Publications by authors named "N V Prokof'ev"
Recently, it was argued [Kuklov et al., Phys. Rev.
View Article and Find Full Text PDFWe present results of numerically exact simulations of the Bose one-component plasma, i.e., a Bose gas with pairwise Coulomb interactions among particles and a uniform neutralizing background.
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- Precise calculations of the dynamics in the homogeneous electron gas are crucial for designing and understanding new materials.
- A new diagrammatic Monte Carlo method is introduced to compute responses directly in the real frequency domain using Feynman diagrams, focusing on charge responses at moderate electron density.
- The findings help in extracting the frequency dependence of the exchange-correlation kernel, which is essential for improving time-dependent density functional theory in material dynamics, analogous to how ground state energies benefit density functional theory.
The unique superflow-through-solid effect observed in solid ^{4}He and attributed to the quasi-one-dimensional superfluidity along the dislocation cores exhibits two extraordinary features: (i) an exponentially strong suppression of the flow by a moderate increase in pressure and (ii) an unusual temperature dependence of the flow rate with no analogy to any known system and in contradiction with the standard Luttinger liquid paradigm. Based on ab initio and model simulations, we argue that the two features are closely related: Thermal fluctuations of the shape of a superclimbing edge dislocation induce large, correlated, and asymmetric stress fields acting on the superfluid core. The critical flux is most sensitive to strong rare fluctuations and hereby acquires a sharp temperature dependence observed in experiments.
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