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Microscopic model for the stacking-fault potential and the exciton wave function in GaAs
Two-dimensional stacking fault defects embedded in a bulk crystal can provide a homogeneous trapping potential for carriers and excitons. Here we utilize state-of-the-art structural imaging cou- pled with density functional and effective-mass theory to build a microscopic model of the stacking- fault exciton. The diamagnetic shift and exciton dipole moment at different magnetic fields are calculated and compared with the experimental photoluminescence of excitons bound to a single stacking fault in GaAs. The model is used to further provide insight into the properties of excitons bound to the double-well potential formed by stacking fault pairs. This microscopic exciton model can be used as an input into models which include exciton-exciton interactions to determine the excitonic phases accessible in this system.
Dissecting Biexciton Wave Functions of Self-Assembled Quantum Dots by Double-Quantum-Coherence Optical Spectroscopy
Abstract not provided
Ground-state wave function of plutonium in PuSb as determined via x-ray magnetic circular dichroism
Measurements of x-ray magnetic circular dichroism (XMCD) and x-ray absorption near-edge structure (XANES) spectroscopy at the Pu M₄,₅ edges of the ferromagnet PuSb are reported. Using bulk magnetization measurements and a sum rule analysis of the XMCD spectra, we determine the individual orbital [μ L = 2.8(1)μ B /Pu] and spin moments [μ S = –2.0(1)μ B /Pu] of the Pu 5f electrons for the first time. Atomic multiplet calculations of the XMCD and XANES spectra reproduce well the experimental data and are consistent with the experimental value of the spin moment. These measurements of L z and S z are in excellent agreement with the values that have been extracted from neutron magnetic form factor measurements, and confirm the local character of the 5f electrons in PuSb. We demonstrate that a split M₅ as well as a narrow M₄ XMCD signal may serve as a signature of 5f electron localization in actinide compounds.
Majorana wave-function oscillations, fermion parity switches, and disorder in Kitaev chains
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Single-hole wave function in two dimensions: A case study of the doped Mott insulator
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Frame-independent spatial coordinate z ̃ : Implications for light-front wave functions, deep inelastic scattering, light-front holography, and lattice QCD calculations
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Wave-function-based emulation for nucleon-nucleon scattering in momentum space
Emulators for low-energy nuclear physics can provide fast and accurate predictions of bound-state and scattering observables for applications that require repeated calculations with different parameters, such as Bayesian uncertainty quantification. In this paper, we extend a scattering emulator based on the Kohn variational principle (KVP) to momentum space (including coupled channels) with arbitrary boundary conditions, which enable the mitigation of spurious singularities known as Kohn anomalies. We test it on a modern chiral nucleon-nucleon (N N) interaction, including emulation of the coupled channels. We provide comparisons between a Lippmann-Schwinger equation emulator and our KVP momentum-space emulator for a representative set of neutron-proton (n p) scattering observables, and also introduce a quasi-spline-based approach for the KVP-based emulator. Furthermore, our findings show that while there are some trade-offs between accuracy and speed, all three emulators perform well. Self-contained Jupyter notebooks that generate the results and figures in this paper are publicly available.
Scattering cluster wave functions on the lattice using the adiabatic projection method
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Light-front wave functions of mesons, baryons, and pentaquarks with topology-induced local four-quark interaction
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Computing light-front wave functions without light-front quantization: A large-momentum effective theory approach
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