Essays about: "macroscopic quantum mechanics"

Showing result 1 - 5 of 6 essays containing the words macroscopic quantum mechanics.

1. 1. Quantum signatures in the work fluctuation-dissipation relation protocol

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

   Author : Jian Li; [2023]
   Keywords : Quantum entanglement; fluctuation; coherence; quantum information; quantum thermodynamics; Physics and Astronomy;

   Abstract : Quantum thermodynamics deals with the behavior of thermal machines that operate in the quantum regime, where coherences and entanglement can have a significant impact. However, detecting such quantum effects in thermal machines can be challenging, as they are primarily manifested as fluctuations. READ MORE

3. 2. Gravitational Decoherence in Macroscopic Quantum Systems

   University essay from Uppsala universitet/Teoretisk fysik

   Author : Niklas Engelhardt Önne; [2023]
   Keywords : decoherence; gravitational decoherence; quantum mechanics; quantum physics; macroscopic quantum mechanics; macroscopic quantum physics; gravity; general relativity; gravitational time dilation; quantum-to-classical transition; nonrelativistic quantum mechanics; quantum gravity; dekoherens; gravitationell dekoherens; kvantmekanik; kvantfysik; makroskopisk kvantmekanik; makroskopisk kvantfysik; gravitation; allmän relativitetsteori; gravitationell tidsdilatation; övergången från kvantfysik till klassisk fysik; ickerelativistisk kvantmekanik; kvantgravitation;

   Abstract : The problem of how quantum mechanics gives rise to classicality has been debated for more than a century. A commonly proposed solution is decoherence, i.e. the gradual decay of superpositions in open quantum systems due to their inevitable interaction with their environment. READ MORE

4. 3. Topological Band Theory, An Overview

   University essay from Göteborgs universitet / Institutionen för fysik

   Author : Jens Roderus; [2021-06-14]
   Keywords : ;

   Abstract : Topological insulators, superconductors and semi-metals are states of ma er with unique features such as quantized macroscopic observables and robust, gapless edge states. ese states can not be explained by standard quantum mechanics, but require also the framework of topology to be properly characterized. READ MORE

5. 4. Microscopic and Macroscopic Samples of Atoms in Superposition States Studied by Attosecond Pulses

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

   Author : Axel Stenquist; [2021]
   Keywords : Mathematical physics; Theoretical physics; Atomic physics; Attosecond physics; Ultra-fast physics; Numerical simulations; Microscopic; Mesoscopic; Macroscopic; Superposition; Light matter interaction; Quantum mechanics; Electromagnetism; Semiclassical; Attosecond transient absorption spectroscopy; ATAS; Förster resonance; FRET; Two-atom model; Inter-atomic interaction; Dipole-dipole interaction; Many-atom model; Collective coherent effects; Time-dependent configuration-interaction singles; TDCIS; Physics and Astronomy;

   Abstract : In the present thesis, the interaction between atoms in superposition states and attosecond pulses is studied from the microscopic to the macroscopic regime. Using a semi-classical framework, three different models have been explored in order to investigate attosecond light--matter interaction processes. READ MORE

6. 5. Measure of macrocoherence

   University essay from Uppsala universitet/Teoretisk fysik

   Author : Patrik Bernhardsson; [2021]
   Keywords : ;

   Abstract : Macrocoherence is the concept of quantum mechanics being scaled up to the macroscopic level where everyday physical systems should inhibit quantum mechanical properties, however this is not what is observed. Through the use of Leggett-Garg inequalities, one can infer if there is a fundamental quantum mechanical behavior of the system being observed. READ MORE