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 Scaling - Inverse relationship between uncertainty and mass
- Dave1939
- · Replies 31 ·
Graduate DeBroglie wavelength of Proton in H atom
- Davephaelon
- · Replies 5 ·
Graduate Can the ammonia inversion method apply to excited states?
- Konte
- · Replies 16 ·
Graduate Why Is Average Energy per Mode in Rayleigh-Jeans Law Always kT?
- Darren93
- · Replies 5 ·
Graduate Sources to learn QM while commuting to school?
- 1832vin
- · Replies 2 ·
Graduate Creating superimposed states in an Hydrogen Atom
- Julian Blair
- · Replies 3 ·
Graduate Quantum mechanics notation: psi tilde, h-bar and learning order
- 1832vin
- · Replies 2 ·
Graduate Fundamentally why require causality?
- 5not42!
- · Replies 8 ·
Graduate Whether Photons Do In Fact Age
- SolomonSnake
- · Replies 1 ·
Graduate Where to find the derivation of the vacuum spectral energy expression
- Apollo2010
- · Replies 1 ·
Graduate Cosmology from Quantum Potential
- gelatin
- · Replies 2 ·
Graduate Standing waves corresponding to a confined particle
- cdot
- · Replies 2 ·
Graduate Minimal coupling of a Field with electromagnetism
- Jesus
- · Replies 2 ·
Graduate Tensor product and representations
- JonnyMaddox
- · Replies 11 ·
Graduate Wave Vector Collapse: Solving the Math Puzzle of Position and Momentum Operators
- A Dhingra
- · Replies 6 ·
Graduate Derivation of standard model lagrangian
- resurgance2001
- · Replies 9 ·
Graduate Measured result is equal to expectation value
- BUI TUAN KHAI
- · Replies 4 ·
Graduate How to visualize a moving probability wave?
- jimmylegss
- · Replies 2 ·
Graduate What is responsible for force in the standard model?
- ftr
- · Replies 9 ·
Graduate Does observing a particle require hitting it with another particle?
- silvercats
- · Replies 8 ·
Graduate Technical steps in the quantum entanglement experiments
- sanpkl
- · Replies 2 ·
Graduate Indirectly measure if particle spin is in superstate or not?
- hydrowolfy
- · Replies 3 ·
Graduate Grand canonical and canonical ensemble
- mimpim
- · Replies 4 ·
Graduate About the photon exchange and the electromagnetic force
- tonyxon22
- · Replies 4 ·
Graduate Calculating energy from de Broglie wavelength
- Alephu5
- · Replies 2 ·
Graduate Quote from Feynman and Hibbs book
- exmarine
- · Replies 2 ·
Graduate Can individual photon positions be predicted in double slit interference?
- Arthurz11
- · Replies 11 ·
Graduate Why do different wave equations have varying numbers of derivatives?
- DiracPool
- · Replies 5 ·
Graduate Does knowledge of a cat's death collapse superposition without opening the box?
- bland
- · Replies 51 ·
Graduate Basic commutator of angular momentum
- catsarebad
- · Replies 3 ·
Graduate Time evolution of a state. (a missing t)
- naima
- · Replies 2 ·
Graduate Can massless states be used to build massive ones?
- Spinnor
- · Replies 7 ·
Graduate Quantum harmonic oscillator tunneling puzzle
- arkajad
- · Replies 33 ·
Graduate How do you get from equation (2) to (3) in quantum mechanics?
- resurgance2001
- · Replies 2 ·
Graduate How directional is a single photon?
- intervoxel
- · Replies 10 ·
Graduate Can we accurately measure the momentum of a particle?
- kini.Amith
- · Replies 3 ·
Graduate Why is the smallest energy transfer in quantum measurement uncontrollable?
- gianeshwar
- · Replies 4 ·
Graduate Does a neutron star act like a big particle?
- John Kierein
- · Replies 15 ·
Graduate About the Uncertainty Principle
- tonyxon22
- · Replies 2 ·
Undergrad What is the relationship between atomic structure and molecular orbital theory?
- akashpandey
- · Replies 6 ·
Graduate Quantum Mechanics: Probablities
- Robben
- · Replies 1 ·
Graduate Negative Probability and Bell's Theorem
- Jilang
- · Replies 5 ·
Graduate Is Spin Related to Angular Momentum in Elementary Particles?
- Ahmad Kishki
- · Replies 11 ·
Graduate Is Manipulating the Stefan-Boltzmann Law with Metamaterials Possible?
- gildomar
- · Replies 1 ·
Graduate Special relativity violation using entanglement
- Idoubt
- · Replies 4 ·
Graduate Can quantum entanglement be used to transmit information faster than light?
- shakila
- · Replies 15 ·
Undergrad What photon or electron detector is used in double slit experiments?
- JakeGard740
- · Replies 1 ·
Graduate Uncertainty principle presentation
- sythrox
- · Replies 7 ·
Graduate How to Count Wick Contractions in Phi^3 Theory?
- Dixanadu
- · Replies 1 ·
Graduate Units of Fourier expanded field
- copernicus1
- · Replies 1 ·
Graduate Raising operator for s in |s,m> states
- lfqm
- · Replies 3 ·
Graduate How does quantum mechanics explain the stability of macroobjects?
- smoothoperator
- · Replies 7 ·
Graduate Unintended observations, how do we do with it?
- sweet springs
- · Replies 6 ·
Graduate Why does S² equal ℏ²s(s+1) for spin-1/2?
- Robben
- · Replies 9 ·
Graduate Maxwells theory about electromagnetism
- akashpandey
- · Replies 2 ·
Graduate Do low atomic numbers not obey Moseley's law?
- mukul
- · Replies 1 ·
Graduate Mass dimension of coupling constant -- always an integer?
- guest1234
- · Replies 5 ·
Graduate It is said that we can not go lower than the planck limit
- Molari
- · Replies 5 ·
Graduate Entanglement and Spin in Electron Interactions
- anorlunda
- · Replies 7 ·
Graduate Vector representation of a Quantum State
- Goodver
- · Replies 5 ·
Undergrad How does Bragg's law relate wavelength to atomic spacing?
- MintyPanda
- · Replies 8 ·
Graduate Time independent schrödinger equation query
- gfd43tg
- · Replies 10 ·
Graduate Expectation value of operator derivation
- Goodver
- · Replies 1 ·
Graduate Formulation of quantum mechanics
- gentsagree
- · Replies 4 ·
Graduate Is the Interaction in the Canonical Formalism Lorentz Invariant?
- Roumpedakis
- · Replies 2 ·
Graduate Spins on electrons versus photons
- cygnet1
- · Replies 5 ·
Graduate Mathematical state of Path Integral?
- "pi"mp
- · Replies 2 ·
Graduate Curiosity about the wavefunction
- gentsagree
- · Replies 3 ·
Graduate Separation of variables to solve Schrodinger equation
- kini.Amith
- · Replies 7 ·
Graduate When does the photon splits in 2 on the Two Slit Experiment?
- Arthurz11
- · Replies 14 ·
Graduate Double Slit Question: Can We Know From Which Slit?
- cartmanbrah
- · Replies 5 ·
Undergrad Does the observer effect prove reality is an illusion?
- Rajkovic
- · Replies 1 ·
Graduate Is the collapse of the particle wave function?
- Nick V
- · Replies 96 ·
Graduate Photoelectric effect without photons
- ShayanJ
- · Replies 6 ·
Graduate Relabeling spin or angular momentum operators
- aaaa202
- · Replies 2 ·
Graduate Why Can't Quantum Numbers Include Half Integers?
- HiggsBoson1
- · Replies 3 ·
Graduate How Can We Manipulate 8 Quantum Combinations with Qubit Computing?
- Edward Wij
- · Replies 1 ·
Graduate Scaling of an eigenvalue with the coupling constant
- spaghetti3451
- · Replies 3 ·
Graduate The ground state e- is the largest negative value, but why?
- shangriphysics
- · Replies 4 ·
Graduate Generalized Dirac Equation for All Fermions?
- LarryS
- · Replies 4 ·
Graduate Uncertainty principle and relativity
- barefeet
- · Replies 20 ·
Graduate Hawking Radiation: The Role of Electromagnetism in Black Hole Evaporation
- carcosachild
- · Replies 2 ·
Graduate Wave function interpretation and particle properties in quantum mechanics
- JasonWuzHear
- · Replies 2 ·
Graduate Light like interval in wave function
- novice_hack
- · Replies 1 ·
Graduate Diffraction wavelength of particles in moving frames?
- knowing
- · Replies 1 ·
Graduate What is the relation between wave function on a photon
- Tigersharkmks
- · Replies 1 ·
Graduate Direction of a photon is fixed upon creation or observation?
- James White
- · Replies 21 ·
Graduate Vacuum energy-fundamental particle
- mreuterskiold3
- · Replies 3 ·
Graduate Generating function for the zeta function of the Hamiltonian
- spaghetti3451
- · Replies 7 ·
Graduate Do Pauli matrix angles correspond to spatial measurement axes?
- nomadreid
- · Replies 6 ·
Graduate The original postulates of quantum mechanics
- kini.Amith
- · Replies 22 ·
Graduate Probability of quantum tunneling?
- Dembara
- · Replies 9 ·
Graduate What are matrix elements in QFT?
- geoduck
- · Replies 3 ·
Graduate Energy Eigenstates inside a one-dimension box
- Rick2015
- · Replies 3 ·
Graduate Can a delayed choice quantum eraser let observers change the past?
- cartmanbrah
- · Replies 2 ·
Graduate I'm having some trouble understanding bra-ket notation?
- verschrankung
- · Replies 1 ·
Graduate Quantum Mechanics Exam Prep for PhDs
- Dirac62
- · Replies 10 ·
Graduate What does the symbol sigma represent in electromagnetic calorimetry equations?
- GoBluePhysics
- · Replies 1 ·
Graduate Hermitian conjugate of a Hermitian Conjugate
- teaJ
- · Replies 3 ·
Graduate Momentum operator in curvilinear coordinates
- ShayanJ
- · Replies 82 ·