Quantum Physics Forum

Post thread
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.

Quantum Interpretations and Foundations

How valid is the indivisible interpretation of quantum mechanics?
1.3K threads
Graduate How valid is the indivisible interpretation of quantum mechanics?
Graduate Vector field vs. four scalar fields ("QFT and the SM", Schwartz)
  • Hill
  • · Replies 10 ·
Replies
10
Graduate Fisher information from likelihood function for quantum circuits
  • Johny Boy
  • · Replies 0 ·
Replies
0
Undergrad Why do orthogonal polarizers at slits eliminate interference pattern?
  • ChadGPT
  • · Replies 28 ·
Replies
28
Undergrad Is conservation of energy a local law in Quantum field theory?
  • KleinMoretti
  • · Replies 18 ·
Replies
18
Undergrad Why is there no single slit interference when one slit is closed in a double slit experiment?
  • elou
  • · Replies 55 ·
2
Replies
55
Graduate Does Matter Really Move Like a Wave and Hit Like a Particle?
  • elou
  • · Replies 4 ·
Replies
4
Undergrad How does a band pass filter increase the time of arrival of photons?
  • Daniel Petka
  • · Replies 2 ·
Replies
2
Undergrad Is the uncertainty principle applicable to single slit diffraction?
  • greypilgrim
  • · Replies 2 ·
Replies
2
Graduate How was the symmetry used here? ("QFT and the SM" by Schwartz)
  • Hill
  • · Replies 5 ·
Replies
5
Undergrad Are vacuum energy and vacuum fluctuations the same thing?
  • KleinMoretti
  • · Replies 1 ·
Replies
1
Undergrad Can a Third Particle Be Entangled with Two Existing Particles Without Breaking Their Entanglement?
  • wnvl2
  • · Replies 10 ·
Replies
10
Undergrad Heisenberg Equations of Motion for Electron in EM-field
  • thatboi
  • · Replies 9 ·
Replies
9
Graduate Derivation of energy-momentum tensor in "QFT and the SM" by Schwartz
  • Hill
  • · Replies 3 ·
Replies
3
Graduate Derivation of QM limit of QFT in "QFT and the SM" by Schwartz
  • Hill
  • · Replies 2 ·
Replies
2
Undergrad Speed of information in a medium
  • neobaud
  • · Replies 38 ·
2
Replies
38
High School How addition of vectors works if every force is quantized
  • danielhaish
  • · Replies 20 ·
Replies
20
Graduate What does lambda in nuclear decay mean if it is big?
  • Tibetan Blackbird
  • · Replies 3 ·
Replies
3
Undergrad Tunneling of light through thin metal films
  • Dale
  • · Replies 12 ·
Replies
12
Undergrad Electron wave addition using phasor diagram
  • jjson775
  • · Replies 8 ·
Replies
8
High School Is it possible to find the energy level of a hydrogen atom in this way?
  • hongseok
  • · Replies 4 ·
Replies
4
Undergrad Robertson uncertainty relation for the angular momentum components
  • Yan Campo
  • · Replies 2 ·
Replies
2
Undergrad Is the Vacuum Energy Density Sign Correct for Bosons?
  • gerald V
  • · Replies 3 ·
Replies
3
Undergrad Constant phase factors in wavefunctions
  • Ibix
  • · Replies 5 ·
Replies
5
Undergrad How Does a Qubit Exist as Both 1 and 0 Simultaneously?
  • InquiringMind
  • · Replies 2 ·
Replies
2
Undergrad When does the separation of variables work
  • kelly0303
  • · Replies 2 ·
Replies
2
Undergrad I want to expand a Gaussian wavepacket in terms of sines
  • saadhusayn
  • · Replies 2 ·
Replies
2
Undergrad Can a single photon of a single frequency pass through a FP cavity?
  • Daniel Petka
  • · Replies 29 ·
Replies
29
Undergrad How Do You Compute the Density Matrix of a Bipartite State?
  • Rayan
  • · Replies 2 ·
Replies
2
Undergrad Noether's Theorem in the Presence of a Charged Operator
  • thatboi
  • · Replies 1 ·
Replies
1
Undergrad The lore on complex probabilities
  • arivero
  • · Replies 4 ·
Replies
4
Undergrad Derivation of normal Zeeman-Effect
  • PhysicsRock
  • · Replies 5 ·
Replies
5
Undergrad Is a Time Rotation Operator Analogous to Spatial Rotations Possible?
  • member 743765
  • · Replies 2 ·
Replies
2
Undergrad Electromagnetic radiation, photons, quantized energy levels
  • asf33
  • · Replies 1 ·
Replies
1
Undergrad Are All Photons Truly Virtual?
  • Hill
  • · Replies 6 ·
Replies
6
Undergrad The classical concept of work in a QCD context?
  • walkeraj
  • · Replies 2 ·
Replies
2
Undergrad Virtuals particles, vacuum and infinite energy
  • Donut
  • · Replies 5 ·
Replies
5
Undergrad The theory on the effects of polarizers on particles wavefunctions
  • tade
  • · Replies 6 ·
Replies
6
Undergrad TISE solutions should be combinations-of-eigenstates, why this is not?
  • JackeTheDog132
  • · Replies 3 ·
Replies
3
Undergrad Is this a valid quantum Cheshire cat?
  • pines-demon
  • · Replies 13 ·
Replies
13
Undergrad Spin state, base transformation
  • usai
  • · Replies 3 ·
Replies
3
Graduate Question on Zeno time derivation
  • Mainframes
  • · Replies 4 ·
Replies
4
Graduate Dimensions: Emergent from the Big Bang?
  • Eric Singer
  • · Replies 19 ·
Replies
19
Graduate Question about a research result: Feedback on whether the result is publishable
  • Mainframes
  • · Replies 1 ·
Replies
1
Undergrad Basic question about Bra-Ket notation
  • nomadreid
  • · Replies 17 ·
Replies
17
High School Entanglement & Superposition Probabilities
  • bulx
  • · Replies 27 ·
Replies
27
High School How are the spins of two entangled photons measured at light speed?
  • Walrus
  • · Replies 6 ·
Replies
6
Graduate Can wave particle dualism be replaced by a monistic model?
  • breakwater
  • · Replies 2 ·
Replies
2
Undergrad Very basic questions about operators in QM
  • olgerm
  • · Replies 31 ·
2
Replies
31
Undergrad Why don't we bury Schrodinger's Cat?
  • bushmonk
  • · Replies 143 ·
5
Replies
143
Undergrad Coefficients in the Schrodinger equation and the momentum operator
  • Shen712
  • · Replies 7 ·
Replies
7
Undergrad A probability of field amplitude in QFT
  • MichPod
  • · Replies 23 ·
Replies
23
Graduate What happens when entangled photons are split into different paths?
  • JamesPaylow
  • · Replies 41 ·
2
Replies
41
High School Antiparticles moving opposite direction in time?
  • rolnor
  • · Replies 2 ·
Replies
2
Undergrad Double slit experiment with observer
  • DoofWarrior
  • · Replies 14 ·
Replies
14
Undergrad Understanding the Derivation of the Ginzburg Criterion for the Ising Model
  • thatboi
  • · Replies 1 ·
Replies
1
High School Are Schrodinger's cat and the double slit experiment the same idea?
  • vadadagon
  • · Replies 42 ·
2
Replies
42
High School Schrödingers cat, is it just mumbo-jumbo?
  • rolnor
  • · Replies 39 ·
2
Replies
39
Graduate Relationship between bare and renormalized beta functions
  • Siupa
  • · Replies 2 ·
Replies
2
Undergrad Normalization of wave functions
  • Nana113
  • · Replies 3 ·
Replies
3
Undergrad Is the photon field a vector field and a gauge field?
  • syfry
  • · Replies 6 ·
Replies
6
Graduate Quantitative description of successive Stern-Gerlach measurements
  • Garlic
  • · Replies 1 ·
Replies
1
Undergrad Most Likely Position of an Electron
  • bob012345
  • · Replies 30 ·
2
Replies
30
Undergrad Commutators, operators and eigenvalues
  • dyn
  • · Replies 7 ·
Replies
7
Undergrad How non-conscious can an Observer be and cause wave function collapse?
  • pholmes
  • · Replies 23 ·
Replies
23
High School Is the Born rule truly independent from other postulates in quantum mechanics?
  • SCHROEDERFPM
  • · Replies 26 ·
Replies
26
Graduate Don't understand equation with overleftrightarrow symbol
  • joneall
  • · Replies 10 ·
Replies
10
High School Quantum Physics Can Explain Earth’s Weather
  • bhobba
  • · Replies 20 ·
Replies
20
Graduate Can particles appear and disappear "with" a cause?
  • zaramahdi
  • · Replies 1 ·
Replies
1
High School Lifespan of a Photon: Debunking the Myth of Time Travel
  • rolnor
  • · Replies 33 ·
2
Replies
33
Undergrad Why must the state transformation be unitary?
  • eoghan
  • · Replies 7 ·
Replies
7
Undergrad What is the Uncertainty in the Total Weight of a Collection of Similar Items?
  • JT Smith
  • · Replies 12 ·
Replies
12
Undergrad The Delayed Choice experiment: Is Photon speed important?
  • rolnor
  • · Replies 15 ·
Replies
15
High School Does the Wavefunction of an Electron Collapse When Captured by a Proton?
  • syfry
  • · Replies 13 ·
Replies
13
Undergrad The electron is not point-like?
  • birdhouse
  • · Replies 21 ·
Replies
21
Undergrad I cannot normalise this: F= Cexp(-r/a)
  • jqmhelios
  • · Replies 10 ·
Replies
10
Undergrad Question about Photons causing Electron Transitions in Atoms
  • Joe Prendergast
  • · Replies 20 ·
Replies
20
High School Question about double-slit experiment
  • Jason Ko
  • · Replies 7 ·
Replies
7
Undergrad Understanding Ground State Degeneracy in the Transverse Ising Model
  • thatboi
  • · Replies 0 ·
Replies
0
Graduate Feynman loop diagrams and Dyson series for anomalous magnetic moment
  • Adrian59
  • · Replies 80 ·
3
Replies
80
Graduate Photon Bouncing during APD Dead Time in Autocorrelation Measurement
  • Theo2907
  • · Replies 1 ·
Replies
1
Graduate Time crystals: They require energy added back into them?
  • LightningInAJar
  • · Replies 10 ·
Replies
10
Graduate Understanding Ghost Fields in QED: Eliminating Unphysical Degrees of Freedom"
  • The Tortoise-Man
  • · Replies 9 ·
Replies
9
Undergrad The last step of this Green's function proof is not clear
  • Hill
  • · Replies 7 ·
Replies
7
Undergrad Intersection of Condensed Matter Theory + High Energy Physics
  • thatboi
  • · Replies 0 ·
Replies
0
Undergrad Fine Structure Constant - 10 steps
  • Garry Goodwin
  • · Replies 4 ·
Replies
4
Graduate Does the Zeno effect freeze all the commuting observables?
  • Heidi
  • · Replies 1 ·
Replies
1
Graduate How Does Position Interact with Spin Angular Momentum in Quantum Mechanics?
  • dnl914
  • · Replies 2 ·
Replies
2
Graduate Question about commutator involving fermions and Pauli matrices
  • Gleeson
  • · Replies 1 ·
Replies
1
Undergrad Correlation Matrix of Quadratic Hamiltonian
  • thatboi
  • · Replies 1 ·
Replies
1
Undergrad When do classical mechanics and electromagnetics stop working?
  • jmheer
  • · Replies 8 ·
Replies
8
Graduate Problem evaluating an anticommutator in supersymmetric quantum mechanics
  • Gleeson
  • · Replies 3 ·
Replies
3
Undergrad Photoelectric effect and Saturation Current
  • fog37
  • · Replies 12 ·
Replies
12
Undergrad What makes up the bare mass of elementary particles?
  • timmdeeg
  • · Replies 3 ·
Replies
3
Undergrad Question about the Photoelectric Effect and the Work Function of a Metal
  • ParsaEF
  • · Replies 5 ·
Replies
5
Undergrad Looking for resources to learn bra-ket notation
  • zoltrix
  • · Replies 3 ·
Replies
3
Undergrad Looking For Help Understanding Bell's Theorem, Hidden Variables & QM
  • Lynch101
  • · Replies 80 ·
3
Replies
80
Graduate First Order in Time Derivatives + Phase Space
  • thatboi
  • · Replies 1 ·
Replies
1
High School Definition of a random variable in quantum mechanics?
  • Aidyan
  • · Replies 12 ·
Replies
12
Undergrad Hall Conductivity and Rotational Invariance
  • thatboi
  • · Replies 1 ·
Replies
1
Graduate Are there any hypercomplex time values?
  • DyerMaker
  • · Replies 8 ·
Replies
8