancementioning

confidence: 99%

Line shapes of optical Feshbach resonances near the intercombination transition of bosonic ytterbium

Borkowski¹,

Ciuryło²,

Julienne

et al. 2009

Phys. Rev. A

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The properties of bosonic Ytterbium photoassociation spectra near the intercombination transition 1 S0-3 P1 are studied theoretically at ultra low temperatures. We demonstrate how the shapes and intensities of rotational components of optical Feshbach resonances are affected by mass tuning of the scattering properties of the two colliding ground state atoms. Particular attention is given to the relationship between the magnitude of the scattering length and the occurrence of shape resonances in higher partial waves of the van der Waals system. We develop a mass scaled model of the excited state potential that represents the experimental data for different isotopes. The shape of the rotational photoassociation spectrum for various bosonic Yb isotopes can be qualitatively different.

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Section: Photoassociation Resonancementioning

confidence: 99%

Line shapes of optical Feshbach resonances near the intercombination transition of bosonic ytterbium

Borkowski¹,

Ciuryło²,

Julienne

et al. 2009

Phys. Rev. A

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“…2, we show the one-particle DOS D 1 (ω) andD 2 (ω) = i=2,3,4 D i (ω) near the transition point by using Eq. (26), where the superscript denotes the band index. In the conventional BCS superfluid states, the excitation gap scales with the superfluid order parameter and we should find the coherence peak of DOS around the chemical potential.…”

Section: One-particle Density Of States (Dos)mentioning

confidence: 99%

“…Such a system may be realized in experiments, though it is difficult so far because of large losses of atoms around resonance points. In addition to Feshbach resonances induced by magnetic fields which are widely used in experiments, optical Feshbach resonances [23,24,25,26,27] and Feshbach resonances induced by dc electric fields [28,29,30,31] are, in principle, available simultaneously. With the help of combinations of three different Feshbach resonances, it is possible to tune several interactions.…”

Section: Introductionmentioning

confidence: 99%

Transition from band insulator to Bose-Einstein-condensate superfluid and Mott state of cold Fermi gases with multiband effects in optical lattices

Watanabe

Imada

2009

Phys. Rev. A

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We study two models realized by two-component Fermi gases loaded in optical lattices. We clarify that multi-band effects inevitably caused by the optical lattices generate a rich structure, when the systems crossover from the region of weakly bound molecular bosons to the region of strongly bound atomic bosons. Here the crossover can be controlled by attractive fermion interaction. One of the present models is a case with attractive fermion interaction, where an insulator-superfluid transition takes place. The transition is characterized as the transition between a band insulator and a Bose-Einstein condensate (BEC) superfluid state. Differing from the conventional BCS superfluid transition, this transition shows unconventional properties. In contrast to the one-particle excitation gap scaled by the superfluid order parameter in the conventional BCS transition, because of the multi-band effects, a large gap of one-particle density of states is retained all through the transition although the superfluid order grows continuously from zero. A reentrant transition with lowering temperature is another unconventionality. The other model is the case with coexisting attractive and repulsive interactions. Within a mean field treatment, we find a new insulating state, an orbital ordered insulator. This insulator is one candidate for the Mott insulator of molecular bosons and is the first example that the orbital internal degrees of freedom of molecular bosons appears explicitly. Besides the emergence of a new phase, a coexisting phase also appears where superfluidity and an orbital order coexist just by doping holes or particles. The insulating and superfluid particles show differentiation in momentum space as in the high-Tc cuprate superconductors.

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“…Also the B value depends on ω, but with different power. By using Feshbach resonances [34][35][36][37] we are able to keep b constant. Finally, we can introduce coefficient…”

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confidence: 99%

Electric dipoles vs. magnetic dipoles —For two molecules in a harmonic trap

Górecki

Rza̧żewski

2017

EPL

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-We study energy levels of two heteronuclear molecules moving in a spherically symmetric harmonic trap. A role of electric dipole interactions is compared and contrasted with our earlier results (O ldziejewski R. et al., EPL, 114 (2016) 46003) for two magnetic dipolar atoms. We stress the importance of a rotational energy with its value which is very high compared to the energy of a dipolar interaction. We show that dipolar forces do not play a significant role in the ground state of the system under typical experimental conditions. However, there exist excited states that exhibit anticrossings similar to the ones observed for magnetic dipoles.

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Publisher's Note: Inducing an optical Feshbach resonance via stimulated Raman coupling [Phys. Rev. A71, 033403 (2005)]

Cited by 33 publications

References 0 publications

Line shapes of optical Feshbach resonances near the intercombination transition of bosonic ytterbium

Line shapes of optical Feshbach resonances near the intercombination transition of bosonic ytterbium

Transition from band insulator to Bose-Einstein-condensate superfluid and Mott state of cold Fermi gases with multiband effects in optical lattices

Electric dipoles vs. magnetic dipoles —For two molecules in a harmonic trap

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