23 citations · 123 across the 17 of their papers we have counts for
17 papers
A passive atomtronics filter for Fermi gases
Jun Hao Hue, Martin-Isbjörn Trappe, Piotr T. Grochowski +2
We design an atomtronic filter device that spatially separates the components of a two-component Fermi gas with repulsive contact interactions in a two-dimensional geometry. With t…
Phase separation of a repulsive two-component Fermi gas at the two- to three-dimensional crossover
Piotr T. Grochowski, Martin-Isbjörn Trappe, Tomasz Karpiuk +1
We present a theoretical analysis of phase separations between two repulsively interacting components in an ultracold fermionic gas, occurring at the dimensional crossover in a har…
Single-particle-exact density functional theory
Martin-Isbjörn Trappe, Jun Hao Hue, Jonah Huang Zi Chao +4
We introduce 'single-particle-exact density functional theory' (1pEx-DFT), a novel density functional approach that represents all single-particle contributions to the energy with…
Atoms, dimers, and nanoparticles from orbital-free density-potential functional theory
Martin-Isbjörn Trappe, William C. Witt, Sergei Manzhos
Density-potential functional theory (DPFT) is an alternative formulation of orbital-free density functional theory that may be suitable for modeling the electronic structure of lar…
Contactium: A strongly correlated model system
Jerzy Cioslowski, Berthold-Georg Englert, Martin-Isbjörn Trappe +1
At the limit of an infinite confinement strength , the ground state of a system that comprises two fermions or bosons in a harmonic confinement interacting through the Fermi--Hu…
Energy functionals of single-particle densities: A unified view
Berthold-Georg Englert, Jun Hao Hue, Zi Chao Huang +2
Density functional theory is usually formulated in terms of the density in configuration space. Functionals of the momentum-space density have also been studied, and yet other dens…
Density-potential functional theory for fermions in one dimension
Martin-Isbjörn Trappe, Jun Hao Hue, Berthold-Georg Englert
We showcase the advantages of orbital-free density-potential functional theory (DPFT), a more flexible variant of Hohenberg-Kohn density functional theory. DPFT resolves the usual…
Phase Transitions of Repulsive Two-Component Fermi Gases in Two Dimensions
Martin-Isbjörn Trappe, Piotr T. Grochowski, Jun Hao Hue +2
We predict the phase separations of two-dimensional Fermi gases with repulsive contact-type interactions between two spin components. Using density-potential functional theory with…
Fourth-order leapfrog algorithms for numerical time evolution of classical and quantum systems
Jun Hao Hue, Ege Eren, Shao Hen Chiew +5
Chau et al. [New J. Phys. 20, 073003 (2018)] presented a new and straight-forward derivation of a fourth-order approximation '' of the time-evolution operator and hinted at it…
First-principles quantum corrections for carrier correlations in double-layer two-dimensional heterostructures
Martin-Isbjörn Trappe, Derek Y. H. Ho, Shaffique Adam
We present systematic ab initio calculations of the charge carrier correlations between adjacent layers of two-dimensional materials in the presence of both charged impurity and st…
Systematic corrections to the Thomas-Fermi approximation without a gradient expansion
Thanh Tri Chau, Jun Hao Hue, Martin-Isbjörn Trappe +1
We improve on the Thomas-Fermi approximation for the single-particle density of fermions by introducing inhomogeneity corrections. Rather than invoking a gradient expansion, we rel…
Airy-averaged gradient corrections for two-dimensional fermion gases
Martin-Isbjörn Trappe, Yink Loong Len, Hui Khoon Ng +1
Building on the discussion in PRA 93, 042510 (2016), we present a systematic derivation of gradient corrections to the kinetic-energy functional and the one-particle density, in pa…
Geometric phases causing lifetime modifications of metastable states of hydrogen
Martin-Isbjörn Trappe, Peter Augenstein, Maarten DeKieviet +2
Externally applied electromagnetic fields in general have an influence on the width of atomic spectral lines. The decay rates of atomic states can also be affected by the geometry…
Leading gradient correction to the kinetic energy for two-dimensional fermion gases
Martin-Isbjörn Trappe, Yink Loong Len, Hui Khoon Ng +2
Density functional theory (DFT) is notorious for the absence of gradient corrections to the two-dimensional (2D) Thomas-Fermi kinetic-energy functional; it is widely accepted that…
Ground-state densities of repulsive two-component Fermi gases
M. I. Trappe, P. Grochowski, M. Brewczyk +1
We investigate separations of trapped balanced two-component atomic Fermi gases with repulsive contact interaction. Candidates for ground-state densities are obtained from the imag…
Semiclassical spectral function for matter waves in random potentials
Martin-Isbjörn Trappe, Dominique Delande, Cord A. Müller
An -expansion is presented for the ensemble-averaged spectral function of noninteracting matter waves in random potentials. We obtain the leading quantum corrections to the…
Longitudinal Atomic Beam Spin Echo Experiments: A possible way to study Parity Violation in Hydrogen
M. DeKieviet, T. Gasenzer, O. Nachtmann +1
We discuss the propagation of hydrogen atoms in static electric and magnetic fields in a longitudinal atomic beam spin echo (lABSE) apparatus. Depending on the choice of the extern…