Studies of x-ray emission properties of photoionized plasmas

Wang, Feilu; Han, Bo; Jin, Runsen; Salzmann, David; Liang, G. Y.; Wei, Huigang; Zhong, Jiayong; Zhao, Gang; Li, Jiaming

doi:10.1088/0953-4075/49/6/064013

Cited by 6 publications

(6 citation statements)

References 51 publications

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“…We will take the inter-atomic scattering length a 12 as tunable at will. This mixture has been recently studied [22] and proven to be a good candidate to investigate interactiondriven effects in a superfluid Bose mixture with a largely tunable inter-species interactions (both repulsive and attractive). We are interested in the regime where selfbound states appear, i.e.…”

Section: Density Functional Approachmentioning

confidence: 99%

Self-bound ultradilute Bose mixtures within local density approximation

et al. 2018

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We have investigated self-bound ultra dilute bosonic binary mixtures at zero temperature within Density Functional Theory using a Local Density Approximation. We provide the explicit expression of the Lee-Huang-Yang correction in the general case of heteronuclear mixtures, and investigate the general thermodynamic conditions which lead to the formation of self-bound systems. We have determined the conditions for stability against the evaporation of one component, as well as the mechanical and diffusive spinodal lines. We have also calculated the surface tension of the selfbound state as a function of the inter-species interaction strength. We find that relatively modest variations of the latter result in order-of-magnitude changes in the calculated surface tension. We suggest experimental realizations which might display the metastability and phase separation of the mixture when entering regions of the phase diagram characterized by negative pressures. Finally, we show that these droplets may sustain stable vortex and vortex pairs.

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Section: Density Functional Approachmentioning

confidence: 99%

Self-bound ultradilute Bose mixtures within local density approximation

et al. 2018

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“…Numerous groups have experimentally realized binary BECs by combining different elements [35][36][37][38][39][40], isotopes [41][42][43], hyperfine states [44][45][46][47], and even different spin states [48]. There has also been considerable theoretical attention, e.g.…”

Section: Introductionmentioning

confidence: 99%

Enhanced quantum spin fluctuations in a binary Bose-Einstein condensate

2018

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For quantum fluids, the role of quantum fluctuations may be significant in several regimes such as when the dimensionality is low, the density is high, the interactions are strong, or for low particle numbers. In this paper we propose a fundamentally different regime for enhanced quantum fluctuations without being restricted by any of the above conditions. Instead, our scheme relies on the engineering of an effective attractive interaction in a dilute, two-component Bose-Einstein condensate (BEC) consisting of thousands of atoms. In such a regime, the quantum spin fluctuations are significantly enhanced (atom bunching with respect to the noninteracting limit) since they act to reduce the interaction energy -a remarkable property given that spin fluctuations are normally suppressed (anti-bunching) at zero temperature. In contrast to the case of true attractive interactions, our approach is not vulnerable to BEC collapse. We numerically demonstrate that these quantum fluctuations are experimentally accessible by either spin or single-component Bragg spectroscopy, offering a useful platform on which to test beyond-mean-field theories. We also develop a variational model and use it to analytically predict the shift of the immiscibility critical point, finding good agreement with our numerics.

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“…According to the above results, the line ratios are influenced by the satellite lines and the PR effect. The He-α lines are surrounded by a lot of intense satellite lines, especially the forbidden line [19,25,38] , and these can hardly be distinguished from each other. Thus, under some low resolution conditions, the influence of satellite lines needs to be taken into account in the calculation of line intensities.…”

Section: Line Ratiosmentioning

confidence: 99%

Emission mechanism for the silicon He-α lines in a photoionization experiment

Han

Wang

Salzmann

et al. 2021

High Pow Laser Sci Eng

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In this paper, we present a reanalysis of the silicon He- $\mathrm{\alpha}$ X-ray spectrum emission in Fujioka et al.’s 2009 photoionization experiment. The computations were performed with our radiative-collisional code, RCF. The central ingredients of our computations are accurate atomic data, inclusion of satellite lines from doubly excited states and accounting for the reabsorption of the emitted photons on their way to the spectrometer. With all these elements included, the simulated spectrum turns out to be in good agreement with the experimental spectrum.

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Studies of x-ray emission properties of photoionized plasmas

Cited by 6 publications

References 51 publications

Self-bound ultradilute Bose mixtures within local density approximation

Self-bound ultradilute Bose mixtures within local density approximation

Enhanced quantum spin fluctuations in a binary Bose-Einstein condensate

Emission mechanism for the silicon He-α lines in a photoionization experiment

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