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

Undergrad Valid local explanation of Bell violations? (Pegg et al., 1999; 2008)
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
High School Is this article's reliability questionable?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Is the Wheeler-DeWitt equation somehow related to the Multiverse?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Matrix Representation of an Operator (from Sakurai)
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Questions about an optical photon quantum computer
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Neutron Star Cores: Study Quantum Gravity Effects?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad What is the current experimental evidence for quantum trajectory theory?
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad Born's rule, causality, and the Dirac equation
  • · Replies 17 ·
Replies
17
Views
3K
High School The Cat's Perspective: Can Macroscopic Bodies Be in Superposition?
  • · Replies 46 ·
2
Replies
46
Views
6K
Undergrad Notation for vectors in tensor product space
  • · Replies 17 ·
Replies
17
Views
3K
High School Cherenkov radiation double slit experiment
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Measurement with respect to the observable Y
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad In quantum search algorithm, how to interpret the effect of U(t)？
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Objective Wave Function and Non-locality
  • · Replies 33 ·
2
Replies
33
Views
2K
Undergrad Quantum Gravimeter: Exploiting the Born rule
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad How to Determine a Photon's Wavefunction After it Collapses?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate What quantum effects that involve gravity can be studied without QFT?
  • · Replies 5 ·
Replies
5
Views
1K
Graduate Jürg Fröhlich on the deeper meaning of Quantum Mechanics
  • · Replies 230 ·
8
Replies
230
Views
20K
Graduate Random Quantum Walk: Learn & Use w/ Quantum Gates
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Request for a clarification about the Ward identity
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Some questions in QFT (EM vertex, Ward identity, etc.)
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Quantum Computing - projection operators
  • · Replies 16 ·
Replies
16
Views
3K
High School From where did the ##ie\gamma## come into the picture? (QED)
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Recent paper on QED using finite-dimensional Hilbert space - validity?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Is the Wheeler-DeWitt equation related to Wheeler's It from Bit?
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Impact of atmospheric turbulence on secret key rate in QKD
  • · Replies 2 ·
Replies
2
Views
2K
High School Quantum Entanglement Violates the Laws of Physics
  • · Replies 3 ·
Replies
3
Views
1K
High School Probability of finding a particle
  • · Replies 10 ·
Replies
10
Views
3K
Undergrad Would this experiment disprove that consciousness causes collapse?
  • · Replies 35 ·
2
Replies
35
Views
5K
High School General form of electromagnetic vertex function in QFT
  • · Replies 1 ·
Replies
1
Views
2K
Graduate What topics in Quantum Gravity don't require QFT or string theory?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad How Does Quantum Field Theory Address Zeno's Paradox of Touch?
  • · Replies 5 ·
Replies
5
Views
1K
How Does Qubit Orientation on the Bloch Sphere Indicate Quantum States?
  • · Replies 2 ·
Replies
2
Views
4K
High School Shrødinger equation & electrons jumping between atoms
  • · Replies 4 ·
Replies
4
Views
1K
Graduate What is the relationship between MHD waves and the Korteweg de Vries equation?
  • · Replies 1 ·
Replies
1
Views
731
Graduate The Higgs Field, constant velocity, and the acceleration of particles
  • · Replies 1 ·
Replies
1
Views
1K
High School Quantum Wave & Principle of Least Action
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Question about a passage in Blundell's QFT
  • · Replies 2 ·
Replies
2
Views
1K
High School Entanglement when I "produce" positron-electron pairs one at a time
  • · Replies 46 ·
2
Replies
46
Views
5K
Undergrad Confusion with Dirac notation in the eigenvalue problem
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Rabi frequency and "optical resonance and two level atoms" by Allen
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad Planck had 2 definitions of energy in 1900, how?
  • · Replies 1 ·
Replies
1
Views
1K
High School How do you find the Lagrangians for different fields?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad One vertex interactions in QED - error in the book?
  • · Replies 4 ·
Replies
4
Views
2K
High School Understanding Quantum: The Particle/Number Duality
  • · Replies 8 ·
Replies
8
Views
2K
High School Exploring the Nature of Photons: Position, Speed, and Emission/Absorption
  • · Replies 2 ·
Replies
2
Views
1K
High School Quantum theory for high-school students
  • · Replies 77 ·
3
Replies
77
Views
12K
Graduate Uncertainty vs Randomness in Quantum Physics
  • · Replies 16 ·
Replies
16
Views
3K
Undergrad A bar magnet and magnetic moment in a magnetic field
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Quantum Mechanics, The Delta-Function potential
  • · Replies 8 ·
Replies
8
Views
2K
High School Clarification of Notation - Fourier decomposition of fields in QFT
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Is the holographic principle based on fuzzy logic?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Operations regarding tensor-product states
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Numerical solution to the Schrodinger eqn. using Finite Difference Method
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Doubt about a time convolution master equation
  • · Replies 1 ·
Replies
1
Views
987
Graduate Golden ratio fractal phase conjugation
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Hund's rules and Pauli's principle
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad How can laser detuning excite an atom?
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Why do we know that an elementary particle is a point particle?
  • · Replies 30 ·
2
Replies
30
Views
4K
Undergrad Particle in free space - what happens to the wave function after measurement?
  • · Replies 2 ·
Replies
2
Views
2K
What are the units of the radial wavefunction in my FORTRAN code?
  • · Replies 1 ·
Replies
1
Views
3K
Time Evolution of a Square Pulse - Fourier
  • · Replies 1 ·
Replies
1
Views
5K
Undergrad Is this a new theory, an enhanced theory or just philosophy?
  • · Replies 31 ·
2
Replies
31
Views
4K
Undergrad Quantum Jumps and Schrodinger's Cat are predictable
  • · Replies 79 ·
3
Replies
79
Views
11K
High School Photon exchange in molecular bonds
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad What is the true state of a particle in superposition?
  • · Replies 10 ·
Replies
10
Views
1K
Graduate Is the wavefunction subjective? How?
  • · Replies 128 ·
5
Replies
128
Views
14K
Undergrad Can Brain Responses to Quantum Signals Determine True Quantum Interpretation?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Do spin operators 'appear' to commute for an entangled spin state?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Is there a procedure for designing some quantum circuits?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Uncertainty Principle in the context of tracking particle paths
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Communicating Via Quantum Entanglement Using Time Differentiated Pulse
  • · Replies 24 ·
Replies
24
Views
2K
Graduate Can the Huygens-Fresnel principle be translated into path integrals?
  • · Replies 14 ·
Replies
14
Views
3K
Undergrad The Philosophy of Quantum Mechanics
  • · Replies 23 ·
Replies
23
Views
3K
Undergrad Role of mass and quantum gravitational effects in friction?
  • · Replies 4 ·
Replies
4
Views
1K
Graduate Observables when the symmetry is not broken?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Is the Basis in Quantum Physics a Fundamental Property of Objects?
  • · Replies 15 ·
Replies
15
Views
2K
Undergrad Why Would Observation Change Anything Physically?
  • · Replies 24 ·
Replies
24
Views
2K
Undergrad Question About The Role of Observation in Quantum Mechanics
  • · Replies 36 ·
2
Replies
36
Views
4K
Insights Vacuum Fluctuations in Experimental Practice - Comments
  • · Replies 41 ·
2
Replies
41
Views
7K
Graduate On the Planck Blackbody Function
  • · Replies 16 ·
Replies
16
Views
3K
Undergrad Classicality and the Correspondence Principle
  • · Replies 63 ·
3
Replies
63
Views
5K
Undergrad Value of beta in Boltzmann Statistics taking degeneracy into account
  • · Replies 19 ·
Replies
19
Views
3K
Undergrad How to know where the up and down spin go in the wavefunction?
  • · Replies 1 ·
Replies
1
Views
982
Graduate What is the significance of nonlocality super-activation in this paper?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Does this hint of entanglement within protons suggest new physics?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad The information paradox and non-locality, ER = EPR
  • · Replies 6 ·
Replies
6
Views
3K
Graduate What it is the internal space?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Someone observing Wigner and his friend
  • · Replies 20 ·
Replies
20
Views
3K
High School Phase shift in Mach-Zehnder interferometer
  • · Replies 5 ·
Replies
5
Views
4K
Undergrad Can You Help Me Couple 3 Spin 1/2 Particles?
  • · Replies 3 ·
Replies
3
Views
2K