I'm really interested in quantum physics and would like to learn more. However, I don't know where to start and in what order I should learn things. So, ideally I'm looking for some sort of roadmap...

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.

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.

The standard undergraduate books on quantum mechanics are not very good in comparison to these, and should not be used. A book which requires minimum of calculus or continuous mathematics is Nielsen & Chuang: "Quantum Computation and Quantum Information" This focuses on modern research, and discrete systems in quantum computation.

2015年8月16日 · Are you talking quantum field theory where there are operator valued fields defined in space and locality is about operators determined by spacelike separated regions commuting. Or nonrelativistic quantum mechanics where the wavefunction is not defined on space (it is defined on configuration space)? Please clarify.

A week ago I asked people on this site what mathematical background was needed for understanding Quantum Physics, and most of you mentioned Linear Algebra, so I decided to conduct a self-study of L...

Indeed, classical mechanics emerge from quantum mechanics. Newton formulated the mechanics as the Newtons laws at first, people only later showed their equivalence to more fundamental laws - the Lagrange principle, Hamilton principle and principle of least action. It is still the same mechanics, but formulated in a more profound way. The quantum mechanics were as well …

There are zero contradictions between quantum mechanics and special relativity; quantum field theory is the framework that unifies them. General relativity also works perfectly well as a low-energy effective quantum field theory. For questions like the low-energy scattering of photons and gravitons, for instance, the Standard Model coupled to general relativity is a perfectly good …

Here FQ F Q is the quantum force, which consists of the usual classical force plus a purely quantum term which is function of the so-called quantum potential Q Q. If Newtonian mechanics is invalid in quantum world, what is the guarantee that Quantum mechanics is …

2021年8月31日 · Second, we can use a state to predict the outcomes of observations. This general picture applies to classical mechanics, thermodynamics, chemistry, control theory, software engineering, quantum mechanics etc. State in quantum mechanics Perhaps the best way to intuit what the quantum state is is to consider how it connects to observable quantities.