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.
Threads
Graduate Math of the uncertainty principle
- Durandarte
- · Replies 3 ·
Graduate Are Observables Only Quantities That Commute with Hamiltonian?
- audioloop
- · Replies 10 ·
Undergrad Energy differences between sub shells
- CAF123
- · Replies 25 ·
Graduate Time Symmetric Quantum Mechanics
- dm4b
- · Replies 19 ·
Graduate Linear potential well solutions and flat well
- solas99
- · Replies 1 ·
Graduate Potential Step (wave amplitude)
- solas99
- · Replies 1 ·
Graduate Contour integration in propagator
- ianhoolihan
- · Replies 50 ·
Undergrad What is the Wavelength of Earth and its Impact on the Macroscopic World?
- student34
- · Replies 20 ·
Graduate Why does Wien's displacement law predict infinite radiation energy?
- g.lemaitre
- · Replies 1 ·
Graduate Down quarks force vs ten tonnes truck force
- Orion78
- · Replies 4 ·
Graduate Dirac notation expressions as integrals
- maalpu
- · Replies 7 ·
Graduate Is Light the Only Form of Energy Released When Electrons Jump?
- jd12345
- · Replies 13 ·
Graduate Sean Carroll's view of the atom
- g.lemaitre
- · Replies 6 ·
Graduate Is Energy Really Quantized ? (electric Potential enrgy)
- hms.tech
- · Replies 8 ·
Graduate Displacement Operator definition
- McLaren Rulez
- · Replies 4 ·
Graduate Wave function collapse by orbital angular momentum operator Lz
- USeptim
- · Replies 3 ·
Graduate Particle number and resonance with Klein-Gordon waves.
- ianhoolihan
- · Replies 10 ·
Graduate Commutators, propagators, and measurement.
- ianhoolihan
- · Replies 25 ·
Graduate Operator-state correpondence in CFT
- physicus
- · Replies 1 ·
Graduate Question about the continuous beta-spectrum
- Jack_G
- · Replies 1 ·
Graduate P orbital lobes tangent to plane of nucleus
- qhyperbola
- · Replies 4 ·
Graduate A question about Feynman's book of Path. integrals
- aife
- · Replies 2 ·
Graduate What makes matrix mechanics matrix mechanics?
- Einstein Mcfly
- · Replies 31 ·
Graduate Non-Orientable Quantum Surface
- JPBenowitz
- · Replies 2 ·
Graduate Matrix rep of operator acting on bras
- dEdt
- · Replies 15 ·
Graduate Mathematical Quantum Statistics: Why is A*rho of trace class?
- Illuvatar
- · Replies 1 ·
Graduate Dimension of <xn,tn|xn-1,tn-1>
- einstein1921
- · Replies 4 ·
Graduate Exploring Planck's Hypothesis & Einstein's Extension to EMR
- XtremePhysX
- · Replies 3 ·
Graduate Lorentz-invariant electric charge?
- gulsen
- · Replies 51 ·
Graduate Confusion about derivative operators
- Loro
- · Replies 20 ·
Graduate A-causal & Non-Local: Explaining Quantum Mechanics
- exmarine
- · Replies 7 ·
Graduate How to make relativistic correction to perturbation?
- zhanhai
- · Replies 1 ·
Graduate Why do the X, Y, Z operators switch parity?
- VortexLattice
- · Replies 4 ·
Graduate What is the definition of the spin of a particle?
- AbsoluteZer0
- · Replies 19 ·
Graduate The wave function of hydrogen
- einstein1921
- · Replies 4 ·
Graduate Understanding 'Kronecker Delta' in Feynman's Vol. 3 Lectures on Physics
- maser
- · Replies 2 ·
Graduate Where does the electron go during a quantum jump?
- QuantumHop
- · Replies 7 ·
Graduate Are We Still Entangled Since the Big Bang?
- AlSo
- · Replies 12 ·
Graduate Mediator of electrostatic repulsion
- rrosenthal
- · Replies 3 ·
Graduate What size do particles start to get a quantum effect
- Dammes
- · Replies 6 ·
Graduate What is the Uniqueness of Operators Acting on Bras in Quantum Mechanics?
- dEdt
- · Replies 7 ·
Graduate Dirac's Quantum Mechanics - the definition of the time evolution operator
- Loro
- · Replies 4 ·
Graduate General Formula for atomic emission spectra
- rayclan
- · Replies 1 ·
Graduate Explaining the Inclusion of Minus Sine in the Heisenberg Hamiltonian Definition
- matematikuvol
- · Replies 1 ·
Graduate How Does the ΔS = 0 Selection Rule Arise?
- pfollansbee
- · Replies 2 ·
Graduate Singlet/Triplet state mixing question
- pfollansbee
- · Replies 5 ·
Graduate Understanding the Deterministic Evolution of Wave Functions in Quantum Mechanics
- cragar
- · Replies 3 ·
Graduate Pilot wave theory, fundamental forces
- msumm
- · Replies 159 ·
Graduate Understanding Scattering in Quantum Mechanics
- VortexLattice
- · Replies 5 ·
Graduate Superposition principle explained
- rasp
- · Replies 3 ·
Undergrad What was the ultraviolet catastrophe
- CrimpJiggler
- · Replies 10 ·
Undergrad Is It Accurate to Measure the Elementary Charge with Just One Oil Drop?
- tvelev92
- · Replies 5 ·
Graduate Gauge Theory: Simplified Explanation & Examples for Physics
- vikram_n
- · Replies 7 ·
Graduate Who first solved the hydrogen atom in quantum mechanics?
- wdlang
- · Replies 5 ·
Graduate Maxwell-Bloch equations and operator-products
- Niles
- · Replies 10 ·
Graduate Is It Legal for Electrons to Have Energy Between Atomic Orbitals?
- Ezio3.1415
- · Replies 11 ·
Graduate No logically consistent relativistic quantum theory?
- genericusrnme
- · Replies 8 ·
Graduate Poincare Recurrence and the Klein-Gordon Equation
- JPBenowitz
- · Replies 1 ·
Graduate I am doing a measurement in a system S with the apparatus A, in an
- StarsRuler
- · Replies 2 ·
Graduate Trying to find references for polarization effect of Normal Zeeman Effect
- Ashuron
- · Replies 4 ·
Graduate Effect of phase difference on interference pattern
- San K
- · Replies 4 ·
Graduate Scattering partial wave expansion question
- VortexLattice
- · Replies 5 ·
Graduate How Should I Begin Studying Topological Quantum Field Theory?
- FedEx
- · Replies 1 ·
Graduate Timelike Curves leads to violation of heisenberg uncertainty Relation
- audioloop
- · Replies 4 ·
Graduate Bosons's amplitude to go into the same state at low temperatures
- zalook
- · Replies 1 ·
Graduate Equality of expectation value integral over coordinate space and over energy
- Derivator
- · Replies 3 ·
Graduate QM: What are Tensor Operators & How to Understand Georgi's Definition?
- Kontilera
- · Replies 3 ·
Graduate Collapse of wave function question
- VortexLattice
- · Replies 12 ·
Graduate 4-point correlation in phi 4 to first order
- jfy4
- · Replies 3 ·
Graduate Partial trace of density matrix
- climbon
- · Replies 1 ·
Graduate A quantum particle at rest viewed from a merry-go-round.
- Spinnor
- · Replies 4 ·
Graduate Question for understanding photon entanglement
- Philosifur
- · Replies 1 ·
Graduate Understanding Exponential of Operator: Expansion and Eigenvalues Explained
- KFC
- · Replies 3 ·
Graduate Klein-gordan Hamiltonian time-independent?
- geoduck
- · Replies 1 ·
Graduate Measurement of spin due to the force on a magnet
- Prathyush
- · Replies 15 ·
Graduate About eq. (5.7.23) in Weinberg's The quantum theory of fields vol. I
- diraq
- · Replies 1 ·
Graduate Quantum Falling Magnet: Lenz's Law Demo?
- gildomar
- · Replies 4 ·
Graduate Dimensions of klein-gordon field
- iangttymn
- · Replies 7 ·
Graduate Question about quantum numbers:
- VortexLattice
- · Replies 9 ·
Graduate What are Virtual Particles and How Do Borrowing and Repaying Work?
- JPBenowitz
- · Replies 28 ·
Graduate Weih's data: what ad hoc explanations do local and non-local models give?
- harrylin
- · Replies 60 ·
Graduate Wave-particle duality is a correct theory of reality
- Ostronomos
- · Replies 14 ·
Graduate Nonlinear evolution of the quantum mechanical state vector
- modaniel
- · Replies 1 ·
Undergrad What is the momentum of an electron?
- iVenky
- · Replies 1 ·
Graduate How does a non-linear Schrodinger equation implies non-unitary evolution?
- IRobot
- · Replies 2 ·
Graduate A question regarding tensor product of hilbert spaces
- azztech77
- · Replies 1 ·
Graduate What Particles Could Have Spin 2 1/2 in Physics?
- ImaLooser
- · Replies 4 ·
Graduate A classical wave as sum of many coherent quantum wavelets?
- lightarrow
- · Replies 7 ·
Graduate Eigenvalues for X’s Pauli's matrix
- USeptim
- · Replies 2 ·
Undergrad Symmetry and symmetry breaking
- vikram_n
- · Replies 4 ·
Graduate Wave properties of an electron
- physics kiddy
- · Replies 3 ·
Graduate Question on Decoherence and the Delayed Choice Quantum Eraser
- dtdynd
- · Replies 2 ·
Graduate How Do Spin and Symmetry Relate in Particle Physics and SUSY?
- friend
- · Replies 8 ·
Graduate Undergrad w/o formal quantum introduction, having trouble
- agm2010
- · Replies 1 ·
Graduate Total energy vs. energy in a finite region
- giova7_89
- · Replies 2 ·
Graduate Effective field theories, eliminating fields using equations of motion
- rgoerke
- · Replies 3 ·
Undergrad Different formulas, same physics?
- nonequilibrium
- · Replies 8 ·
Graduate Wiegner Eckart theorem, I don't understand it
- Jamalll
- · Replies 3 ·
Graduate Parity switching wave functions for a parity invariant hamiltonian?
- VortexLattice
- · Replies 2 ·
Graduate Is Braket Operation Legal? Elaborate Here
- intervoxel
- · Replies 3 ·