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Quantum Physics Forum

Join in expert discussion on quantum physics. Quantum physics is the mathematical description of the motion and interaction of subatomic particles. Quantum Mechanics and Field Theory.

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Quantum Interpretations and Foundations

Entanglement swapping and Bohmian mechanics

1.3K threads2 minutes ago

Graduate Entanglement swapping and Bohmian mechanics

2 minutes ago

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Graduate Recovering QM from QFT: David Tong Notes

victorvmotti
Dec 13, 2015 · Replies 1 · Dec 18, 2015

Replies: 1

Graduate Distinguishability of electrons in an atom

Ananthan9470
Oct 8, 2015 · Replies 7 · Dec 18, 2015

Replies: 7

Graduate Conceptual questions on unitarity and time evolution

"Don't panic!"
Dec 18, 2015 · Replies 4 · Dec 18, 2015

Replies: 4

Graduate Pairs of observables in uncertainty principle

Negatratoron
Dec 18, 2015 · Replies 1 · Dec 18, 2015

Replies: 1

Graduate What effect would one expect if the Critical Temperature is

thanasis
Dec 18, 2015 · Replies 5 · Dec 18, 2015

Replies: 5

Undergrad Why aren't we on maverick branches?

Quantumental
Dec 17, 2015 · Replies 3 · Dec 18, 2015

Replies: 3

Graduate Can temperature affect the absorption and emission ranges of atomic spectra?

jerromyjon
Dec 13, 2015 · Replies 8 · Dec 17, 2015

Replies: 8

Graduate I would like to learn about the string theory.

Fuinne
Dec 16, 2015 · Replies 4 · Dec 17, 2015

Replies: 4

Graduate Propagator of inverse harmonic oscillator

sadegh4137
Dec 17, 2015 · Replies 1 · Dec 17, 2015

Replies: 1

Graduate Error in Srednicki renormalization?

Higgsy
Dec 16, 2015 · Replies 2 · Dec 16, 2015

Replies: 2

Graduate From how far away is radiated energy of photons effective?

windowofhope
Dec 16, 2015 · Replies 1 · Dec 16, 2015

Replies: 1

Graduate Wave equation indicates the probability density

Small bugs
Dec 15, 2015 · Replies 17 · Dec 16, 2015

Replies: 17

Graduate Intuition for divergences in sunset diagram

Higgsy
Dec 15, 2015 · Replies 1 · Dec 16, 2015

Replies: 1

Graduate Why does the depolarising channel include Tr[X] in its definition?

aaaa202
Dec 10, 2015 · Replies 1 · Dec 15, 2015

Replies: 1

Graduate Prove the nth Hermite polynomial has n real zeros

Happiness
Dec 15, 2015 · Replies 1 · Dec 15, 2015

Replies: 1

Graduate Decoherence in the long time limit of density matrix element

soviet1100
Dec 15, 2015 · Replies 5 · Dec 15, 2015

Replies: 5

Graduate Relationship between Quantum Numbers and Quantum Information

kalimaa
Dec 11, 2015 · Replies 5 · Dec 15, 2015

Replies: 5

Graduate How did Bell and Zeilinger attempt to rule out hidden variables?

thinkandmull
Dec 8, 2015 · Replies 22 · Dec 15, 2015

Replies: 22

Graduate How Do You Construct Excited States in a Two-Boson Harmonic Oscillator?

kuy
Dec 13, 2015 · Replies 8 · Dec 15, 2015

Replies: 8

Graduate Is there a Bell type inequality involving only three values?

Zafa Pi
Dec 7, 2015 · Replies 11 · Dec 15, 2015

Replies: 11

Graduate Trace Distance in quantum mechanics

Emil_M
Dec 5, 2015 · Replies 1 · Dec 14, 2015

Replies: 1

Graduate Are photons really anti-correlated off their basis vectors?

zincshow
Dec 14, 2015 · Replies 2 · Dec 14, 2015

Replies: 2

Insights A Hand-Wavy Discussion of the Planck Length - Comments

klotza
Sep 9, 2015 · Replies 28 · Dec 14, 2015

Replies: 28

Graduate Realism and counterfactual definiteness in Bell's theorem

ShayanJ
Dec 13, 2015 · Replies 10 · Dec 14, 2015

Replies: 10

Graduate The spectral gap and it's decidability

#neutrino
Dec 14, 2015 · Replies 1 · Dec 14, 2015

Replies: 1

Graduate Question related to a 3D finite spherical well

ClaireBear1596
Dec 13, 2015 · Replies 2 · Dec 13, 2015

Replies: 2

Graduate Why is Quantum Mechanics Inherently Probabilistic?

AlexGLSY
Dec 13, 2015 · Replies 5 · Dec 13, 2015

Replies: 5

Graduate Why does gauge fixing break gauge symmetry?

TimeRip496
Jul 7, 2015 · Replies 3 · Dec 13, 2015

Replies: 3

Graduate Distance between positron and electron

Einstein's Cat
Dec 6, 2015 · Replies 5 · Dec 13, 2015

Replies: 5

Graduate What is the relationship between frequency and energy in matter waves?

VHAHAHA
Mar 2, 2013 · Replies 7 · Dec 13, 2015

Replies: 7

Undergrad Parallel universes and randomness

HydroTekZ
Dec 13, 2015 · Replies 1 · Dec 13, 2015

Replies: 1

Graduate Wave-function solution of a rectangular-well potential

Happiness
Dec 12, 2015 · Replies 4 · Dec 13, 2015

Replies: 4

Graduate Ground-state energy of harmonic oscillator(operator method)

explainplease
Dec 12, 2015 · Replies 9 · Dec 12, 2015

Replies: 9

Graduate Quantum effects caused by our mathematics?

ande4jo
Nov 30, 2015 · Replies 28 · Dec 12, 2015

Replies: 28

Graduate How does wave function collapse affect measurements taken after measurements?

klw289
Nov 29, 2015 · Replies 70 · Dec 12, 2015

3

Replies: 70

Graduate Resources for quantum mechanics experiments with textbook topics

TomServo
Dec 11, 2015 · Replies 1 · Dec 12, 2015

Replies: 1

Graduate How can pure EM waves experience decoherence?

jlcd
Dec 11, 2015 · Replies 11 · Dec 12, 2015

Replies: 11

Graduate Counting States of Degeneracy in 3-D Particles in a Box

Sturk200
Dec 11, 2015 · Replies 1 · Dec 11, 2015

Replies: 1

Graduate Is Fokker Planck equation equivalent to Schrodinger equation

naima
Dec 11, 2015 · Replies 1 · Dec 11, 2015

Replies: 1

Graduate Is the Spectral Gap Problem in Quantum Mechanics Undecidable?

andresB
Dec 11, 2015 · Replies 1 · Dec 11, 2015

Replies: 1

Graduate Experiment showing energy levels of light are quantized

conquest
Dec 10, 2015 · Replies 6 · Dec 11, 2015

Replies: 6

Undergrad Must even functions have even number of nodes?

Happiness
Dec 9, 2015 · Replies 21 · Dec 11, 2015

Replies: 21

Graduate Finding minimum CHSH value in hidden variable model

jk22
Nov 29, 2015 · Replies 19 · Dec 11, 2015

Replies: 19

Graduate Isn't Schrodinger's cat doomed anyways?

Bharath Siva
Dec 10, 2015 · Replies 5 · Dec 10, 2015

Replies: 5

Graduate Why are Dirac adjoints and imaginary terms in Feynman propagators?

Immortalis
Dec 9, 2015 · Replies 4 · Dec 10, 2015

Replies: 4

Graduate Why Do Some Particles Decay Faster Than Others?

Ryan Reed
Aug 7, 2015 · Replies 6 · Dec 10, 2015

Replies: 6

Undergrad What is the explanation for quantum correlations?

bremsstrahlung
Dec 10, 2015 · Replies 23 · Dec 10, 2015

Replies: 23

Graduate Are Some Atomic Orbitals From a 4D Wave Function?

Hornbein
Dec 9, 2015 · Replies 3 · Dec 10, 2015

Replies: 3

Graduate Electromagnetic waves and the correspondence principle

center o bass
Sep 12, 2014 · Replies 4 · Dec 10, 2015

Replies: 4

Graduate Do QED and wave interference both explain thin film patterns?

Jimmy87
Jun 15, 2013 · Replies 9 · Dec 9, 2015

Replies: 9

Graduate How does the wavefunction "know" the observables?

Coherence
Dec 8, 2015 · Replies 12 · Dec 9, 2015

Replies: 12

Graduate Perceived contradiction in non-locality principle

entropy1
Dec 3, 2015 · Replies 61 · Dec 9, 2015

3

Replies: 61

Graduate Why is the transition in resistance gradual at the Critical Temperature

thanasis
Dec 6, 2015 · Replies 4 · Dec 9, 2015

Replies: 4

Graduate Possible explanation for a Bell experiment?

PR0
Dec 4, 2015 · Replies 21 · Dec 9, 2015

Replies: 21

Graduate 100% transmission through a potential barrier

Happiness
Dec 8, 2015 · Replies 1 · Dec 8, 2015

Replies: 1

Graduate What are some coincidences in quantum mechanics that make life possible?

tzimie
Dec 7, 2015 · Replies 12 · Dec 8, 2015

Replies: 12

Graduate What determines light-matter interaction processes?

carllacan
Dec 8, 2015 · Replies 3 · Dec 8, 2015

Replies: 3

Graduate Is the collapse of a wave function deterministic or random?

Happiness
Dec 7, 2015 · Replies 30 · Dec 8, 2015

2

Replies: 30

Graduate QED explanation of entanglement

zonde
Nov 30, 2015 · Replies 13 · Dec 8, 2015

Replies: 13

Graduate How to get from the wavefunction to weighted states?

Jarrodmccarthy
Dec 8, 2015 · Replies 1 · Dec 8, 2015

Replies: 1

Graduate What experiments justified Einstein Podolsky Rosen's notion of entanglement?

ontodva
Dec 7, 2015 · Replies 7 · Dec 8, 2015

Replies: 7

Graduate Do Electrons need Energy to Excite the EM field?

Ryan Reed
Dec 3, 2015 · Replies 3 · Dec 8, 2015

Replies: 3

Graduate Free particle with smooth compact support wavefunction

Kostik
Dec 6, 2015 · Replies 5 · Dec 7, 2015

Replies: 5

Graduate Why doesn't color superposition make blue quarks attracted to color-neutral hadrons?

BiGyElLoWhAt
Dec 5, 2015 · Replies 17 · Dec 7, 2015

Replies: 17

Graduate Unitary and linear operator in quantum mechanics

spaghetti3451
Dec 6, 2015 · Replies 3 · Dec 7, 2015

Replies: 3

Undergrad What exactly does quantum entanglement imply?

Daniel K
Dec 1, 2015 · Replies 78 · Dec 7, 2015

3

Replies: 78

Graduate Must the 1st derivative of phi be undetermined at V=infinity

Happiness
Dec 7, 2015 · Replies 4 · Dec 7, 2015

Replies: 4

Graduate Commutation relations for angular momentum operator

spaghetti3451
Dec 6, 2015 · Replies 7 · Dec 6, 2015

Replies: 7

Graduate What is the difference between psi(x;y) and psi(x) in 2D BO

sztld123
Dec 5, 2015 · Replies 1 · Dec 6, 2015

Replies: 1

Graduate Can synchronization emulate non-locality ?

Mentz114
Dec 5, 2015 · Replies 11 · Dec 6, 2015

Replies: 11

Graduate Anderson localization and electron flow/diffusion?

jarekduda
Nov 30, 2015 · Replies 1 · Dec 6, 2015

Replies: 1

Graduate Eberhard assumptions and FTL communication

zonde
Dec 5, 2015 · Replies 4 · Dec 5, 2015

Replies: 4

Graduate Bell-state entanglement swapping and retrocausality

entropy1
Nov 28, 2015 · Replies 24 · Dec 5, 2015

Replies: 24

Graduate Schwarz-Hora effect publications

HeinrichHora
Jul 9, 2013 · Replies 1 · Dec 5, 2015

Replies: 1

Graduate Double-slit with semi-transparence

Pizza
Dec 1, 2015 · Replies 6 · Dec 5, 2015

Replies: 6

Graduate Are photons passing a polarization filter randomly?

entropy1
Dec 4, 2015 · Replies 7 · Dec 4, 2015

Replies: 7

Graduate Why do Planck's constant and action have the same units?

Mercy
Dec 4, 2015 · Replies 11 · Dec 4, 2015

Replies: 11

Graduate Quantum Cosmology and Quantum Computing

Alexis1304
Dec 4, 2015 · Replies 6 · Dec 4, 2015

Replies: 6

Graduate Retrieving information from qubits

T S Bailey
Dec 3, 2015 · Replies 4 · Dec 4, 2015

Replies: 4

Graduate Stern-Gerlach experiment with x, y, and z axes

Hornbein
Dec 4, 2015 · Replies 1 · Dec 4, 2015

Replies: 1

Graduate Hyperfine structure in hydrogen

victorvmotti
Dec 3, 2015 · Replies 1 · Dec 4, 2015

Replies: 1

High School Is there proof that photons actually exist?

entropy1
Dec 4, 2015 · Replies 8 · Dec 4, 2015

Replies: 8

Graduate Double-slit with half-transparent mirror

jk22
Dec 2, 2015 · Replies 11 · Dec 4, 2015

Replies: 11

Graduate Do Electrons Excite the EMF or do the Virtual Photons?

Ryan Reed
Dec 3, 2015 · Replies 1 · Dec 4, 2015

Replies: 1

Graduate CPT transformation analogue of free electron laser?

jarekduda
Dec 3, 2015 · Replies 2 · Dec 4, 2015

Replies: 2

Graduate Seeking a phase angle operator for the QHO

snoopies622
Nov 29, 2015 · Replies 3 · Dec 3, 2015

Replies: 3

Graduate Are the two paths in an interferometer indistinguishable?

Happiness
Dec 3, 2015 · Replies 1 · Dec 3, 2015

Replies: 1

Graduate Wave function -- Why is there an imaginary part?

preitiey
Dec 1, 2015 · Replies 5 · Dec 3, 2015

Replies: 5

Graduate Pilot wave theory and quantum tunneling

johnob
Dec 2, 2015 · Replies 4 · Dec 3, 2015

Replies: 4

Undergrad Why does the double slit experiment outcome change only with observation?

nnope
Nov 25, 2015 · Replies 49 · Dec 2, 2015

2

Replies: 49

Graduate Can an operator map an eigenstate to a different eigenstate?

Adel Makram
Dec 1, 2015 · Replies 9 · Dec 2, 2015

Replies: 9

Graduate How to interpret Bell's theorem correctly

entropy1
Dec 2, 2015 · Replies 2 · Dec 2, 2015

Replies: 2

High School Diffraction of light, the mechanism

Raymond Potvin
Dec 1, 2015 · Replies 19 · Dec 2, 2015

Replies: 19

Graduate Nonlinear susceptibility in second harmonic generation

Konte
Nov 27, 2015 · Replies 15 · Dec 2, 2015

Replies: 15

Graduate Hidden variables and Bell's inequality

Point Conception
Nov 23, 2015 · Replies 12 · Dec 2, 2015

Replies: 12

Graduate Double slit experiment exposed?

Nav
Sep 9, 2015 · Replies 22 · Dec 1, 2015

Replies: 22

Graduate Exact Description of Properties: Spin, etc.

abrogard
Nov 30, 2015 · Replies 3 · Dec 1, 2015

Replies: 3

Graduate Wave Functions: What Are They?

Negatratoron
Nov 29, 2015 · Replies 8 · Dec 1, 2015

Replies: 8

Graduate Correspondence principle and its use

janko78
Nov 22, 2015 · Replies 3 · Dec 1, 2015

Replies: 3

Graduate Uncertainty principle at the macroscopic level

preitiey
Dec 1, 2015 · Replies 8 · Dec 1, 2015

Replies: 8

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Quantum Physics

Quantum physics, or quantum mechanics, is a branch of physics that explores the behavior of matter and energy at the smallest scales, where classical physics principles break down. It introduces the concept of quantization, suggesting that certain properties, such as energy levels, are quantized and can only exist in discrete values.

Quantum mechanics encompasses wave-particle duality, where particles like electrons exhibit both wave and particle characteristics. The theory is probabilistic, relying on probability amplitudes to predict outcomes, and features phenomena like superposition, where particles can exist in multiple states simultaneously.

Quantum physics has transformed our understanding of the microscopic world, leading to technologies like transistors and lasers, and continues to provoke profound questions about the nature of reality and the role of observation in shaping it.

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