Energy-Dependent Three-Body Loss in 1D Bose Gases

Zundel, Laura A.; Wilson, Joshua M.; Malvania, Neel; Xia, Lin; Riou, Jean Félix; Weiss, David S.

doi:10.1103/physrevlett.122.013402

Cited by 19 publications

(12 citation statements)

References 21 publications

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“…At our lowest attainable temperatures, we observe a 74-fold suppression of the loss rate constant on resonance in quasi-1D relative to that in 3D. We go on to confirm the on-resonance scaling law and corroborate the off-resonance scaling, which mirrors that of even-parity bosons in quasi-1D [18,23]. Further, we develop a theory to explain the observed loss at intermediate fields based on Breit-Wigner analysis.…”

Section: S-wavesupporting

confidence: 58%

Suppression of Three-Body Loss Near a p-Wave Resonance Due to Quasi-1D Confinement

Marcum,

Fonta,

Ismail

et al. 2020

Preprint

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We investigate the three-body recombination rate of a Fermi gas of 6 Li atoms confined in quasi-1D near a p-wave Feshbach resonance. We confirm that the quasi-1D loss rate constant K3 follows the predicted threshold scaling law that K3 is energy independent on resonance, and find consistency with the scaling law K3 ∝ (k a1D) 6 far from resonance [Mehta et al. Phys. Rev. A 76, 022711 (2007)]. Further we develop a theory based on Breit-Wigner analysis that describes the loss feature for intermediate fields. Lastly we measure how the loss rate constant scales with transverse confinement and find that K3 ∝ V −1 L , where VL is the lattice depth. Importantly, at our attainable transverse confinements and temperatures, we see a 74-fold suppression of the on-resonant threebody loss rate constant in quasi-1D compared to 3D. With significant further enhancement of the transverse confinement, this suppression may pave the way for realizing stable p-wave superfluids.

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Section: S-wavesupporting

confidence: 58%

Suppression of Three-Body Loss Near a p-Wave Resonance Due to Quasi-1D Confinement

Marcum,

Fonta,

Ismail

et al. 2020

Preprint

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“…We do not observe any significant three-body loss as seen in Ref. [6,32]. Figure 13: An example of the horizontal imaging.…”

Section: A2 Heating Process and Atomic Lossmentioning

confidence: 50%

“…In Kinoshita et al [6] the 1D condition is guaranteed by applying a very shallow longitudinal trap, so that high energy particles can leave the 1D traps at both ends. In return, the system exhibits significant loss [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Relaxation of bosons in one dimension and the onset of dimensional crossover

Zhou

Mazets

et al. 2020

SciPost Phys.

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We study ultra-cold bosons out of equilibrium in a one-dimensional (1D) setting and probe the breaking of integrability and the resulting relaxation at the onset of the crossover from one to three dimensions. In a quantum Newton's cradle type experiment, we excite the atoms to oscillate and collide in an array of 1D tubes and observe the evolution for up to 4.8 seconds (400 oscillations) with minimal heating and loss. By investigating the dynamics of the longitudinal momentum distribution function and the transverse excitation, we observe and quantify a two-stage relaxation process. In the initial stage single-body dephasing reduces the 1D densities, thus rapidly drives the 1D gas out of the quantum degenerate regime. The momentum distribution function asymptotically approaches the distribution of quasimomenta (rapidities), which are conserved in an integrable system. In the subsequent long time evolution, the 1D gas slowly relaxes towards thermal equilibrium through the collisions with transversely excited atoms. Moreover, we tune the dynamics in the dimensional crossover by initializing the evolution with different imprinted longitudinal momenta (energies). The dynamical evolution towards the relaxed state is quantitatively described by a semiclassical molecular dynamics simulation.

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“…Although integrability is technically a fine-tuned property, many experimentally relevant one-dimensional models-such as the Hubbard, Heisenberg, and Lieb-Liniger models-are either exactly or approximately integrable [5]. The dynamics of integrable and nearly integrable models have lately been extensively studied, both theoretically [1][2][3][4][6][7][8][9][10][11][12][13][14] and experimentally [15][16][17][18][19].…”

mentioning

confidence: 99%

Anomalous low-frequency conductivity in easy-plane XXZ spin chains

Agrawal,

Gopalakrishnan,

Vasseur

et al. 2019

Preprint

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In the easy-plane regime of XXZ spin chains, spin transport is ballistic, with a Drude weight that has a discontinuous fractal dependence on the value of the anisotropy ∆ = cos πλ at nonzero temperatures. We show that this structure necessarily implies the divergence of the low-frequency conductivity for generic irrational values of λ. Within the framework of generalized hydrodynamics, we show that in the high-temperature limit the low-frequency conductivity at a generic anisotropy scales as σ(ω) ∼ 1/ √ ω; anomalous response occurs because quasiparticles undergo Lévy flights. For rational values of λ, the divergence is cut off at low frequencies and the corrections to ballistic spin transport are diffusive. We also use our approach to recover that at the isotropic point ∆ = 1, spin transport is superdiffusive with σ(ω) ∼ ω −1/3 . We support our results with extensive numerical studies using matrix-product operator methods.

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Energy-Dependent Three-Body Loss in 1D Bose Gases

Cited by 19 publications

References 21 publications

Suppression of Three-Body Loss Near a p-Wave Resonance Due to Quasi-1D Confinement

Suppression of Three-Body Loss Near a p-Wave Resonance Due to Quasi-1D Confinement

Relaxation of bosons in one dimension and the onset of dimensional crossover

Anomalous low-frequency conductivity in easy-plane XXZ spin chains

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