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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Graduate Heisenberg's uncertainty principle invalidated?
- quantumphilosopher
- · Replies 23 ·
Graduate Questions about entanglement from a non-physicist
- pkrahn
- · Replies 12 ·
Graduate Interference pattern calculations for unequal slits per QM theory
- San K
- · Replies 5 ·
Graduate Isomorphism symmetry group of 6j symbol
- Yoran91
- · Replies 4 ·
Simple Normalization/schrodinger equation problem
- Normalization
- · Replies 1 ·
Undergrad Diffraction and Probability Amplitude
- Johnleprekan
- · Replies 7 ·
High School What is Orbital Angular Momentum?
- Johnleprekan
- · Replies 3 ·
Graduate Quantum mechanics in multiple dimensions
- aaaa202
- · Replies 9 ·
Undergrad Why can frequency vary continuously if energy must be quantized?
- ENDLESSYOU
- · Replies 2 ·
Graduate Is the wave-function description of photon location incomplete?
- San K
- · Replies 8 ·
Graduate Proof that all operators are linear
- dEdt
- · Replies 12 ·
Graduate Quantum field theory, photons, and polarization.
- Spinnor
- · Replies 9 ·
Graduate The Nature of Knowledge in Quantum Mechanics
- kebugcheck
- · Replies 30 ·
Graduate Double slit experiment - no interference in the vicinity of light
- sryzdn
- · Replies 2 ·
Graduate Fermionic Number Operator Help
- pleasehelpmeno
- · Replies 19 ·
Graduate Normalizing a wave function - how the integration is done?
- 71GA
- · Replies 7 ·
Graduate Best way to solve Schrodinger's wave equation numerically.
- Slide rule
- · Replies 4 ·
Graduate Terms in the Yang-Mills Lagrangian
- dm4b
- · Replies 17 ·
High School Helo, I am just wondering about some info I foind on the web.
- duskwood100
- · Replies 7 ·
Undergrad Understanding SHM: Calculating the Wave Function of a Simple Harmonic Wave
- Saxby
- · Replies 4 ·
Graduate Finding the Eigen Value of A.σ Vector Product
- rupesh57272
- · Replies 6 ·
Graduate Is this definition of quantum entanglement correct?
- g.lemaitre
- · Replies 3 ·
Graduate Can someone give me some examples on the schrodinger equation?
- Ayham
- · Replies 1 ·
Graduate What is the difference between a wave of water and qm wave?
- g.lemaitre
- · Replies 4 ·
Graduate Algorithm for finding constants in finite potential well Schrödinger equation
- ChaseRLewis
- · Replies 4 ·
Graduate Do angular momentum operators anti-commute?
- Demon117
- · Replies 1 ·
Graduate Couple of quantum fluctuation related questions from a curious layman
- danihel
- · Replies 1 ·
Graduate Minimal Subsitution from Lorentz Invariance
- Sekonda
- · Replies 1 ·
Graduate Why are there multiple Slater determinants for the same number of electrons?
- aaaa202
- · Replies 10 ·
Graduate Dirac Equation: Gamma Matrices as 4-Vector Components?
- vijaychitgopka
- · Replies 2 ·
Graduate Spin-orbit coupling for s-orbital states
- htkhs
- · Replies 9 ·
Graduate Can Measuring One Spin Disentangle Electrons?
- LarryS
- · Replies 14 ·
Graduate What is the physical meaning of [H,ρ ]=0 for a stationary state?
- jiadong
- · Replies 6 ·
Graduate Why do uncertainty principle problems solve for position when we can't know it exactly?
- quicksilver123
- · Replies 5 ·
Graduate Is this the uncertainty principle or diffraction?
- mrspeedybob
- · Replies 1 ·
Undergrad P-subshell orbital of Hydrogen
- cadamcross2
- · Replies 7 ·
Graduate Why are only some photons virtual?
- Mukilab
- · Replies 3 ·
Graduate Entanglement happens at what speed?
- boffinwannabe
- · Replies 4 ·
Graduate Why square the absolute value of the wave function for probabilities
- 71GA
- · Replies 2 ·
Graduate Virtual particles vs. real particles
- PerpStudent
- · Replies 12 ·
Graduate How Do Photons Mediate Attraction Between Oppositely Charged Particles?
- Lazernugget
- · Replies 1 ·
Undergrad Photoelectric effect - Frequency vs. Current
- jaumzaum
- · Replies 6 ·
Graduate What does it mean for a matrix to be diagonal in perturbation theory?
- M. next
- · Replies 3 ·
Graduate Planck's Derivation of Quantization: Summation vs Integrand
- ENDLESSYOU
- · Replies 2 ·
Graduate Variational Method vs Inverse Rayleigh Method with Shifting
- HasuChObe
- · Replies 1 ·
Graduate Is Bell's theorem near-sighted?
- spenserf
- · Replies 20 ·
Graduate Quantizing the scalar field in an expanding universe
- pleasehelpmeno
- · Replies 1 ·
Graduate Finding Born approximation references in Peskin & Schroeder
- center o bass
- · Replies 6 ·
Graduate Good introduction to the Bethe-Salpeter equation
- EuphoGuy
- · Replies 8 ·
Graduate Separating operators into classical + quantum
- DrClaude
- · Replies 3 ·
Undergrad Radiation absorption by an atom
- jaumzaum
- · Replies 4 ·
Graduate Has the double slit experiment been conducted without a detector?
- b1ll
- · Replies 2 ·
Graduate Why do quantum fields have infinite degrees of freedom?
- cragar
- · Replies 24 ·
Graduate Photons violate Uncertainty Principle?
- sarvesh0303
- · Replies 2 ·
Graduate Formal integration of Heissenberg equation?
- climbon
- · Replies 2 ·
Graduate Can position and momentum be measured accurately in a single measurement?
- MHD93
- · Replies 6 ·
Undergrad Chaos Theory and Schrodinger's Cat: A Quirky Connection
- rsaad
- · Replies 2 ·
Graduate Lorentz action on creation/annihilation operators
- jackson1
- · Replies 12 ·
Graduate Can bodies be made to radiate at one freq.
- philrainey
- · Replies 6 ·
Graduate Ehrenfest theorem for kinetic energy
- cartatum
- · Replies 6 ·
Graduate Joy Christian, Disproof of Bell's Theorem
- bcrowell
- · Replies 253 ·
Graduate Renormalized vertex always a log?
- geoduck
- · Replies 3 ·
Graduate What is the condition for one-dimensional motion in an infinite potential well?
- matematikuvol
- · Replies 13 ·
Graduate How does quantum mechanics define time
- Chemist@
- · Replies 5 ·
Graduate Understanding Spin in Composite Systems
- aaaa202
- · Replies 1 ·
Graduate Can an electron absorb multiple photons at once?
- big_bounce
- · Replies 8 ·
Graduate What contributes to proton mass besides quark mass?
- big_bounce
- · Replies 12 ·
Graduate What Are Meta-Stable States in Atoms and Their Role in Lasing Action?
- moatasim23
- · Replies 1 ·
Graduate Probability Density and Current of Dirac Equation
- Sekonda
- · Replies 8 ·
Undergrad How does an EM wave affect an atom's energy levels?
- moatasim23
- · Replies 1 ·
Graduate Can Aufbau and Hund's Rule explain electron filling after EC?
- Notgiven
- · Replies 1 ·
Graduate Is Pilot Wave Theory in Conflict with the Original Matter Wave Theory?
- phyky
- · Replies 1 ·
Graduate Feynman’s path integral and an electron in a Penning trap
- ajw1
- · Replies 3 ·
Graduate Evidence of single photon absorption?
- IxRxPhysicist
- · Replies 16 ·
Undergrad Can the Movement of Atomic Parts Be Measured in Time?
- 0day
- · Replies 5 ·
Graduate How do I solve the Schrodinger wave equation with a differential equation?
- vmercel
- · Replies 1 ·
Graduate Significance of Order in Feynman Diagrams
- Demon117
- · Replies 2 ·
Graduate Quantum entanglement and the uncertainty principle
- PhysicsDad
- · Replies 1 ·
Graduate Implications of Heisenberg uncertainty principle
- pleasehelpmeno
- · Replies 2 ·
Graduate Regularization scheme independence?
- geoduck
- · Replies 5 ·
Graduate How do wave-functions deal with energy (of the photon)?
- San K
- · Replies 6 ·
Graduate Rigged Hilbert space, separable space, domain of CSCO, mapping
- Petro z sela
- · Replies 29 ·
Graduate Publication: perpetuum mobile of fourth type
- rositiv
- · Replies 1 ·
Graduate How does this formula relate to particle creation?
- AbsoluteZer0
- · Replies 2 ·
Graduate Composite system, rigged Hilbert space, bounded unbounded operator, CSCO, domain
- Petro z sela
- · Replies 3 ·
Graduate Imposing Klein-Gordon on Dirac Equation
- Sekonda
- · Replies 3 ·
Graduate What does a quantum state represent in quantum theory?
- jaumzaum
- · Replies 23 ·
Graduate How a particle tells time (Holger Mueller et al in *Science*)
- marcus
- · Replies 4 ·
Graduate Biological photonics: Can there be light in the brain?
- JohnRood
- · Replies 9 ·
Graduate Dirac equation in cosmology with scale factor
- pleasehelpmeno
- · Replies 2 ·
Undergrad A problem about blackbody radiation
- VHAHAHA
- · Replies 3 ·
Undergrad Atomic excitation and electron orbits
- cooper607
- · Replies 1 ·
Graduate Rigorous definitions in quantum mechanics
- Nana Dutchou
- · Replies 7 ·
Graduate Feynman Lectures Volume 3 Equation 9.41
- vappole
- · Replies 3 ·
Undergrad About photoelectric effect and work function
- VHAHAHA
- · Replies 3 ·
Graduate What is a quantum state?
- shounakbhatta
- · Replies 24 ·
Graduate Wavelength associated with the body - What does it mean?
- jaumzaum
- · Replies 2 ·
Graduate Why Do Fermions Have +1/2 and -1/2 Spin?
- shounakbhatta
- · Replies 8 ·
Graduate Double Slit Quantum Eraser, Really?
- i8uncertainty
- · Replies 14 ·
Graduate Has Anybody Ever Tried to Build a Build an Brownian Ratchet?
- James Brady
- · Replies 2 ·