Quantum mechanics (QM – also known as quantum physics, or quantum theory) is a branch of physics which deals with physical phenomena at microscopic scales, where the action is on the order of the Planck constant. Quantum mechanics departs from classical mechanics primarily at the quantum realm of atomic and subatomic length scales.

Now start with old quantum mechanics books, not very similar to modern physics, but absolutely necessary if you want to understand WHY did we go the way we went. At this point you actually know something about QM and you are ready to learn the Dirac principles and finally destroy every concept about the reality you had before starting this path.

But in quantum physics, usually even for simple problems I can get stuck or don't know where to start. I want to rebuild my knowledge from a new source. The literature I've used so far is: Introduction to Quantum Mechanics by David J.Griffiths, Quantum physics by Leonard Schiff, Modern Quantum Mechanics (Revised Edition) by J.J.Sakurai.

Partial differential equations Spherical polar coordinates (used a lot in atomic & nuclear physics) Special functions (e.g. Legendre polynomials and related functions) Complex analysis (particularly the calculus of residues - i.e complex integration) Green's functions Fourier analysis Group theory A good familiarity with classical analytical ...

2021年8月31日 · State in quantum mechanics. Perhaps the best way to intuit what the quantum state is is to consider how it connects to observable quantities. In quantum mechanics, measurement is probabilistic and the probability distribution over outcomes of a measurement is constructed from two ingredients:

Now coherence in quantum mechanics is due to the nature of the wave functions, which describe the underlying stratum of particles and molecules. These are sinusoidal functions which means they not only have an amplitude ( a measure) but also a phase.

2015年10月4日 · The contrary is not true. Yes, this answer does not exclude some underlying deterministic process, but it excludes randomness as defined for errors and standard deviations. It has been found that probabilistic quantum mechanics fits the data. Whether the quantum dynamics emerges from underlying determinism is another story. $\endgroup$ –

Quantum Physics: A First Encounter: Interference, Entanglement, and Reality; Six Quantum Pieces: A First Course in Quantum Physics. All three books are modern: instead of stressing (otherwise free) particle(s) in a box and the Bohr's atom, they emphasize one particle interference, entanglement, local realism, quantum teleportation. Dr.

It actually becomes a pure quantum superposition of free photon and excited matter states - with all of the matter in its field of influence being part of the quantum superposition. The one photon's state propagates following Maxwell's equations, and so the Fresnel equations apply perfectly well.

2015年8月16日 · In quantum field theory, the notion of locality may have a different meaning, as pointed out already in a comment. Details: The notions of locality and non-locality in Quantum Mechanics have been originally defined in the context of the EPR controversy between Einstein and Bohr on the phenomenon of quantum entanglement.