arXiv:quant-ph/0406085 · Physical Review A

P -wave Feshbach resonances of ultracold Li6

J. Zhang, E. G. M. van Kempen, Thomas Bourdel, Lev Khaykovich, J. Cubizolles, Frédéric Chevy, Martin Teichmann, Leticia Tarruell, S. J. J. M. F. Kokkelmans, Ch Salomon

Published Sep 30, 2004• 231 citations

arXiv HTML PDF

Abstract

We report the observation of three $p$-wave Feshbach resonances of $^{6}\mathrm{Li}$ atoms in the lowest hyperfine state $f=1∕2$. The positions of the resonances are in good agreement with theory. We study the lifetime of the cloud in the vicinity of the Feshbach resonances and show that, depending on the spin states, two- or three-body mechanisms are at play. In the case of dipolar losses, we observe a nontrivial temperature dependence that is well explained by a simple model.

DOI: 10.1103/physreva.70.030702

Related papers

Feshbach resonances in mixtures of ultracold Li6 and Rb87 gases

Benjamin Deh, C. Marzok, Claus Zimmermann +1 more

arXiv:0709.4554Physical Review AJan 8, 200884 citations

Orbital-resolved three-body recombination across a p-wave Feshbach resonance in ultracold $^6$Li

Shaokun Liu, Z. P. Xu, Peng, Shuai +4 more

arXiv:2512.02479Dec 2, 20250 citations

Feshbach Resonances in p -Wave Three-Body Recombination within Fermi-Fermi Mixtures of Open-Shell Li6 and Closed-Shell Yb173 Atoms

Alaina Green, Hui Li, Jun Hui See Toh +6 more

arXiv:1912.04874Physical Review XAug 14, 202055 citations

Orbital-resolved three-body recombination across a p -wave Feshbach resonance in ultracold 6 Li

Shaokun Liu, Z. P. Xu, Shuai Peng +4 more

Reports on Progress in PhysicsFeb 1, 20263 citations

Decay of an Ultracold Fermionic Lithium Gas near a Feshbach Resonance

Kai Dieckmann, Claudiu Andrei Stan, Subhadeep Gupta +3 more

arXiv:cond-mat/0207046Physical Review LettersOct 24, 2002158 citations

Observation of a broad state-to-state spin-exchange collision near a p-wave Feshbach resonances of $^6$Li atoms

Shuai Peng, Tangqian Shu, Bo-Wen Si +6 more

arXiv:2406.01248Jun 3, 20240 citations

arXiv:quant-ph/0406085 · Physical Review A

P -wave Feshbach resonances of ultracold Li6

J. Zhang, E. G. M. van Kempen, Thomas Bourdel, Lev Khaykovich, J. Cubizolles, Frédéric Chevy, Martin Teichmann, Leticia Tarruell, S. J. J. M. F. Kokkelmans, Ch Salomon

Published Sep 30, 2004• 231 citations

arXiv HTML PDF

Abstract

We report the observation of three

p

-wave Feshbach resonances of

^{6}\mathrm{Li}

atoms in the lowest hyperfine state

f=1∕2

. The positions of the resonances are in good agreement with theory. We study the lifetime of the cloud in the vicinity of the Feshbach resonances and show that, depending on the spin states, two- or three-body mechanisms are at play. In the case of dipolar losses, we observe a nontrivial temperature dependence that is well explained by a simple model.

DOI: 10.1103/physreva.70.030702

Related papers

Feshbach resonances in mixtures of ultracold Li6 and Rb87 gases

Benjamin Deh, C. Marzok, Claus Zimmermann +1 more

We report on the observation of two Feshbach resonances in collisions between ultracold $^{6}\mathrm{Li}$ and $^{87}\mathrm{Rb}$ atoms in their respective hyperfine ground states $\ensuremath{\mid}F,{m}_{F}⟩=\ensuremath{\mid}1∕2,1∕2⟩$ and \ensuremath{\mid}1,1⟩. The resonances show up as trap losses for the $^{6}\mathrm{Li}$ cloud induced by inelastic Li-Rb-Rb three-body collisions. The magnetic field values where they occur represent important benchmarks for an accurate determination of the interspecies interaction potentials. A broad Feshbach resonance located at $1066.92\phantom{\rule{0.3em}{0ex}}\mathrm{G}$ opens interesting prospects for the creation of ultracold heteronuclear molecules. We furthermore observe a strong enhancement of the narrow $p$ -wave Feshbach resonance in collisions of $^{6}\mathrm{Li}$ atoms at $158.55\phantom{\rule{0.3em}{0ex}}\mathrm{G}$ in the presence of a dense $^{87}\mathrm{Rb}$ cloud. The effect of the $^{87}\mathrm{Rb}$ cloud is to introduce Li-Li-Rb three-body collisions occurring at a higher rate than Li-Li-Li collisions.We report on the observation of two Feshbach resonances in collisions between ultracold $^{6}\mathrm{Li}$ and $^{87}\mathrm{Rb}$ atoms in their respective hyperfine ground states $\ensuremath{\mid}F,{m}_{F}⟩=\ensuremath{\mid}1∕2,1∕2⟩$ and \ensuremath{\mid}1,1⟩. The resonances show up as trap losses for the $^{6}\mathrm{Li}$ cloud induced by inelastic Li-Rb-Rb three-body collisions. The magnetic field values where they occur represent important benchmarks for an accurate determination of the interspecies interaction potentials. A broad Feshbach resonance located at $1066.92\phantom{\rule{0.3em}{0ex}}\mathrm{G}$ opens interesting prospects for the creation of ultracold heteronuclear molecules. We furthermore observe a strong enhancement of the narrow $p$-wave Feshbach resonance in collisions of $^{6}\mathrm{Li}$ atoms at $158.55\phantom{\rule{0.3em}{0ex}}\mathrm{G}$ in the presence of a dense $^{87}\mathrm{Rb}$ cloud. The effect of the $^{87}\mathrm{Rb}$ cloud is to introduce Li-Li-Rb three-body collisions occurring at a higher rate than Li-Li-Li collisions.

arXiv:0709.4554Physical Review AJan 8, 200884 citations

Orbital-resolved three-body recombination across a p-wave Feshbach resonance in ultracold $^6$ LiOrbital-resolved three-body recombination across a p-wave Feshbach resonance in ultracold $^6$Li

Shaokun Liu, Z. P. Xu, Peng, Shuai +4 more

We report precision, orbital-resolved measurements of three-body recombination near the 159~G $p$ -wave Feshbach resonance in an ultracold gas of $^{6}$ Li atoms prepared in their lowest hyperfine state. Using a radio-frequency gated protocol that suppresses magnetic-field transients below the milligauss level, we resolve loss features associated with the $|m_\ell|=1$ and $m_\ell=0$ orbital projections. The measured three-body loss coefficient $L_3$ is well captured by a thermally averaged cascade-recombination model, enabling extraction of the resonance splitting $δB$ and effective-range parameter $k_e$ . At the lowest temperature, we obtain $δB = 7.6(3)$ ~mG and $k_e = 0.151(6)\,a_0^{-1}$ , both in quantitative agreement with coupled-channel theory. These results establish orbital-resolved three-body spectroscopy as a precision probe of $p$ -wave scattering and provide a benchmark for microscopic models of resonant few-body loss.We report precision, orbital-resolved measurements of three-body recombination near the 159~G $p$-wave Feshbach resonance in an ultracold gas of $^{6}$Li atoms prepared in their lowest hyperfine state. Using a radio-frequency gated protocol that suppresses magnetic-field transients below the milligauss level, we resolve loss features associated with the $|m_\ell|=1$ and $m_\ell=0$ orbital projections. The measured three-body loss coefficient $L_3$ is well captured by a thermally averaged cascade-recombination model, enabling extraction of the resonance splitting $δB$ and effective-range parameter $k_e$. At the lowest temperature, we obtain $δB = 7.6(3)$~mG and $k_e = 0.151(6)\,a_0^{-1}$, both in quantitative agreement with coupled-channel theory. These results establish orbital-resolved three-body spectroscopy as a precision probe of $p$-wave scattering and provide a benchmark for microscopic models of resonant few-body loss.

arXiv:2512.02479Dec 2, 20250 citations

Feshbach Resonances in p -Wave Three-Body Recombination within Fermi-Fermi Mixtures of Open-Shell Li6 and Closed-Shell Yb173 Atoms

Alaina Green, Hui Li, Jun Hui See Toh +6 more

We report on the observation of magnetic Feshbach resonances in a Fermi-Fermi mixture of ultracold atoms with extreme mass imbalance and on their unique p-wave dominated three-body recombination processes.Our system consists of open-shell alkali-metal 6 Li and closed-shell 173 Yb atoms, both spin polarized and held at various temperatures between 1 and 20 μK.We confirm that Feshbach resonances in this system are solely the result of a weak separation-dependent hyperfine coupling between the electronic spin of 6 Li and the nuclear spin of 173 Yb.Our analysis also shows that three-body recombination rates are controlled by the identical fermion nature of the mixture, even in the presence of s-wave collisions between the two species and with recombination rate coefficients outside the Wigner threshold regime at our lowest temperature.Specifically, a comparison of experimental and theoretical line shapes of the recombination process indicates that the characteristic asymmetric line shape as a function of applied magnetic field and a maximum recombination rate coefficient that is independent of temperature can only be explained by triatomic collisions with nonzero, p-wave total orbital angular momentum.The resonances can be used to form ultracold doublet ground-state molecules and to simulate quantum superfluidity in mass-imbalanced mixtures.We report on the observation of magnetic Feshbach resonances in a Fermi-Fermi mixture of ultracold atoms with extreme mass imbalance and on their unique p-wave dominated three-body recombination processes.Our system consists of open-shell alkali-metal 6 Li and closed-shell 173 Yb atoms, both spin polarized and held at various temperatures between 1 and 20 μK.We confirm that Feshbach resonances in this system are solely the result of a weak separation-dependent hyperfine coupling between the electronic spin of 6 Li and the nuclear spin of 173 Yb.Our analysis also shows that three-body recombination rates are controlled by the identical fermion nature of the mixture, even in the presence of s-wave collisions between the two species and with recombination rate coefficients outside the Wigner threshold regime at our lowest temperature.Specifically, a comparison of experimental and theoretical line shapes of the recombination process indicates that the characteristic asymmetric line shape as a function of applied magnetic field and a maximum recombination rate coefficient that is independent of temperature can only be explained by triatomic collisions with nonzero, p-wave total orbital angular momentum.The resonances can be used to form ultracold doublet ground-state molecules and to simulate quantum superfluidity in mass-imbalanced mixtures.

arXiv:1912.04874Physical Review XAug 14, 202055 citations

Orbital-resolved three-body recombination across a p -wave Feshbach resonance in ultracold 6 Li

Shaokun Liu, Z. P. Xu, Shuai Peng +4 more

Abstract We report precision, orbital-resolved measurements of three-body recombination near the 159 G p -wave Feshbach resonance in an ultracold gas of 6 Li atoms prepared in their lowest hyperfine state. Using a radio-frequency gated protocol that suppresses magnetic-field transients below the milligauss level, we resolve loss features associated with the | m ℓ | = 1 and m ℓ = 0 orbital projections. The measured three-body loss coefficient L 3 is well captured by a thermally averaged cascade-recombination model, enabling extraction of the resonance splitting δ B and effective-range parameter k e . At the lowest temperature, we obtain δ B = 7.6 ( 3 ) mG and k e = 0.151 ( 6 ) a 0 − 1 , both in quantitative agreement with coupled-channel theory. These results establish orbital-resolved three-body spectroscopy as a precision probe of p -wave scattering and provide a benchmark for microscopic models of resonant few-body loss.Abstract We report precision, orbital-resolved measurements of three-body recombination near the 159 G p -wave Feshbach resonance in an ultracold gas of 6 Li atoms prepared in their lowest hyperfine state. Using a radio-frequency gated protocol that suppresses magnetic-field transients below the milligauss level, we resolve loss features associated with the | m ℓ | = 1 and m ℓ = 0 orbital projections. The measured three-body loss coefficient L 3 is well captured by a thermally averaged cascade-recombination model, enabling extraction of the resonance splitting δ B and effective-range parameter k e . At the lowest temperature, we obtain δ B = 7.6 ( 3 ) mG and k e = 0.151 ( 6 ) a 0 − 1 , both in quantitative agreement with coupled-channel theory. These results establish orbital-resolved three-body spectroscopy as a precision probe of p -wave scattering and provide a benchmark for microscopic models of resonant few-body loss.

Reports on Progress in PhysicsFeb 1, 20263 citations

Decay of an Ultracold Fermionic Lithium Gas near a Feshbach Resonance

Kai Dieckmann, Claudiu Andrei Stan, Subhadeep Gupta +3 more

We studied the magnetic field dependence of the inelastic decay of an ultracold, optically trapped fermionic 6Li gas of different spin compositions. The spin mixture of the two lowest hyperfine states showed two decay resonances at 550 and 680 G, consistent with the predicted Feshbach resonances for elastic s-wave collisions. The observed lifetimes of several hundred ms are much longer than the expected time for Cooper pair formation and the phase transition to superfluidity in the vicinity of the Feshbach resonance.We studied the magnetic field dependence of the inelastic decay of an ultracold, optically trapped fermionic 6Li gas of different spin compositions. The spin mixture of the two lowest hyperfine states showed two decay resonances at 550 and 680 G, consistent with the predicted Feshbach resonances for elastic s-wave collisions. The observed lifetimes of several hundred ms are much longer than the expected time for Cooper pair formation and the phase transition to superfluidity in the vicinity of the Feshbach resonance.

arXiv:cond-mat/0207046Physical Review LettersOct 24, 2002158 citations

Observation of a broad state-to-state spin-exchange collision near a p-wave Feshbach resonances of $^6$ Li atomsObservation of a broad state-to-state spin-exchange collision near a p-wave Feshbach resonances of $^6$Li atoms

Shuai Peng, Tangqian Shu, Bo-Wen Si +6 more

The study of state-to-state spin-exchange collisions in the vicinity of $p$ -wave Feshbach resonances offer great opportunities to explore many-body interactions and novel quantum phases. Here, we report the observation of a spin-exchange collision near a $p$ -wave Feshbach resonance within a mixture of the lowest and third-lowest hyperfine states of $^6$ Li atoms. The spin-exchange interaction is observed over a range of ten gausses and produces a pair of atoms in the second-lowest hyperfine states that are captured by a deep optical dipole trap. We apply a coupled-channel method to calculate the scattering properties of this system. We find that the $p$ -wave resonance exhibits a low inelastic collision rate and a broad resonance profile, which is due to the modification by the accompanying spin-exchange collisions. These findings open up new possibilities for the creation of long-lived, strongly interacting $p$ -wave Fermi gases.The study of state-to-state spin-exchange collisions in the vicinity of $p$-wave Feshbach resonances offer great opportunities to explore many-body interactions and novel quantum phases. Here, we report the observation of a spin-exchange collision near a $p$-wave Feshbach resonance within a mixture of the lowest and third-lowest hyperfine states of $^6$Li atoms. The spin-exchange interaction is observed over a range of ten gausses and produces a pair of atoms in the second-lowest hyperfine states that are captured by a deep optical dipole trap. We apply a coupled-channel method to calculate the scattering properties of this system. We find that the $p$-wave resonance exhibits a low inelastic collision rate and a broad resonance profile, which is due to the modification by the accompanying spin-exchange collisions. These findings open up new possibilities for the creation of long-lived, strongly interacting $p$-wave Fermi gases.

arXiv:2406.01248Jun 3, 20240 citations

We report the observation of three

p

-wave Feshbach resonances of

^{6}\mathrm{Li}

atoms in the lowest hyperfine state

f=1∕2

We report on the observation of two Feshbach resonances in collisions between ultracold

^{6}\mathrm{Li}

and

^{87}\mathrm{Rb}

atoms in their respective hyperfine ground states $\ensuremath{\mid}F,{m}_{F}⟩=\ensuremath{\mid}1∕2,1∕2⟩$ and \ensuremath{\mid}1,1⟩. The resonances show up as trap losses for the

^{6}\mathrm{Li}

cloud induced by inelastic Li-Rb-Rb three-body collisions. The magnetic field values where they occur represent important benchmarks for an accurate determination of the interspecies interaction potentials. A broad Feshbach resonance located at

1066.92\phantom{\rule{0.3em}{0ex}}\mathrm{G}

opens interesting prospects for the creation of ultracold heteronuclear molecules. We furthermore observe a strong enhancement of the narrow

p

-wave Feshbach resonance in collisions of

^{6}\mathrm{Li}

atoms at

158.55\phantom{\rule{0.3em}{0ex}}\mathrm{G}

in the presence of a dense

^{87}\mathrm{Rb}

cloud. The effect of the

^{87}\mathrm{Rb}

cloud is to introduce Li-Li-Rb three-body collisions occurring at a higher rate than Li-Li-Li collisions.

Orbital-resolved three-body recombination across a p-wave Feshbach resonance in ultracold

^6

We report precision, orbital-resolved measurements of three-body recombination near the 159~G

p

-wave Feshbach resonance in an ultracold gas of

^{6}

Li atoms prepared in their lowest hyperfine state. Using a radio-frequency gated protocol that suppresses magnetic-field transients below the milligauss level, we resolve loss features associated with the

|m_\ell|=1

and

m_\ell=0

orbital projections. The measured three-body loss coefficient

L_3

is well captured by a thermally averaged cascade-recombination model, enabling extraction of the resonance splitting

δB

and effective-range parameter

k_e

. At the lowest temperature, we obtain

δB = 7.6(3)

~mG and

k_e = 0.151(6)\,a_0^{-1}

, both in quantitative agreement with coupled-channel theory. These results establish orbital-resolved three-body spectroscopy as a precision probe of

p

-wave scattering and provide a benchmark for microscopic models of resonant few-body loss.

Observation of a broad state-to-state spin-exchange collision near a p-wave Feshbach resonances of

^6

Li atoms

The study of state-to-state spin-exchange collisions in the vicinity of

p

-wave Feshbach resonances offer great opportunities to explore many-body interactions and novel quantum phases. Here, we report the observation of a spin-exchange collision near a

p

-wave Feshbach resonance within a mixture of the lowest and third-lowest hyperfine states of

^6

Li atoms. The spin-exchange interaction is observed over a range of ten gausses and produces a pair of atoms in the second-lowest hyperfine states that are captured by a deep optical dipole trap. We apply a coupled-channel method to calculate the scattering properties of this system. We find that the

p

-wave resonance exhibits a low inelastic collision rate and a broad resonance profile, which is due to the modification by the accompanying spin-exchange collisions. These findings open up new possibilities for the creation of long-lived, strongly interacting

p

-wave Fermi gases.