Advanced search

Found 5 essays matching the above criteria.

1. 1. Quantum thermodynamics explorations with a Hubbard-Holstein dimer

   University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

   Author : Emil Adam Jonatan Östberg; [2021]
   Keywords : QTD Quantum Thermodynamics Hubbard-Holstein Hubbard Holstein dimer Lanczos Suzuki-Trotter ST Exact diagonalization ED Hysteresis Path dependence Battery Mott-insulator; Physics and Astronomy;

   Abstract : The goal of this project is to characterize the quantum thermodynamics of a Hubbard-Holstein dimer. We explore how the standard formalism of quantum thermodynamics behaves in the context many-body physics. READ MORE

3. 2. HOW IMAGE DOWNSCALING AND JPEG COMPRESSION AFFECTS IMAGE CLASSIFICATION PERFORMANCE - An experimental study

   University essay from Umeå universitet/Institutionen för datavetenskap

   Author : Alexander Hjältén; [2019]
   Keywords : ;

   Abstract : th‘e quality of an image plays a role in how well it can be correctly classi€fied by an image classifying neural network. Artifacts such as blur and noise reduces classi€filability. At the same time it is oft‰en motivated to reduce fi€le sizes of images which also tends to introduce artifacts and reduce their quality. READ MORE

4. 3. Optimizing the functionalities of a code for real time dynamics of finite systems

   University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

   Author : Yasser Mahfoud; [2018]
   Keywords : Physics and Astronomy;

   Abstract : The many-body problem in quantum mechanics always presents new challenges and ways to discover new properties of existing materials. The difficulty (if not the impossibility) to solve the many-body problem analytically makes the numerical methods an appealing approach. READ MORE

5. 4. X-ray absorption spectroscopy by means of Lanczos-chain driven damped coupled cluster response theory

   University essay from Institutionen för fysik, kemi och biologi

   Author : Thomas Fransson; [2011]
   Keywords : NEXAFS; coupled cluster; damped response theory; molecular properties; computational physics; theoretical chemistry; X-ray absorption spectroscopy;

   Abstract : A novel method by which to calculate the near edge X-rayabsorption fine structure region of the X-ray absorption spectrum has been derived and implemented. By means of damped coupled cluster theory at coupled cluster levels CCS, CC2, CCSD and CCSDR(3), the spectra of neon and methane have been investigated. READ MORE

6. 5. Exact Diagonalization of Few-electron Quantum Dots

   University essay from Institutionen för datavetenskap, fysik och matematik, DFM

   Author : Shirin Hakimi; [2009]
   Keywords : two-dimensional quantum dot; strongly correlated system; few-electron system; exact diagonalization; Lanczos method; Landau level; fractional quantum Hall effect; Wigner crystal; Hartree-Fock approximation; Second quantization;

   Abstract : We consider a system of few electrons trapped in a two-dimensional circularquantum dot with harmonic confinement and in the presence of ahomogeneous magnetic field, with focus on the role of e-e interaction. Byperforming the exact diagonalization of the Hamiltonian in second quantization,the low-lying energy levels for spin polarized system are obtained. READ MORE