# quantum physics

Greg Bernhardt submitted a new PF Insights post Interview with Astrophysicist: Adam Becker [ATTACH] Continue reading the Original PF Insights Post.
Thread by: Greg Bernhardt, Mar 24, 2018, 129 replies, in forum: Quantum Physics

### B Explanation of Quantum Entanglement Please

Hello, I am 12 years old in 6th grade and love physics and Quantum Physics, I would love an explanation of Quantum Physics and Topological Quantum...
Thread by: Arik Salehi, Mar 7, 2018, 4 replies, in forum: Quantum Physics

### A Why do space translations satisfy the Wigner's Theorem?

Some books argue that typical coordinate transformations such as space translations and rotations are represented in quantum mechanics by unitary...
Thread by: NessunDorma, Dec 28, 2017, 7 replies, in forum: Quantum Physics

### B Planck-Einstein relation and the Photoelectric Effect

Hi everyone, I just have some confusion regarding Planck's and Einstein's equation. The following is an explanation of the photoelectric effect...
Thread by: Abu, Dec 16, 2017, 3 replies, in forum: Quantum Physics

### Derive the relation between the P & R branches

Hi, I have an assignment to derive the two following expressions: R(J)-P(J)=2B'(2J+1) R(J-1)-P(J+1)=2B''(2J+1) where Bis the rotational constant...
Thread by: Bananen, Dec 4, 2017, 2 replies, in forum: Advanced Physics Homework

### B Quantum Teleportation Question from a Curious 10 year old

I am doing a GT project for elementary school. The questions I have to ask are not too complicated, and I only have 2 questions. I know that...
Thread by: Jacques Marrot, Dec 1, 2017, 14 replies, in forum: Quantum Physics

### How can i start in quantum physics and quantum mechanics?

i want an article or video that i can start with at the journy of understanding the basics of quantum physics and quantum mechanics i don't want...
Thread by: mr1batman, Nov 4, 2017, 10 replies, in forum: Academic Guidance

### Point me in the right direction -- Quantum Physics learning resources

I am trying to learn all about Quantum Physics on my own but I am struggling to find credible sources of information. As you are probably aware...
Thread by: nnope, Oct 7, 2017, 9 replies, in forum: Academic Guidance

### B Entanglement, what is it?

I dont have much of a background in quantum physics so be patient with my questions please. Basically I want to know how does entanglement...
Thread by: nnope, Oct 1, 2017, 79 replies, in forum: Quantum Physics

### A Observable particles as asymptotic states...

I've read Arnold Neumaier's excellent Insight article on virtual particles, but I'm very confused about one thing: Observable particles are...
Thread by: asimov42, Sep 20, 2017, 47 replies, in forum: Quantum Physics

### A ‘Transverse Field Ising Spin’-compatible Super Hamiltonian

Is it possible to create a ‘Transverse Field Ising Spin’-compatible Super Hamiltonian? I want to apply the Super Hamiltonian to this paper:...
Thread by: ProgrammingGodJordan, Sep 8, 2017, 2 replies, in forum: Quantum Physics

### B Does this theorem “theoretically” falsify macrorealism?

Hello! Recently I found this article: http://quantum-journal.org/papers/q-2017-07-14-13/pdf/ Being familiar with some basis of quantum...
Thread by: Daria K, Aug 19, 2017, 3 replies, in forum: Quantum Physics

### I Does the wave function shorten when approaching light speed?

Relative to the observer, objects shorten when approaching the speed of light exponentially. Does this rule also apply to the wave function? Does...
Thread by: KBon, Aug 8, 2017, 2 replies, in forum: Quantum Physics

### B Are there Hadrons with more than three quarks?

As far as I know there are Mesons (quark-Antiquark pair) and Baryons (three quarks). But are there Hadrons which contain more than 3 Quarks?
Thread by: KBon, Aug 3, 2017, 8 replies, in forum: High Energy, Nuclear, Particle Physics

### B What is an electrostatic/Coulomb barrier? How is it created?

I learned that for nuclear fusion to take place, particles must overcome the electrostatic field but what exactly is it? And how is it created/formed?
Thread by: smartypants123, Aug 2, 2017, 4 replies, in forum: General Physics

### B The first light atomic nucleus with a second face

The first light atomic nucleus with a second face Physicist found the first light atomic nucleus in a lab that had too little resources....
Thread by: FL0R1, Jul 23, 2017, 1 replies, in forum: Atomic and Condensed Matter

### A Generalizing distinguishability of photons on HOM dip?

Hello all. I am trying to determine what is the effect of having photons that are distinguishable undergoing a quantum interference process. To do...
Thread by: Cleber, Jul 14, 2017, 2 replies, in forum: Quantum Physics

### I Calculate the energy of the electron in a non-H like atom

Hello mates. I was doing some research about Rydberg atoms, and I came up with this question: what's the energy of an electron in n energy level...
Thread by: jorgeha, Jun 27, 2017, 6 replies, in forum: Quantum Physics

### Filmmaker/Artist/Quantum Physics/Physics/Cosmology/Parent

Hello folks. This thread is open for discussion among those who want to explore the similarities between the experiential principles found in art...
Thread by: lorysnark, Jun 6, 2017, 2 replies, in forum: New Member Introductions

### I Transition state of electrons in molecules

Hi ! In my class we have an exercise that I technically understand but that I can't get conceptually. We have trois molecules (naphtalene,...
Thread by: goldenboy, May 24, 2017, 8 replies, in forum: Quantum Physics

### B Double Slit Experiment: Detection around slit?

Dear All, I have a question on the double slit experiment. From the references I've read so far, they are focusing on the results of the detector...
Thread by: Andy_K, May 18, 2017, 4 replies, in forum: Quantum Physics

### I Can an Atom Become a Black Hole?

If you shrunk an atom down to a certain point would it become a black hole like all matter in the universe can? How big would it be?
Thread by: Blop, May 17, 2017, 5 replies, in forum: General Physics
I am looking for a derivation of the following formula  \eta=\lim_{\omega\rightarrow0} \frac{1}{2\omega}\int dt...