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

Graduate Understanding Barandes' microscopic theory of causality
Undergrad Confusion with superposition of states
  • · Replies 2 ·
Replies
2
Views
1K
Graduate How Does Quantum Field Theory Preserve Causality?
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Equation for levitation forces between the magnets and superconductor
  • · Replies 10 ·
Replies
10
Views
2K
Graduate Understanding time invariant of EM
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Force on Photon? Interaction with Matter Explained
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad Spooky action at a distance by electrons?
  • · Replies 19 ·
Replies
19
Views
2K
Undergrad How does the von Neumann equation relate to Schrödinger's equation?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Why we need completeness of eigenfuntions for QM to be internally consistent?
  • · Replies 13 ·
Replies
13
Views
2K
High School Is Born's Rule Commutative in Quantum State Measurements?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Confusion about factoring in quantum computation
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Preferred orientation of a nitrogen molecule in space?
  • · Replies 24 ·
Replies
24
Views
2K
High School Questions on QFT & QM: Is QM or QFT Absolute Time?
  • · Replies 69 ·
3
Replies
69
Views
7K
Undergrad Photon states and interference in an Interferometer
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Would distinguishable particles experience bonding?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Clebsch-Gordan coefficients and their sign
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Wave function when there is coupling between spin and position
  • · Replies 3 ·
Replies
3
Views
1K
High School Quarks and Antiquarks in a baryon
  • · Replies 5 ·
Replies
5
Views
1K
High School Can a Quark Tunnel Out of a Proton?
  • · Replies 6 ·
Replies
6
Views
1K
Undergrad How to be sure we have found all magnetic quantum numbers?
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad How to choose the way an excited electron loses energy?
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad Is the Born Rule Derivable from Other Postulates in Quantum Mechanics?
  • · Replies 17 ·
Replies
17
Views
4K
Undergrad Spherical Symmetry & Electron Spin: An Exploration
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Excited electrons' behaviour, how do they work?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Why does an electron orbital have a preferred z axis?
  • · Replies 53 ·
2
Replies
53
Views
5K
High School Is a Universe Without Parallel Universes Possible in the Multiverse Theory?
  • · Replies 12 ·
Replies
12
Views
2K
High School Might all physical quantities be quantized?
  • · Replies 6 ·
Replies
6
Views
8K
Undergrad Double Slit Experiment question
  • · Replies 9 ·
Replies
9
Views
2K
Graduate How can we derive the results that we know about QM from QED?
  • · Replies 22 ·
Replies
22
Views
4K
High School IB Physics Extended Essay - Quantum Levitation
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad How electrons absorb or emit photons
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Does a Gaussian wave packet remain Gaussian?
  • · Replies 5 ·
Replies
5
Views
1K
Graduate QED Bound States: Weinberg's Explanation & Breakdown
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Electric dipole moment of the nucleus of an atom
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Are time and space continuous or discrete?
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Voltage between electron and proton in ground state hydrogen atom?
  • · Replies 26 ·
Replies
26
Views
5K
High School What Are Quantum Fields and How Do They Relate to Particles?
  • · Replies 19 ·
Replies
19
Views
2K
High School I formulating a research question for my Extended Essay
  • · Replies 3 ·
Replies
3
Views
2K
High School Confusion over spin measurements
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad What is a Photon? - Physics Basics Explained
  • · Replies 95 ·
4
Replies
95
Views
17K
Graduate Is quantum theory a microscopic theory?
  • · Replies 232 ·
8
Replies
232
Views
22K
High School Speed of light with quantum path integrals
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Representation of Super-Quantum probability
  • · Replies 1 ·
Replies
1
Views
824
Undergrad Wave-particle duality revisited: Neither wave nor particle
  • · Replies 3 ·
Replies
3
Views
2K
High School Quantum microphone and phonons
  • · Replies 5 ·
Replies
5
Views
1K
High School The Human Eye as a Detector in Double-Slit Experiment
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad God plays dice, stochastically and deterministically.
  • · Replies 1 ·
Replies
1
Views
1K
High School QFT & QM Questions (about time, locality, gravity, etc.)
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Can you locally tell that a measurement you made was entangled?
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Multiplying two function operators
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Standard deviation of the Hamiltonian?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Matrix transmission coefficient
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Is the Quantum State Holographic?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Does science disprove this person's theory?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Dirac's Gamma Matrices: What Are They & Do They Have Many Forms?
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Why observables are represented as operators in QM?
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Is the Measurement Apparatus made up partly of electrons? Perhaps not.
  • · Replies 36 ·
2
Replies
36
Views
3K
High School What am I missing here? (QFT: ##e^- - p## scattering)
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Banning the terms "realist" & "anti-realist" -- do you agree?
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad What is the Meaning of the Schrödinger Equation?
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Isn't the local no-hidden-variable theory inconsistent with standard QM?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Problem with the idea of identical particles in QM
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Where to publicise some notes on quantum mechanics
  • · Replies 21 ·
Replies
21
Views
3K
Undergrad Interacting fields in QFT and minimum excitations....
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Trying to understand entanglement and "dense coding"
  • · Replies 2 ·
Replies
2
Views
1K
Graduate What is the difference between quantum computers and quantum accelerators?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate How can infrared divergences in the fermion propagator be cured in QED?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Understanding Operators in Matrix Mechanics
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Spot Electron: Unveiling the Wave-Function Collapse
  • · Replies 1 ·
Replies
1
Views
1K
Graduate What does the first ever photo of quantum entanglement look like?
  • · Replies 16 ·
Replies
16
Views
3K
Undergrad Momentum operator in quantum mechanics
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Trying to understand electron orbitals
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Is time irrelevant in quantum mechanics?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad What does U\dagger H U represent?
  • · Replies 2 ·
Replies
2
Views
2K
High School FTL Communication: Closing Bell Test Loopholes for Quantum Integrity
  • · Replies 19 ·
Replies
19
Views
3K
Undergrad Let's talk about the classical limit of QM
  • · Replies 13 ·
Replies
13
Views
3K
Undergrad How to use a quantum bit, or several
  • · Replies 1 ·
Replies
1
Views
840
Undergrad Solving for hbar: Momentum and Wave Vector Relationship
  • · Replies 16 ·
Replies
16
Views
4K
Undergrad Can ambiguity in the word "measurement" allow contradictions in QM?
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad Finding Normalization Constants for a Set of Energy Eigenstates
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Tensor and vector product for Quantum
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Replace a Toffoli gate with an equivalent circuit
  • · Replies 2 ·
Replies
2
Views
2K
High School Multiple Histories theory by Richard Feynman
  • · Replies 10 ·
Replies
10
Views
5K
High School Can quantum entangled particles be split and sent into a black hole
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Relativistic Quantum Mechanics & Localized Particles
  • · Replies 61 ·
3
Replies
61
Views
7K
Graduate How does a polarising filter work?
  • · Replies 13 ·
Replies
13
Views
2K
Graduate Correlation function of a Klein-Gordon field
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad What Is the Mystery Behind Particle Spin and Bell's Inequality?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Young physicist in seek of guidance
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Viewing the wave properties of a macroscopic object
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad When exactly did 'quantum fluctuations' in the early universe occur?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad What is the range of natural photon frequencies?
  • · Replies 6 ·
Replies
6
Views
1K
Undergrad In which cases does superposition lead to splitting of worlds?
  • · Replies 16 ·
Replies
16
Views
2K
Undergrad Quantum Causal Modelling: Mathematics
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Why are there so few experiments in the foundation of physics? Or am I wrong?
  • · Replies 25 ·
Replies
25
Views
3K
Undergrad Can we truly ignore the existence of quantum objects between measurements?
  • · Replies 6 ·
Replies
6
Views
1K
Graduate [Quantum Optics] "quantumness"
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Any EM-field in terms of photon
  • · Replies 35 ·
2
Replies
35
Views
4K
Insights How Does the EPR-Paradox Relate to Entanglement and Nonlocality?
  • · Replies 12 ·
Replies
12
Views
3K
High School How does the Higgs field “Give mass”?
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Is Quantum Information Theory the Only Way to Handle Multipartite Entanglement?
  • · Replies 1 ·
Replies
1
Views
1K