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.
Sub-forums
Threads
Graduate Was the particle in a box analogy a recent one?
- Grier
- · Replies 1 ·
Graduate The harmonic oscillator in terms of path integrals without dirac notation
- roberto85
- · Replies 1 ·
Graduate Quantum Tunneling- Walking through walls
- caljuice
- · Replies 2 ·
Graduate Measure on Path Integral not defined
- friend
- · Replies 35 ·
Graduate Is There a Mistake in Ballentine's Description of the Variational Principle?
- Derivator
- · Replies 1 ·
Graduate Which of the four forces is responsible for degeneracy pressure?
- LennoxLewis
- · Replies 67 ·
Graduate Does H(t1+t2)=Ht1+Ht2 for operators?
- Cosmossos
- · Replies 2 ·
Graduate Quick Braket notation question
- Crosshash
- · Replies 3 ·
Undergrad How are expectation values calculated?
- Cosmossos
- · Replies 7 ·
Graduate Commutators and Their Properties in Quantum Mechanics
- vertices
- · Replies 4 ·
Graduate Definitoon of trajectory in quantum physics, especially in path integrals
- roberto85
- · Replies 3 ·
Graduate Algebraic solution of hydrogenic atom
- kowalski
- · Replies 8 ·
Graduate Ultimate Fate of a Hydrogen Atom in a Perfect Vacuum
- NthDeegree
- · Replies 2 ·
Graduate Why are energy changes discrete in quantum mechanics?
- roshan2004
- · Replies 12 ·
Undergrad Does Distance Affect the Double-Slit Experiment?
- physx_420
- · Replies 5 ·
Identifying a quantum mechanics formula from an image
- thebigstar25
- · Replies 4 ·
Graduate How does they check the number of atoms in BEC?
- Choi Si Youn
- · Replies 1 ·
Graduate Quantum theory of the past and wave function collapse
- 0xDEADBEEF
- · Replies 6 ·
Graduate Paramagnetic term of the hamiltonian
- dd331
- · Replies 1 ·
Graduate The reciprocal expectation value
- ian2012
- · Replies 7 ·
Graduate Compute SHO Propagator: Eigenfunction Expansion
- chafelix
- · Replies 1 ·
Graduate Solving an Interesting Problem with Two Hermitian Operators
- chafelix
- · Replies 6 ·
Graduate Does an elementary particle move continuously or in discrete quanta?
- JerryMac
- · Replies 14 ·
Graduate Is the Heisenberg Uncertainty Principle about states or observations?
- edpell
- · Replies 1 ·
Graduate Potential energy in hydrogen atom
- qsa
- · Replies 15 ·
Graduate New limit on lorentz invariance violation
- connor415
- · Replies 2 ·
Graduate Analysis of time-dependent SE (infinite square potential)
- scorpion990
- · Replies 7 ·
Graduate Can Two Hermitian Matrices be Simultaneously Diagonalized if They Commute?
- Mr confusion
- · Replies 6 ·
Graduate Confusing integral in Zee's QFT
- waht
- · Replies 2 ·
Graduate Dimensions of scalar field φ in Lagrangian density
- RedX
- · Replies 11 ·
Graduate What is the nature of matter if not particles or waves?
- query_ious
- · Replies 2 ·
High School If Electrons Aren't Waves, Then What's Waving?
- xMonty
- · Replies 4 ·
Graduate How are operator valued distributions defined?
- jostpuur
- · Replies 2 ·
Graduate Taking picture in atto second? Yes we did.
- eha
- · Replies 7 ·
Graduate Quantum entanglement, not that weird.
- JustinMarbutt
- · Replies 12 ·
Graduate What are Repulsive Casimir Forces?
- alexgmcm
- · Replies 4 ·
Graduate A question on eigenstates and operators
- vertices
- · Replies 3 ·
Graduate Hypothetical entanglement question
- Molecule
- · Replies 6 ·
Undergrad What are the fundamental forces involved in the chemical reaction?
- Pythagorean
- · Replies 6 ·
Graduate Bohr-Sommerfeld Quantization Rule for 3D Systems
- paweld
- · Replies 2 ·
Graduate How can the properties of the same element differ
- neelakash
- · Replies 7 ·
Graduate The ground state of a time-reversal invariant system must has zero momentum?
- wdlang
- · Replies 6 ·
Graduate Are energy eigenvalues always positive in the Schrödinger equation?
- oddiseas
- · Replies 1 ·
Graduate What does coherence mean for the annihilation operator eigenstates?
- pellman
- · Replies 12 ·
Graduate Spatio-temporal shape and spectral distribution of pulse
- vivhappyrom
- · Replies 1 ·
Graduate Preferred basis problem in many-worlds interpretation
- helenk
- · Replies 11 ·
Graduate Gravity as a cancellation force
- genphis
- · Replies 3 ·
Graduate Does H(r) Equal Hψ(r) in Quantum Mechanics?
- andyc100
- · Replies 2 ·
Graduate Partial reflection and FTL communication in QED
- Malakai
- · Replies 9 ·
Graduate Parity transformation of spinor in Weinberg equation 2.6.22
- ap_nhp
- · Replies 3 ·
Graduate Do we need quantum-classical correspondence?
- xylai
- · Replies 2 ·
Graduate Angular momentum and group representation
- paweld
- · Replies 3 ·
Graduate Vacuum Polarization as EM Wave.
- Mr i
- · Replies 1 ·
Graduate Tensor products and subsystems
- Fredrik
- · Replies 21 ·
Graduate Can virtual particles explain quantum phenomena?
- Tsunami
- · Replies 3 ·
Graduate Does light spreading contradict the attraction of photons in a laser?
- rhenretta
- · Replies 14 ·
High School Do our fingers ever touch electrons or nucleis?
- eha
- · Replies 1 ·
Graduate Playing with magnetic balls, and now I have a question
- rhenretta
- · Replies 9 ·
Graduate Formula for expectation value of raidous in Hydrogen atom
- paweld
- · Replies 9 ·
Graduate Why doesn't spinless wavefunction transform like a probability density?
- ginda770
- · Replies 11 ·
Graduate Understanding Electron Probability in Atom
- dschmidt12
- · Replies 7 ·
Graduate Maxwell propagator in Kaku's QFT book
- hyungrokkim
- · Replies 4 ·
Graduate What is the construction of gamma matrices and spinors in higher dimensions?
- ismaili
- · Replies 3 ·
Graduate Does wave-particle duality result from how we observe rather than nature itself?
- Nick1234
- · Replies 29 ·
Graduate Wave-Particle Duality: Physics Implications
- MiNiWolF
- · Replies 2 ·
High School Why does the uncertainty principle not apply to a running man?
- vntskr
- · Replies 5 ·
Graduate The Large Hadron Collider - Where is the particle?
- mintparasol
- · Replies 16 ·
Graduate Planck length and the speed of light
- helenk
- · Replies 1 ·
Graduate What is the meaning behind a gluon's color?
- Char. Limit
- · Replies 2 ·
Graduate Maxwell Equations: Radiation requires acceleration?
- 1Truthseeker
- · Replies 3 ·
Graduate How does spin entanglement work with three or more electrons?
- QuantumVegan
- · Replies 8 ·
Graduate Solving Schrodinger's Equation: Finite Jumps at Singular Points?
- RedX
- · Replies 1 ·
Graduate Lost in Symmetry and Super Symmetry
- 1Truthseeker
- · Replies 4 ·
Graduate Pauli spin matrices
- firoz.raj
- · Replies 1 ·
Graduate Efimov 3-body theory experimentally proven
- turbo
- · Replies 4 ·
Graduate Does anybody know if there are instances other than diffraction
- Neo_Anderson
- · Replies 3 ·
Graduate Finite and infinitesimal Unitary transformations
- mtak0114
- · Replies 8 ·
Graduate Theorem of quantum-mechanical version of Borromean rings finally proven
- mugaliens
- · Replies 1 ·
Graduate Do L² and r² Commute in Quantum Mechanics?
- dreamspy
- · Replies 5 ·
Graduate At what temperature do quantum effects become significant for a gas
- Signifier
- · Replies 3 ·
Graduate Wave Collapse and Degenerate States - A Quick Question
- BAnders1
- · Replies 1 ·
Graduate Detecting a photon in a box through gravitational or thermal effects
- Dmitry67
- · Replies 44 ·
Graduate Intuitive Analogy to describe QM
- Galteeth
- · Replies 1 ·
Graduate Molecular Vibration and Gas Temperature
- Wilko
- · Replies 10 ·
Graduate Amplitude paths and Markov processes
- wofsy
- · Replies 2 ·
Graduate Off-Diagonal Hamiltonian elements
- cowrebellion
- · Replies 3 ·
Graduate Matter wavelength and indeterminate of location and energy
- hubert_g
- · Replies 1 ·
Graduate Spherical harmonics and P operator
- paweld
- · Replies 8 ·
Graduate Is Decoherence the Solution to the Measurement Problem?
- Descartz2000
- · Replies 18 ·
Graduate Can we improve the Bohr model or is a new model needed for multi-electron atoms?
- MonsieurWise
- · Replies 19 ·
Graduate Probability of finding particle in half of a box for a given state
- trelek2
- · Replies 1 ·
High School Why does combining hydrogen atoms result in decreased energy?
- 6021023
- · Replies 11 ·
Graduate Quantum Arrow of Time Solution
- dmtr
- · Replies 39 ·
Graduate Massless Limit of Massive Field Theory: Right or Wrong?
- parton
- · Replies 1 ·
Graduate Singlet state like |e>= |+> |-> - |-> |+>
- shakespeare86
- · Replies 20 ·
Undergrad Is the Hall Effect Part of Quantum Physics?
- 6021023
- · Replies 1 ·
Graduate What Role Does Time Play in Physics and Its Influence on the Arrow of Time?
- surena1980
- · Replies 20 ·
High School Did Planck view light as a particle or a wave?
- 6021023
- · Replies 2 ·
Graduate Can Electrons Exist at Extreme Distances from Their Atomic Nucleus?
- sridhar10chitta
- · Replies 4 ·
Graduate No Absolute Stillness: Questions from New Forum Member Nick
- Nick1234
- · Replies 6 ·