Josephson dynamics of superfluid Fermi gases in a double-well potential with dissipation or gain

Ji, Li; Wen, Wen; Wang, Ying; Ma, Xuekai; Li, Huijun

doi:10.1016/j.physleta.2021.127543

Cited by 3 publications

(3 citation statements)

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“…Theoretical model.-The BCS regime of the superfluid Fermi gas is studied by means of the time-dependent Bogoliubov-de Gennes (BdG) equations [18]; until now, essentially all such fermionic Josephson junction studies were limited to considerations of either static cases [19][20][21] or 1D scenarios [22] (with a simplified two-mode model considered in Refs. [23,24]).…”

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confidence: 99%

Dissipation Mechanisms in Fermionic Josephson Junction

et al. 2023

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We characterize numerically the dominant dynamical regimes in a superfluid ultracold fermionic Josephson junction. Beyond the coherent Josephson plasma regime, we discuss the onset and physical mechanism of dissipation due to the superflow exceeding a characteristic speed, and provide clear evidence distinguishing its physical mechanism across the weakly and strongly interacting limits, despite qualitative dynamics of global characteristics being only weakly sensitive to the operating dissipative mechanism. Specifically, dissipation in the strongly interacting regime occurs through the phase-slippage process, caused by the emission and propagation of quantum vortices, and sound waves-similar to the Bose-Einstein condensation limit. Instead, in the weak interaction limit, the main dissipative channel arises through the pair-breaking mechanism.

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confidence: 99%

Dissipation Mechanisms in Fermionic Josephson Junction

et al. 2023

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“…Equations ( 40) and (42), and ( 41) and ( 43), respectively, yield the following Padé-type approximants for the quasi-2D chemical potential and energy density valid along the weak coupling to unitarity crossover:…”

Section: Quasi-2d Configurationmentioning

confidence: 99%

“…To account for strong interactions, crossover models have also been proposed in the literature that connect weak-coupling and unitarity limits for bosons [38,39] and fermions [39][40][41]. The crossover model for fermions enjoyed widespread usage [42][43][44][45][46]. Nonetheless, interspecies Bose-Fermi interaction in these studies still corresponds to weakly-interacting domain.…”

Section: Introductionmentioning

confidence: 99%

Assessment of groundwater and surface water quality for irrigation suitability in Rupnagar District, Punjab, India

Kaur¹,

Paikaray²

2020

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<p>Groundwater and Sutlej river water are major sources of irrigation in Rupnagar district of Punjab. Water quality was examined for their agricultural suitability using a total of 54 surface water (16 from Sutlej and 6 from Sirsa River) and groundwater (total 32 of ~160 m depth) samples from Pre- (June 2019) and post-monsoon (Dec 2018) seasons. On-site parameters (electrical conductivity, pH, total dissolved solids) indicate permissible pH (pH 6.6-8.2) and conductivity (147-1953 &#956;S/cm), while 18.5% of samples are brackish salt to salt category type on salinity index. The results of these parameters were further interpreted and measured with different irrigation indexes like sodium percent (SP), sodium adsorption ratio (SAR), residual sodium carbonate (RSC), chloride concentrations and Wilcox diagram. Similarly, most of the samples (except Sutlej river water samples) were found to be above permissible limits with respect to SP (5.36-81.01) and RSC (0-6.23), but SAR is indicative of suitability for irrigation purposes (0.11-8.3). The suitability for irrigation as per SAR is because of low sodium content in all the samples relative to calcium and magnesium. The Wilcox diagram of pre-monsoon samples indicate high, medium and low saline to low sodium hazard except 1 sample with high saline to medium sodium hazard and salinity-sodium hazard in post-monsoon is comparatively lower than that of pre-monsoon. However careful observation of the complete data analysis suggests that all the parameters in Sutlej river water samples were found to be suitable for irrigation while most of the groundwater samples and 3 samples from Sirsa river were unfit for irrigation purposes as inferred from SP, RSC and Wilcox diagram.</p>

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