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 Understanding tensor operators
- CAF123
- · Replies 3 ·
Graduate Expectation values of unbounded operator
- Ravi Mohan
- · Replies 2 ·
Graduate Why do position and momentum expectation values vanish for a Gaussian wave function?
- kashokjayaram
- · Replies 2 ·
Graduate Arranging 3 Identical Electrons
- kashokjayaram
- · Replies 6 ·
Graduate Why can we choose wavefunctions to be real?
- AndrewShen
- · Replies 2 ·
Graduate A few basic questions about quantum information
- wywong
- · Replies 1 ·
Graduate Is it Possible to Spin an Atom without Breaking it Apart?
- 1832vin
- · Replies 1 ·
Graduate Why does gravity cause dimensional reduction in entropy scaling?
- M. next
- · Replies 4 ·
Graduate How can you relate standing wave to a corpuscle at rest?
- suvendu
- · Replies 6 ·
Graduate How can I derive the Dirac equation from Lagrangian?
- devd
- · Replies 1 ·
Graduate What is the concept of gauge symmetry in physics?
- ShayanJ
- · Replies 15 ·
Graduate Energy, frequency, and Planck's constant
- michael879
- · Replies 23 ·
Graduate Can Schrödinger's Cat's State Be Measured Through Gravity?
- jon4444
- · Replies 4 ·
Graduate Is discreteness supplied or demanded?
- cwilliams562
- · Replies 4 ·
Graduate Bound state negative potentials into harmonic oscillator basis
- GeneralGrant
- · Replies 2 ·
Undergrad Building a single photon double slit apparatus
- rpfineman
- · Replies 5 ·
Graduate About self-measurement in entangled system
- aalberto
- · Replies 24 ·
Graduate What causes the normal force at the quantum level?
- Matt-er
- · Replies 9 ·
Graduate Baker–Campbell–Hausdorff (CBH) Formula question
- BlackHole213
- · Replies 2 ·
Graduate Homemade Quantum Eraser Experiment revisited with photos and full text
- fizixfan
- · Replies 13 ·
Undergrad Double Slit Experiment Questions
- ivanwho49
- · Replies 4 ·
Graduate Questions about tensor operator
- kjjtr
- · Replies 1 ·
Graduate Energy of electron + positron separated by distance
- xortdsc
- · Replies 12 ·
Graduate Spherical harmonics of Hydrogen-like atoms
- Nikitin
- · Replies 4 ·
Graduate Why can magnetic quantum no. only take values between -l and +l?
- Aerozeppelin
- · Replies 19 ·
Graduate Roksar-Kivelson Hamiltonian for a Quantum Dimer Gas
- Shinn497
- · Replies 1 ·
Undergrad WaveLengths of Light Waves and their respective photons
- user3
- · Replies 9 ·
Graduate Photon interaction with atoms in transparent medias
- Milad H
- · Replies 7 ·
Graduate What is the Quantum Domain and Its Role in Levels of Existence?
- Satya_Sen
- · Replies 4 ·
Graduate Quantum Teleportation: Confusion on Bell-State Measurement Step
- kdlsw
- · Replies 2 ·
Graduate S-Matrix definition and terminology
- geoduck
- · Replies 7 ·
Graduate Quantum Vacuum and Quantum Foam
- Quantizer
- · Replies 9 ·
Graduate Quantum interference. Really. Really?
- wildee44
- · Replies 12 ·
Graduate Calculating Commutator of Differential Angular Momentum
- Chem.Stud.
- · Replies 5 ·
Graduate Other Theories of the Quantum Brain
- BHL 20
- · Replies 16 ·
Graduate Stern-Gerlach spin probability
- sweetdreams12
- · Replies 1 ·
Graduate Black-body radiation spectral analysis
- mic*
- · Replies 2 ·
Graduate Problem with Gaussian Integral
- facenian
- · Replies 6 ·
Graduate Is the distintion between vector and rays relevant?
- carllacan
- · Replies 4 ·
Graduate Why is the momentum wave function the Fourier transform of the position wave function?
- Nikitin
- · Replies 11 ·
Graduate What are some potential applications of quantum teleportation?
- Strilanc
- · Replies 8 ·
Graduate Frequency = mass or does it?
- H_A_Landman
- · Replies 10 ·
Graduate How Can Higher Order Relativistic Corrections Improve Hydrogen Atom Models?
- M. next
- · Replies 4 ·
Graduate Alternative definition of constants
- carllacan
- · Replies 6 ·
Graduate Reconstructing operators from matrix components and calculating expectation values
- Inertia
- · Replies 1 ·
Graduate A new version of quantum theory
- ftr
- · Replies 4 ·
Graduate Photobleaching of fluorophores
- gkiverm
- · Replies 6 ·
Graduate What Does a Negative or Imaginary Partition Function Indicate?
- santale
- · Replies 4 ·
Graduate Why specific normalization in Stark effect superposition
- M. next
- · Replies 9 ·
Graduate Quantum Eraser experiment reproduced at home
- fizixfan
- · Replies 4 ·
Graduate What is electron correlation in molecular systems and what types exist?
- Karrar
- · Replies 5 ·
Graduate The main problem with Hidden Variable Theory
- hankaaron
- · Replies 7 ·
Graduate Sakurai Degenerate Perturbation Theory: projection operators
- maverick280857
- · Replies 3 ·
Graduate Does information always conserve?
- kdlsw
- · Replies 2 ·
Graduate How to quantize a particle confined to the surface of a sphere?
- wdlang
- · Replies 5 ·
Graduate Particle annihilation in quantum vacuum
- pabloxd43
- · Replies 2 ·
Graduate Interpreting detector states in Zeilinger's four-detector interferometry setup
- naima
- · Replies 1 ·
Graduate Would gravity waves exhibit quantum properties?
- wmikewells
- · Replies 7 ·
Graduate Kochen-Specker Proofs Look Wrong to Me
- nougiecat
- · Replies 1 ·
Graduate Effect of phase change in wave function on energy
- jordankonisky
- · Replies 1 ·
Graduate State vector behaviour during coupling
- James MC
- · Replies 15 ·
Graduate Relating the two quantized angular momentum formulas for hydrogen
- RKlintworth
- · Replies 8 ·
Undergrad A little magic trick with polarized film
- fizixfan
- · Replies 22 ·
Graduate Srednicki's normalization of path integral
- geoduck
- · Replies 4 ·
Graduate Superdense coding for sending 2 qubits at a time?
- Strilanc
- · Replies 1 ·
Graduate Understanding Wavefunction Collapse After Measurement
- Waxterzz
- · Replies 2 ·
Graduate Trying to understand particle polarization
- Chain
- · Replies 5 ·
Graduate Klein-Gordon Field: Understanding Eq. (1)
- grimx
- · Replies 4 ·
Graduate Does quantum computer can to send the information faster than light ?
- parakorn
- · Replies 1 ·
Graduate Continuous resolution of identity in a discrete Hilbert-space
- FredMadison
- · Replies 5 ·
Graduate Why must a scalar field have a constant vacuum expectation value?
- lalo_u
- · Replies 8 ·
Graduate No solution with E=v0 for step potential
- hnicholls
- · Replies 2 ·
Undergrad How does polarization change during reflection, refraction and diffraction?
- alter
- · Replies 6 ·
Graduate How to get the commutation relation of q and p
- chern
- · Replies 5 ·
Graduate Positronium from vacuum fluctuations ?
- xortdsc
- · Replies 4 ·
Graduate Normalization constant in wave function and related quantum mechanics problems
- KFG2050
- · Replies 1 ·
Graduate Pointer Momentum of a Measuring Apparatus
- SheikYerbouti
- · Replies 3 ·
Graduate Crude Probability calculation for tunneling
- decerto
- · Replies 2 ·
Graduate Conserved quantities as symmetry generators
- Chopin
- · Replies 1 ·
Graduate Quantum Entanglement Basic Experiment Question
- st29
- · Replies 2 ·
Graduate Expectation value of an operator
- suma
- · Replies 1 ·
Graduate Translation operator on a sphere
- kashokjayaram
- · Replies 5 ·
Graduate The central mystery of quantum mechanics (according to Feynman)
- Dadface
- · Replies 30 ·
Graduate Weak gravity at quantum level?
- M. next
- · Replies 4 ·
Graduate Orbitals while transitioning from free electron to ground state
- rconde01
- · Replies 5 ·
Graduate What causes different energy levels in atoms with multiple electrons?
- Goodver
- · Replies 1 ·
Graduate Covariant vs Canonical Formalism
- Quantizer
- · Replies 4 ·
Graduate Non Polynomial Hamiltonian Constraint
- Quantizer
- · Replies 1 ·
Graduate Quantum Mechanics as Quantum Information
- Jilang
- · Replies 2 ·
Graduate Projective representations of the spin group
- electroweak
- · Replies 4 ·
Graduate Isotropic absorption and emission
- ArchieDave
- · Replies 1 ·
Undergrad Do you know any properties of photons?
- Dadface
- · Replies 1 ·
Graduate Verifying Equality in Scarani's "Six Quantum Pieces
- StevieTNZ
- · Replies 25 ·
Graduate Complementarity with single slit diffraction
- DParlevliet
- · Replies 5 ·
Graduate Does time reversal symmetry imply hermicity of s-matrix?
- geoduck
- · Replies 5 ·
Graduate Is ρV a reliable measure of atom probability in small volumes?
- aaaa202
- · Replies 4 ·
Graduate Probability theory and quantum mechanics
- V0ODO0CH1LD
- · Replies 11 ·
Graduate Angular momentum Operators and Commutation
- cooev769
- · Replies 29 ·
Graduate Physically realisable states and spectra
- cooev769
- · Replies 6 ·
Graduate Does uncertainty of position of particles make substances continuous?
- mrspeedybob
- · Replies 11 ·