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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 threads
Undergrad Particle vs Wave Interpretations of QM
Undergrad Closure in the subspace of linear combinations of vectors
  • Phys12
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Graduate Number of thermal photons in a real (finite Q) cavity
  • f95toli
  • · Replies 4 ·
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Undergrad Exponential of momenta to entangle harmonic oscillators
  • matteo137
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Undergrad Proof of Commutative Operators for Simultaneous Measurement
  • VVS2000
  • · Replies 14 ·
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Graduate Conservation of angular momentum in positron-electron annihilation
  • Simon Bridge
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3
Graduate Normalization of the radial part of the spherical harmonics
  • Taz
  • · Replies 14 ·
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14
High School Quantum Micro-Blackholes: Fact or Fiction?
  • atommo
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Undergrad Calculate a spin state as a function of the base spin states
  • Luke_Mtt
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Graduate Anyone actively experimenting?
  • Butyln
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7
High School Is diamagnetism only present with varying magnetic fields?
  • jaumzaum
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3
Graduate Resolving the Paradox: Combining Quantum Mechanics and Special Relativity
  • Helena Wells
  • · Replies 10 ·
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10
Undergrad How to determine Spinor in Feynman diagram
  • Markus Kahn
  • · Replies 6 ·
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6
Undergrad Quantum spaces without classical counterparts?
  • Ssnow
  • · Replies 5 ·
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5
High School How Could Quantum Communications Operate at Light Speed Given Relativity?
  • darthgoon
  • · Replies 19 ·
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Undergrad Renormalisation and running of the φ^3 and other coupling constants
  • tomdodd4598
  • · Replies 22 ·
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High School Double Slit Paradox: A Wave-Particle Mystery
  • shlosmem
  • · Replies 13 ·
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High School The nature of orthogonal oscillations (extending E&M)
  • SJMCGOWAN777
  • · Replies 3 ·
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Undergrad Understanding the wrong way to quantize the Dirac Field | Part 1
  • JD_PM
  • · Replies 4 ·
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4
Undergrad Jonsson’s apparatus for photons rather than electrons
  • Phys12
  • · Replies 3 ·
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3
Undergrad What is the nature of the photons?
  • Haorong Wu
  • · Replies 7 ·
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7
Undergrad Prove that the norm squared of a superposition of two states is +ve
  • Phys12
  • · Replies 19 ·
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19
Undergrad Necessity of Quantum Gravity given Planck scales for nuclear physics
  • Phys12
  • · Replies 6 ·
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6
Undergrad Bell's Theorem - why product of (2)spins can be +1 (Griffith's text)
  • Sparky_
  • · Replies 1 ·
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Graduate Is randomness real or the inability to perceive hyper complex order?
  • blazh femur
  • · Replies 16 ·
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Undergrad Solve the particle in a box problem using matrix mechanics?
  • mike1000
  • · Replies 41 ·
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Undergrad Representing Quantum Gates in Tensor Product Space
  • phun_physics
  • · Replies 1 ·
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Graduate Reference frame of the vacuum -- which forum?
  • danb
  • · Replies 21 ·
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21
Undergrad Spin-orbit interaction and two inconsistent values
  • hokhani
  • · Replies 1 ·
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1
Undergrad Photon absorption for an atomic electron
  • Dfault
  • · Replies 47 ·
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Graduate Do bosons contradict basic probability laws?
  • Philip Koeck
  • · Replies 108 ·
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Undergrad What would the world be like if the HUP were not a thing?
  • Souma
  • · Replies 6 ·
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6
Undergrad Can an electron in the 1s orbital be indefinitely far from the nucleus?
  • jaumzaum
  • · Replies 43 ·
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High School Has the Double Slit Experiment been Performed in a Near Vacuum?
  • wolfy
  • · Replies 2 ·
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2
Undergrad Experimental confirmation of the Born rule
  • Dadface
  • · Replies 12 ·
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12
Undergrad The "size" of entangled particles
  • Souma
  • · Replies 18 ·
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18
Undergrad Pair production via Quantum Tunneling has negative Kinetic energy?
  • Superposed_Cat
  • · Replies 3 ·
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3
Undergrad Does quantum theory describe light as a wave?
  • HtimsNats
  • · Replies 7 ·
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7
Undergrad What is the meaning of the mass assigned to an individual quark?
  • Dale
  • · Replies 21 ·
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21
Undergrad Wilson-Sommerfeld quantization to solve square-well potential
  • Robin04
  • · Replies 5 ·
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5
Graduate Eigenstates of ##\phi^4## theory
  • HomogenousCow
  • · Replies 2 ·
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2
Graduate Spin dynamics and the Pauli exclusion principle
  • atomiclaser
  • · Replies 1 ·
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1
Undergrad Meaning of the Orbital Angular Momentum of Super Chiral Light
  • bob012345
  • · Replies 6 ·
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6
Undergrad Hyperfine Splitting: Get Help Understanding It
  • privategenius
  • · Replies 2 ·
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2
Undergrad Physical question about Phonons
  • CGandC
  • · Replies 2 ·
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2
Undergrad Dirac Lagrangian and Covariant derivative
  • PeroK
  • · Replies 14 ·
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14
Graduate Amplitudes for ##\phi^4## theory
  • PeroK
  • · Replies 4 ·
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4
Undergrad Normal order and overlap of states
  • Markus Kahn
  • · Replies 6 ·
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6
Undergrad Can a Hamiltonian with non-spherical potential commute with l^2?
  • Feelingfine
  • · Replies 2 ·
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Graduate QFT question about using momentum raising and lowering operators
  • arnshch
  • · Replies 3 ·
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3
Graduate Functional Determinant of a system of differential operators?
  • Yellotherephysics
  • · Replies 2 ·
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High School Quantum Tunneling different individual transmission probabilities
  • wolfy
  • · Replies 2 ·
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2
Undergrad Spin in Real Space: Meaning of Z-Component
  • hokhani
  • · Replies 7 ·
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Graduate Converting between field operators and harmonic oscillators
  • SupernerdSven
  • · Replies 2 ·
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Undergrad Schrodinger equation on the complex disk
  • Ssnow
  • · Replies 5 ·
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5
Undergrad The wave function in the finite square well
  • Terrycho
  • · Replies 10 ·
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10
Undergrad Understanding the Role of Space Energy Propagator in Quantum Field Theory
  • PeroK
  • · Replies 4 ·
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4
Undergrad On 1/2 spin - which is the X axis?
  • MichPod
  • · Replies 39 ·
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Undergrad Confusion about position state kets
  • Oliver321
  • · Replies 7 ·
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7
Graduate 2-electron system under compression
  • hilbert2
  • · Replies 12 ·
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12
Graduate Absorption of an Exciton and Exciton propagation
  • Sciencestd
  • · Replies 1 ·
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1
Graduate How to calculate the interband velocity matrix in a graphene system
  • Sunny Huang
  • · Replies 1 ·
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Undergrad Quantum operators and trasformation under rotations
  • forever_physicist
  • · Replies 3 ·
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3
Undergrad Explaining atoms and bonding using entropy
  • micklat
  • · Replies 10 ·
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Undergrad Matrix Representations of the Poincare Group
  • cuallito
  • · Replies 4 ·
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4
Graduate Concurrence as a measure of entanglement
  • LagrangeEuler
  • · Replies 1 ·
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Undergrad Using general relativity to violate the uncertainty principle
  • Souma
  • · Replies 14 ·
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14
Undergrad Double Slit Interference Question
  • David Charles
  • · Replies 19 ·
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19
Undergrad Double Slit Interference Question II
  • David Charles
  • · Replies 2 ·
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2
Graduate Quantum computers and Annular Josephson junctions
  • LagrangeEuler
  • · Replies 3 ·
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3
Undergrad Double Slit Experiment Question
  • jellellogram
  • · Replies 2 ·
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2
Undergrad Double slit-experiment confusion
  • user30
  • · Replies 4 ·
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4
High School Can entangled electrons in helium be observed and measured in practice?
  • Andrew Wright
  • · Replies 10 ·
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10
High School Understanding Photon in a Box: Eigenmodes, Reflection, and Energy Measurement
  • ilper
  • · Replies 15 ·
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15
Undergrad Why isn't the Goldstone boson on the Standard Model map?
  • bland
  • · Replies 3 ·
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3
Undergrad Really? Schrödinger's cat again?
  • DaveE
  • · Replies 6 ·
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6
Undergrad Why is the speed of photons different?
  • GREENMONKEY
  • · Replies 4 ·
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4
Graduate Quantum finance equation explanation please
  • yosmod04
  • · Replies 9 ·
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9
Undergrad Is Quantum Mechanics Infinitely More Complex than Classical Mechanics?
  • bob012345
  • · Replies 55 ·
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Undergrad Lorentz violation, multiple preferred frames, vacuum energy
  • asimov42
  • · Replies 16 ·
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16
Undergrad Physicists entangle 15 trillion hot atoms
  • Tom.G
  • · Replies 0 ·
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0
Undergrad Struggling with one step to show quantum operator equality
  • troglodyte
  • · Replies 2 ·
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2
Graduate Ground state energy of a particle-in-a-box in coordinate scaling
  • hilbert2
  • · Replies 4 ·
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4
Graduate What is the cause of radioactive decay?
  • Dukon
  • · Replies 4 ·
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4
Undergrad A question about operator power series
  • Nitram
  • · Replies 14 ·
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14
Undergrad What happened to the spatial degrees of freedom for the second particle?
  • sophiatev
  • · Replies 1 ·
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1
Undergrad Question about this "Quantum laser pointer" that I bought
  • Benplace
  • · Replies 2 ·
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2
Undergrad QED on electromagnetic interactions in atoms
  • WWCY
  • · Replies 9 ·
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9
Undergrad Is it possible for non-spherical atomic orbitals to have spherical symmetry?
  • hokhani
  • · Replies 8 ·
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8
Graduate Contribution of vacuum fluctuation to the self-energy of the electron
  • yztsz
  • · Replies 1 ·
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1
Graduate Hartle-Hawking sum over all possible metrics?
  • Suekdccia
  • · Replies 1 ·
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1
Undergrad Question about simultaneous measurement
  • Mr J
  • · Replies 1 ·
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1
Undergrad Understanding how to get the unpolarized cross-sections
  • JD_PM
  • · Replies 5 ·
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5
Undergrad Maximum violation of Bell's Inequalities?
  • john taylor
  • · Replies 7 ·
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7
Graduate Can Quantum Mechanics Calculate the Frequency of an Atomic Clock?
  • Bruce Harvey
  • · Replies 4 ·
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4
High School Bell's theorem, QFT, and the Relativity of Simultaneity
  • Lynch101
  • · Replies 64 ·
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Graduate Quantum Period is Compression Robust
  • Botsina
  • · Replies 1 ·
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1
Graduate Positive polarity of a retarded Green's function's imaginary part
  • gonadas91
  • · Replies 7 ·
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Undergrad Seeking better explanation of some quantum stats formulae
  • SamRoss
  • · Replies 3 ·
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3
Graduate Question: Unambiguous discrimination between two non-orthogonal states
  • PabloArteaga
  • · Replies 4 ·
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4
Undergrad Feynman's Lectures volume III (Ch:8) -- Resolution of vector states
  • Ishika_96_sparkles
  • · Replies 4 ·
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4