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Quantum Interpretations and Foundations

Particle vs Wave Interpretations of QM
1.3K threads
Undergrad Particle vs Wave Interpretations of QM
Undergrad Why is BBO the most used crystal for second-order nonlinear optics?
  • James2018
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High School QM randomness vs chaotic determinism?
  • lukephysics
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Undergrad Energy Non-Conservation in Quantum Mechanics
  • Coelum
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Undergrad Delayed choice quantum eraser setup with no beam splitter
  • Athraxin
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Undergrad How to prove that the L and S (of the total angular momentum commute?
  • Heidi
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High School Particle Movement in Quantum Mechanics
  • Islam Hassan
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Undergrad HUP for spin seems violated: 0 x sy > sz/2...?
  • JBlue
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Undergrad On a constructive method of quantum state preparation (Ballentine)
  • EE18
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Undergrad Trying to understand why electrons fill orbitals the way they do
  • physicurious
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10
High School Is there a probability in QM that an event happens at time t?
  • Heidi
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Undergrad General argument that entanglement can only be created locally
  • greypilgrim
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Undergrad What role does Quantum Mechanics play in a internal combustion engine?
  • obbeel
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High School Gravitrons vs Photons: how come light and gravity exist?
  • Any name will do
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Graduate In light of new evidence, what might be behind the Casimir Effect?
  • peterbb
  • · Replies 46 ·
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Undergrad What Is Bell's Theorem and Why Does It Matter?
  • golya
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Graduate Confused about going from relativistic to non-relativistic Hamilonian
  • Malamala
  • · Replies 1 ·
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Undergrad Solutions of the Bloch equations for MRT
  • Derbyshire
  • · Replies 6 ·
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6
High School The nature of anti-particles and anti-matter (a dilettante asks)
  • Any name will do
  • · Replies 8 ·
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Graduate Is the Fractional Quantum Hall Effect an emergent property?
  • Cato
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4
Undergrad How exactly does spooky action at a distance violate SRT?
  • greypilgrim
  • · Replies 18 ·
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Graduate K-point mesh and Monkhorst-Pack
  • ramana3797
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Graduate How can a 'Principle' produce a 'Force'?
  • sophiecentaur
  • · Replies 12 ·
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12
Graduate Method for delaying photon 140ms+ while maintaining entanglement?
  • criquant
  • · Replies 7 ·
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7
Undergrad Spontaneous Symmetry Breaking and quantum mechanics
  • arivero
  • · Replies 15 ·
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15
Undergrad Phenomena: Recent + Documented
  • Immer Tzaddi
  • · Replies 1 ·
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Graduate Importance of Densities in QFT
  • physwiz222
  • · Replies 1 ·
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Graduate Two Slit Interference Experiment Variations
  • Chas Tennis
  • · Replies 4 ·
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High School Double slit experiment, expensive gear?
  • rolnor
  • · Replies 49 ·
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Undergrad What does ## \psi^{*}\hat{H}\psi ## mean?
  • ConjugatedClanger
  • · Replies 9 ·
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9
Undergrad Can We Accurately Measure Momentum in the Lab?
  • dsaun777
  • · Replies 20 ·
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High School Extremely elementary questions about QM
  • okaythanksbud
  • · Replies 24 ·
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Graduate QFT S-matrix explanations are incomprehensible
  • jostpuur
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2
Graduate What exactly does 'Locality' in Gauge Theory mean?
  • The Tortoise-Man
  • · Replies 5 ·
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5
Graduate Potential between Photons via Delbruck Scattering
  • DuckAmuck
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5
Graduate What is the geometry of a gauge potential in the A-B experiment?
  • Anko
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High School Light, Photons, Waves, Particles: Wave-Particle Duality....
  • ISamson
  • · Replies 17 ·
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Undergrad Double slit as a function of time
  • dom_quixote
  • · Replies 9 ·
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9
Graduate Proving BF action is a difference of Chern-Simons actions
  • StarWombat
  • · Replies 0 ·
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Undergrad Some questions about this vintage periodic table
  • jmatt
  • · Replies 10 ·
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10
High School What happens to excess energy when an electron gets excited by light?
  • Richard2001
  • · Replies 7 ·
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Graduate How to derive the quantum detailed balance condition?
  • lsdragon
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Undergrad Can anyone explain me this quantum entanglement experiment
  • James2018
  • · Replies 4 ·
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4
Graduate Why does the description of a composite system involve a tensor product?
  • prabin
  • · Replies 2 ·
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Graduate Ground state calculation with a time averaged wave function
  • hilbert2
  • · Replies 2 ·
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Undergrad Photon Entanglement: Identifying & Using an Entangled Pair
  • RobbyQ
  • · Replies 4 ·
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Undergrad Confusion Regarding a Spectral Decomposition
  • ARoyC
  • · Replies 6 ·
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6
Undergrad Can we now explain the Fine Structure Constant?
  • RobbyQ
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5
Undergrad Do EM waves have negative frequency inside negative-index materials?
  • jeast
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4
Undergrad How can I model squeezed states in 3D optical modelling software?
  • Sciencemaster
  • · Replies 1 ·
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Undergrad Confusions I have regarding Measurements in Quantum Mechanics
  • ARoyC
  • · Replies 11 ·
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11
Undergrad How Do Gauge and Phase Symmetries Differ in Quantum Systems?
  • DrDu
  • · Replies 6 ·
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High School Interferometry: Photons Needed for Interference Pattern
  • Bob8102
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Graduate Anti-symmetric tensor question
  • DuckAmuck
  • · Replies 6 ·
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Undergrad Where do the vibrational modes of molecules come from?
  • asphy
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Undergrad How is the Schrodinger equation related to the Heisenberg equation?
  • Thamyres MARTINS
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Graduate Why Can't I Derive Eq.(7) from Phys.Lett.B Vol.755?
  • PRB147
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Undergrad Is photon energy negative in a negative-index metamaterial?
  • jeast
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Undergrad Force carrier particle trajectories and warped spacetime
  • jaketodd
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2
Undergrad Do Two Photons in a Radiative Cascade Exhibit Directional Correlation?
  • Clovis
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Undergrad The speed of forces, and applying relativity to force carriers
  • jaketodd
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Undergrad Callan-Symanzik equation for Effective Potential
  • thatboi
  • · Replies 1 ·
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Undergrad Quantum Circuit Confusion On Time Evolution
  • thatboi
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Undergrad Can the Lieb-Robinson Bound be Intuited from the Taylor Series of an Operator?
  • thatboi
  • · Replies 1 ·
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High School What is the nature of de Broglie matter wave? Is it longitudian or transverse?
  • nohtha
  • · Replies 8 ·
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Undergrad Interpreting Unitary Time Evolution
  • thatboi
  • · Replies 10 ·
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10
Undergrad Generating Entangled Electron Pairs
  • RobbyQ
  • · Replies 6 ·
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Undergrad A hurdle in quantum computing I've never been able to figure out
  • jaketodd
  • · Replies 26 ·
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Undergrad Quantum Mechanics vs Einstein: Light Btwn Black Holes, Double Slit Experiment
  • namelessuser
  • · Replies 3 ·
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3
Undergrad Is there a Crookes radiometer device with photoelectric effect?
  • jonjacson
  • · Replies 1 ·
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Undergrad Entanglement may reveal more about black holes? ...Even micro ones!
  • jaketodd
  • · Replies 4 ·
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4
Undergrad What is the limit in size that two particles/objects can be entangled?
  • jaketodd
  • · Replies 5 ·
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5
High School Is it possible to get the photoelectric effect in red color frequency?
  • Renandornelles
  • · Replies 11 ·
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Undergrad Spectroscopy: vibronic and rotational transitions
  • pisluca99
  • · Replies 1 ·
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1
Undergrad Antisymmetrizing a Factorized Polynomial Vanishes?
  • thatboi
  • · Replies 0 ·
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0
Undergrad Is there a generator of entangled photons with fixed polarization?
  • prokopcio
  • · Replies 11 ·
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11
Undergrad Clarification required for some equations in the formulation of ideal Bose gas
  • Wrichik Basu
  • · Replies 2 ·
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2
Graduate Identity with Gamma matrices and four-vector contractions
  • Francisco Alegria
  • · Replies 2 ·
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2
Undergrad Time dependence of operators in the Schrödinger picture
  • The Tortoise-Man
  • · Replies 5 ·
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5
Undergrad Help with a derivation from a paper (diatomic molecular potential)
  • Malamala
  • · Replies 2 ·
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2
Undergrad Singlet Halperin State Construction
  • thatboi
  • · Replies 0 ·
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Undergrad What is a False Vacuum? Understanding its Properties and Energy Differences
  • KurtLudwig
  • · Replies 10 ·
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10
Undergrad Hawking's latest contribution, is this an implication?
  • jaketodd
  • · Replies 10 ·
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10
High School What Distinguishes Wavefunction from Superposition in Photon Behavior?
  • syfry
  • · Replies 27 ·
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27
High School Does Wavelength Affect Uncertainty in Macroscopic Objects?
  • John Constantine
  • · Replies 11 ·
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11
Graduate Number of particles in canonical ensemble
  • Demystifier
  • · Replies 9 ·
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9
Undergrad JC Model in Python: Advice & Feedback Needed - Jon Poplett
  • JonPoplett
  • · Replies 2 ·
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Undergrad Emission Spectrum & Energy: Exciting Hydrogen Vapor
  • pisluca99
  • · Replies 3 ·
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3
Undergrad The Hamiltonian elements in Anderson dimer
  • hokhani
  • · Replies 4 ·
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4
Undergrad Two-photon Stimulated Raman Transitions
  • Nijiro
  • · Replies 2 ·
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2
Graduate What is this unitary invariant?
  • Heidi
  • · Replies 3 ·
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3
Undergrad How Does a Photon Interfere in an Experiment with Less Than One Photon?
  • Grelbr42
  • · Replies 14 ·
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High School Device that detects if someone is looking at the device?
  • Syamsu
  • · Replies 23 ·
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23
Undergrad Instability of hydrogen ground state if the time-reversal operator is unitary
  • ergospherical
  • · Replies 2 ·
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2
High School Examples of less popular pairs of physical properties with uncertainty (HUP)
  • syfry
  • · Replies 12 ·
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12
Graduate Real vs complex spherical harmonics for hexagonal symmetry
  • Junaidjami
  • · Replies 2 ·
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2
Undergrad Hossenfelder: Delayed Choice Quantum Eraser, Debunked?
  • Halc
  • · Replies 3 ·
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3
Undergrad Can Operators Have Multiple Partial Derivatives in Quantum Mechanics?
  • Happiness
  • · Replies 7 ·
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7
Undergrad Fermi energy for a Fermion gas with a multiplicity function ##g_n##
  • phos19
  • · Replies 1 ·
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1
Undergrad Physical meaning of two independent, non-interacting parts
  • vibhuav
  • · Replies 3 ·
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3
Undergrad What do you need to establish that spin is conserved?
  • Old Person
  • · Replies 3 ·
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3