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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

Particle vs Wave Interpretations of QM

1.3K threads22 minutes ago

Undergrad Particle vs Wave Interpretations of QM

22 minutes ago

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Graduate Starting with the Schrodinger equation, how do we find the Hamiltonian matrix?

lavinia
Apr 15, 2010 · Replies 11 · May 13, 2019

Replies: 11

Undergrad Can Compton scattering increase the energy of photons?

jim421616
May 12, 2019 · Replies 1 · May 12, 2019

Replies: 1

Graduate I am Imran, a retired Electrical Engineer with a QM question

ImranM098
May 10, 2019 · Replies 1 · May 11, 2019

Replies: 1

Graduate Charged particle on a sphere with magnetic dipole at its center

ShayanJ
Aug 4, 2014 · Replies 2 · May 10, 2019

Replies: 2

High School Can Molecules Have Defined Position and Momentum Before Measurement?

name123
May 8, 2019 · Replies 17 · May 9, 2019

Replies: 17

Undergrad Why Is My Fourier Transform of a Gaussian Incorrect?

jaurandt
May 8, 2019 · Replies 4 · May 9, 2019

Replies: 4

Graduate Flexibility in Grover's Algorithm?

.Scott
Sep 26, 2013 · Replies 2 · May 8, 2019

Replies: 2

Graduate Field screening in the electron

Pythagorean
Feb 23, 2008 · Replies 2 · May 8, 2019

Replies: 2

Graduate What is the hardware for quantum gates?

nomadreid
Feb 21, 2010 · Replies 4 · May 8, 2019

Replies: 4

Graduate Bra-ket notation to Matrix for entangled pairs

nomadreid
May 5, 2012 · Replies 3 · May 8, 2019

Replies: 3

Graduate Where does photon interference happen

zonde
May 26, 2011 · Replies 2 · May 8, 2019

Replies: 2

Graduate Classical versus quantum information

nomadreid
Jun 17, 2013 · Replies 2 · May 7, 2019

Replies: 2

Graduate Rigorous treatments of double-slit , quantum eraser, etc.

strangerep
Jan 18, 2011 · Replies 2 · May 7, 2019

Replies: 2

Graduate Probability current proportional to density

Peeter
May 13, 2009 · Replies 3 · May 7, 2019

Replies: 3

Graduate Heisenberg-Robertson uncertainty relation vs. noise-disturbance measures

vanhees71
Jan 18, 2013 · Replies 2 · May 7, 2019

Replies: 2

Graduate Examining Coherent States: a|0⟩=0|0⟩=0

LagrangeEuler
Apr 26, 2019 · Replies 27 · May 7, 2019

Replies: 27

Undergrad What is passive locality ? Bell's Theorem.

harrylin
Apr 27, 2011 · Replies 2 · May 7, 2019

Replies: 2

Graduate Radiation of an accelerated charge

fluidistic
Oct 8, 2010 · Replies 2 · May 7, 2019

Replies: 2

Graduate Probabilities & Observed Reality

StevieTNZ
Sep 17, 2011 · Replies 1 · May 7, 2019

Replies: 1

Graduate Is Eventum Mechanics the Same as CSL?

atyy
Aug 1, 2014 · Replies 1 · May 7, 2019

Replies: 1

Graduate How to Measure Entangled Photons in the 45/135 Basis with Wave Plates and PBS?

StevieTNZ
Jun 5, 2012 · Replies 1 · May 7, 2019

Replies: 1

Graduate Disturb a complex massive field, apply force ?

Spinnor
Apr 22, 2012 · Replies 1 · May 7, 2019

Replies: 1

Graduate What is entanglement purification and how does it work?

StevieTNZ
Mar 29, 2012 · Replies 1 · May 7, 2019

Replies: 1

Graduate Number of Photons In Each Section

StevieTNZ
Aug 15, 2011 · Replies 1 · May 7, 2019

Replies: 1

Graduate Peculiarities of photons in quantum optics

Cthugha
Dec 20, 2012 · Replies 1 · May 7, 2019

Replies: 1

Graduate Adroit Measurements in Reaching Conclusion

StevieTNZ
Mar 22, 2011 · Replies 1 · May 7, 2019

Replies: 1

Graduate Two complex fields + interaction, conserved current?

Spinnor
Dec 4, 2010 · Replies 1 · May 7, 2019

Replies: 1

Graduate How to graph Dirac equation, some complex numbers?

Spinnor
Jun 16, 2012 · Replies 1 · May 7, 2019

Replies: 1

Graduate Macroscopic quantum effects and gravitational wave detector

Truecrimson
Nov 1, 2009 · Replies 1 · May 7, 2019

Replies: 1

Graduate What Happens to Entangled Photons at a Beam Splitter?

StevieTNZ
Sep 4, 2012 · Replies 1 · May 7, 2019

Replies: 1

Graduate Bruce Rosenblum, author of Quantum Enigma

StevieTNZ
Nov 25, 2010 · Replies 1 · May 7, 2019

Replies: 1

Graduate How Do Wave Plates Influence Photon Entanglement and Measurement?

StevieTNZ
Jan 26, 2012 · Replies 1 · May 7, 2019

Replies: 1

Graduate Evolution of Photons from Bell-States to Separable States

StevieTNZ
Apr 26, 2012 · Replies 1 · May 7, 2019

Replies: 1

Graduate Collapse Models of Quantum Mechanics

StevieTNZ
Jan 12, 2012 · Replies 1 · May 7, 2019

Replies: 1

Graduate Pilot wave without non-locality

zonde
Aug 13, 2010 · Replies 1 · May 7, 2019

Replies: 1

Graduate Quantum Teleportation / Beam Splitters

StevieTNZ
Apr 4, 2012 · Replies 1 · May 7, 2019

Replies: 1

Graduate How Is Mass Generated Dynamically in Quantum Field Theory?

marlon
Jul 24, 2004 · Replies 1 · May 7, 2019

Replies: 1

Graduate 3D phase space of point particle and spinors.

Spinnor
Jun 18, 2009 · Replies 1 · May 7, 2019

Replies: 1

Graduate Majorana equation in Algebra of Physical Space

Jonathan Scott
Jul 26, 2009 · Replies 1 · May 7, 2019

Replies: 1

Graduate Can this classical double-slit experiment duplicate loss of interference?

JesseM
Oct 21, 2011 · Replies 1 · May 7, 2019

Replies: 1

Graduate Question about quantum statistical mechanics and thermodynamic arrow of time

JesseM
Jan 6, 2005 · Replies 1 · May 7, 2019

Replies: 1

Graduate Shape-Invariant Potentials in N=2 SUSY QM

quantumdude
Apr 15, 2007 · Replies 1 · May 7, 2019

Replies: 1

Undergrad Clarification of the Pauli exclusion princple

HomogenousCow
May 7, 2019 · Replies 11 · May 7, 2019

Replies: 11

Undergrad Why does the Dirac equation lead to spin 1/2?

Vampyr
May 2, 2019 · Replies 8 · May 6, 2019

Replies: 8

Undergrad Complete list of Feynman diagrams

friend
Dec 31, 2018 · Replies 3 · May 6, 2019

Replies: 3

Graduate What is a 'Quantum Coherence'?

TimWilliams87
May 5, 2019 · Replies 2 · May 5, 2019

Replies: 2

Graduate Path Integral QM: Intro and Forward/Backward Scattering

grzz
Jul 5, 2011 · Replies 1 · May 5, 2019

Replies: 1

High School Bohr's duality paradox 100 years later?

skewzme
Apr 24, 2019 · Replies 71 · May 5, 2019

3

Replies: 71

Graduate Possible similarity between Classical and Quantum photon definition

DaTario
Feb 3, 2010 · Replies 1 · May 4, 2019

Replies: 1

Undergrad Vector Notation of Quantum States for 2 Qubit System

MrMuscle
May 4, 2019 · Replies 2 · May 4, 2019

Replies: 2

Undergrad Pauli exclusion principle and Hermitian operators

jlcd
May 2, 2019 · Replies 15 · May 3, 2019

Replies: 15

Graduate Do QED effects make a huge change to the position of the electrons?

Ali Lavasani
May 1, 2019 · Replies 20 · May 2, 2019

Replies: 20

Undergrad Unveiling the Mystery of Entangled Particle Spin

remormalise
Mar 25, 2019 · Replies 11 · May 2, 2019

Replies: 11

Graduate One Loop Correction to a 4 pt. function in 3 dimensions

QFT1995
Apr 27, 2019 · Replies 5 · May 2, 2019

Replies: 5

Undergrad Expectation value of the occupation number in the FD and BE distributions

Lebnm
Apr 21, 2019 · Replies 1 · May 2, 2019

Replies: 1

Graduate Discrete K-G eq. solutions - problem with integral

weirdoguy
Jan 29, 2019 · Replies 2 · May 2, 2019

Replies: 2

Undergrad What Are the Key Properties and Measurements of Pauli Matrices?

QuasarBoy543298
May 2, 2019 · Replies 1 · May 2, 2019

Replies: 1

Undergrad Could the probability distribution itself be quantised?

Robert Webb
May 1, 2019 · Replies 1 · May 1, 2019

Replies: 1

High School Can Electrical Repulsion Distort Electron Orbits in Atoms?

arupel
Apr 28, 2019 · Replies 3 · May 1, 2019

Replies: 3

High School Do Entangled Photons React to possible Photon-Photon Collisions?

Joseph1785
Apr 30, 2019 · Replies 4 · Apr 30, 2019

Replies: 4

Graduate Why is Spin-Orbit Coupling Important in Understanding Quantum Systems?

oddiseas
May 30, 2010 · Replies 1 · Apr 30, 2019

Replies: 1

Graduate Transition in LS-coupling confusion

joris_pixie
May 31, 2012 · Replies 1 · Apr 30, 2019

Replies: 1

Graduate Alternative linear comb. to vizualize hydrogenic orbitals p,d etc

psand
Jul 17, 2009 · Replies 1 · Apr 30, 2019

Replies: 1

Graduate Solutions to the TISE for unbound states

trelek2
Feb 28, 2009 · Replies 1 · Apr 30, 2019

Replies: 1

Graduate Molecular States, Symmetry and Allowed Transitions

tomothy
Dec 14, 2013 · Replies 1 · Apr 30, 2019

Replies: 1

Undergrad How to understand the Bloch sphere in the quantum computation?

Haorong Wu
Apr 30, 2019 · Replies 2 · Apr 30, 2019

Replies: 2

Graduate Query about an article on quantum synchronization

Danny Boy
Apr 30, 2019 · Replies 1 · Apr 30, 2019

Replies: 1

Undergrad Hamiltonian in QM for QFT forces/fields effects

jlcd
Apr 28, 2019 · Replies 26 · Apr 29, 2019

Replies: 26

Undergrad Kim's 1999 delayed-choice quantum eraser experiment

skewzme
Apr 26, 2019 · Replies 23 · Apr 29, 2019

Replies: 23

Graduate Does there exist a super-quantum correlation in mixed-state formalism

jk22
Apr 27, 2019 · Replies 3 · Apr 29, 2019

Replies: 3

Graduate Which operator corresponds to the Green function in QFT?

jordi
Apr 25, 2019 · Replies 11 · Apr 29, 2019

Replies: 11

Graduate What is the relationship between QFT and QM?

jordi
Apr 27, 2019 · Replies 34 · Apr 29, 2019

2

Replies: 34

Graduate Why "Green's function" is used more than "correlations" in QFT?

jordi
Apr 27, 2019 · Replies 5 · Apr 28, 2019

Replies: 5

Graduate No hidden variables in QM - a paradigm shift?

Pleonasm
Apr 27, 2019 · Replies 5 · Apr 28, 2019

Replies: 5

Undergrad Eigenstates and repeated measurements

jlcd
Apr 25, 2019 · Replies 5 · Apr 27, 2019

Replies: 5

Graduate How does Bell's 1964 theorem address detector independence and local realism?

Dfpolis
Apr 26, 2019 · Replies 18 · Apr 27, 2019

Replies: 18

High School What Is the Role of Density Matrices in Describing Quantum Mixtures?

jk22
Apr 26, 2019 · Replies 4 · Apr 27, 2019

Replies: 4

Graduate The line between quantum and large scale objects

bassplayer142
Oct 13, 2008 · Replies 1 · Apr 27, 2019

Replies: 1

High School Proietti 2019 experiment: Doubt in measuring A1(B1)

Joao
Apr 21, 2019 · Replies 1 · Apr 26, 2019

Replies: 1

High School Can superposition be attained for multiple states at once?

Grinkle
Apr 26, 2019 · Replies 3 · Apr 26, 2019

Replies: 3

Graduate Second Quantized Minimal Basis Hamiltonian of H2

Physics Learner
Jan 25, 2019 · Replies 1 · Apr 26, 2019

Replies: 1

Graduate Is there a principle of stationary action for QFT?

jordi
Apr 25, 2019 · Replies 8 · Apr 26, 2019

Replies: 8

Graduate Do we need stochasticity in a discrete spacetime?

Ali Lavasani
Apr 25, 2019 · Replies 2 · Apr 25, 2019

Replies: 2

Graduate Can we create a random variable using QED effects?

Ali Lavasani
Apr 21, 2019 · Replies 25 · Apr 25, 2019

Replies: 25

Undergrad Does the Compton wavelength put a limitation on position measurements?

Ali Lavasani
Apr 25, 2019 · Replies 5 · Apr 25, 2019

Replies: 5

Graduate How to mathematically write down a probability of measuring a particle

fluidistic
Apr 25, 2019 · Replies 1 · Apr 25, 2019

Replies: 1

Undergrad Would these (unrealistic) conditions imply gravitons existed?

NotASmurf
Apr 25, 2019 · Replies 3 · Apr 25, 2019

Replies: 3

Graduate Calculating transition rate between nljm resolved states

Khashishi
Jun 13, 2013 · Replies 1 · Apr 25, 2019

Replies: 1

Graduate Help with quantum computing notation

Joao
Jan 22, 2019 · Replies 1 · Apr 25, 2019

Replies: 1

Graduate Regarding the Born approximation

Kontilera
Feb 5, 2013 · Replies 1 · Apr 25, 2019

Replies: 1

Graduate What is the relationship between angular momentum and energy in electrons?

DiracPool
Jan 17, 2013 · Replies 1 · Apr 25, 2019

Replies: 1

Graduate Photons interacting with multiple matter particles

muppet
Sep 10, 2014 · Replies 1 · Apr 25, 2019

Replies: 1

Graduate Water molecule absorbing radiation (or not?)

mikeph
Jul 5, 2012 · Replies 1 · Apr 25, 2019

Replies: 1

Graduate Matriz Lz, m=2, but in x,y,z basis

alejandrito29
Apr 6, 2014 · Replies 1 · Apr 25, 2019

Replies: 1

Graduate Rayleigh Ritz with two Particles

wduff
Mar 18, 2011 · Replies 1 · Apr 25, 2019

Replies: 1

High School Is this a good way of "dumbing down" superposition?

Bianca Meske
Apr 22, 2019 · Replies 2 · Apr 24, 2019

Replies: 2

Graduate Why Are My Tensor Products Not Adding Up Correctly?

Jim Kata
Aug 27, 2011 · Replies 1 · Apr 24, 2019

Replies: 1

Graduate Feynman Double-Slit: 2nd Slit Effects Explored

decoherent
Jul 2, 2009 · Replies 1 · Apr 24, 2019

Replies: 1

Graduate Rearranging the doulbe slit experiement?

jimjones
Jun 18, 2010 · Replies 1 · Apr 24, 2019

Replies: 1

High School Variations of the Double Slit?

skewzme
Apr 22, 2019 · Replies 30 · Apr 24, 2019

2

Replies: 30

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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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