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 Second Quantized Minimal Basis Hamiltonian of H2
- Physics Learner
- · Replies 1 ·
Graduate Is there a principle of stationary action for QFT?
- jordi
- · Replies 8 ·
Graduate Do we need stochasticity in a discrete spacetime?
- Ali Lavasani
- · Replies 2 ·
Graduate Can we create a random variable using QED effects?
- Ali Lavasani
- · Replies 25 ·
Undergrad Does the Compton wavelength put a limitation on position measurements?
- Ali Lavasani
- · Replies 5 ·
Graduate How to mathematically write down a probability of measuring a particle
- fluidistic
- · Replies 1 ·
Undergrad Would these (unrealistic) conditions imply gravitons existed?
- NotASmurf
- · Replies 3 ·
Graduate Calculating transition rate between nljm resolved states
- Khashishi
- · Replies 1 ·
Graduate Bell state notation for photon polarization entanglement
- Joao
- · Replies 1 ·
Graduate Regarding the Born approximation
- Kontilera
- · Replies 1 ·
Graduate What is the relationship between angular momentum and energy in electrons?
- DiracPool
- · Replies 1 ·
Graduate Photons interacting with multiple matter particles
- muppet
- · Replies 1 ·
Graduate Water molecule absorbing radiation (or not?)
- mikeph
- · Replies 1 ·
Graduate Matriz Lz, m=2, but in x,y,z basis
- alejandrito29
- · Replies 1 ·
Graduate Rayleigh Ritz with two Particles
- wduff
- · Replies 1 ·
High School Is this a good way of "dumbing down" superposition?
- Bianca Meske
- · Replies 2 ·
Graduate Why Are My Tensor Products Not Adding Up Correctly?
- Jim Kata
- · Replies 1 ·
Graduate What happens if electrons pass through a second double-slit after measurement?
- decoherent
- · Replies 1 ·
Graduate Rearranging the doulbe slit experiement?
- jimjones
- · Replies 1 ·
High School Variations of the Double Slit?
- skewzme
- · Replies 30 ·
Graduate Nonclassicality described mathematically
- jlcd
- · Replies 6 ·
Graduate How, and in what atoms does the Lamb shift occur?
- Ali Lavasani
- · Replies 8 ·
Undergrad Choosing the eigenvector stochastically
- Mentz114
- · Replies 1 ·
Graduate Why do two QHOs generate angular momentum operators?
- nateHI
- · Replies 1 ·
Graduate Do different paths of an electron interfere with each other?
- haael
- · Replies 1 ·
Graduate Spatial linewidth and density matrix
- KFC
- · Replies 1 ·
Undergrad Sending a cryptographic key faster than the speed of light
- Lars278
- · Replies 5 ·
Graduate Schrödinger's equation: a diffusion or a wave equation?
- fluidistic
- · Replies 4 ·
Graduate Measuring Quantum Vacuum Fluctuations
- SteveKlinko
- · Replies 21 ·
Graduate Why localized states are eigenstates in an infinite potential lattice
- Lebnm
- · Replies 4 ·
Graduate What Are the Missing Links in Enrico Fermi's Beta-Decay Theory?
- Rob S
- · Replies 4 ·
Graduate Quantum statistical canonical formalism to find ground state at T
- Luqman Saleem
- · Replies 3 ·
Undergrad Griffiths example 4.3: expectation value of Sx with cosine terms
- Sparky_
- · Replies 3 ·
Undergrad Which operator for reflection in quantum mechanics?
- Amentia
- · Replies 7 ·
Undergrad Wave function of particle / quantum field in space, also in time?
- Silvio Macedo
- · Replies 1 ·
Undergrad Are EM fields clouds of photons?
- w5dxp
- · Replies 10 ·
Undergrad How does the collision between two atoms work?
- Ali Lavasani
- · Replies 8 ·
Graduate Unsure about a part of quantum physics
- 247a
- · Replies 1 ·
Graduate Learning Pauli's spin-1/2 theory and spinors from QED background
- sam guns
- · Replies 1 ·
Graduate Source material on how Planck came up with h
- marcus
- · Replies 1 ·
Graduate Spin Coupling, Matrix Building
- sol66
- · Replies 1 ·
Graduate Charles Stross and Quantum Teleportation
- CJames
- · Replies 1 ·
Graduate Photon with spin 1. But it only has two projection along z. Why?
- xfshi2000
- · Replies 1 ·
Graduate When to Choose Between Operators for Theoretical Calculations in Experiments?
- nonequilibrium
- · Replies 1 ·
Graduate One atom v.s. atoms? (solved by schrodinger equation.)
- xylai
- · Replies 1 ·
Graduate State Kets in QM and F. Path Integral
- Sina
- · Replies 1 ·
Graduate Quantum mechanical measurement (schrodinger's cat)-
- mritunjay
- · Replies 1 ·
Graduate My New Quantum Mechanics video
- Eugene381
- · Replies 1 ·
Graduate Can Quantum Mechanics Explain Elastic Collisions Between Non-Interacting Bodies?
- LukeD
- · Replies 1 ·
Graduate Is ZPE of an electron in an atom obtained intrinsically or extrinsically
- clearwater304
- · Replies 1 ·
Graduate How does Bob identify and apply the unitary operation in quantum teleportation?
- al onestone
- · Replies 1 ·
Graduate Understanding Bohr Theory (Wavelengths for Electron States)
- Xcellerator
- · Replies 1 ·
Undergrad Why do hybridized orbitals have different shapes than their constituent orbitals?
- Harmony
- · Replies 1 ·
Graduate Understanding Energy States and Population Distribution in Thermal Equilibrium"
- amph1bius
- · Replies 1 ·
Graduate QED photon vs photon as particle
- neworder1
- · Replies 1 ·
Graduate For all you Math / QM freaks out there
- Edgardo
- · Replies 1 ·
Graduate Definition of (quantum) information?
- nomadreid
- · Replies 3 ·
Graduate Uncertainty versus indeterminism: formulation?
- nomadreid
- · Replies 3 ·
Graduate T-symmetry (string theory) for minimum length?
- nomadreid
- · Replies 2 ·
Graduate How Does Light Localization Relate to the Heisenberg Uncertainty Principle?
- ecnyx
- · Replies 1 ·
Graduate Schrodinger's Cat and Leonard Susskind
- bhobba
- · Replies 1 ·
Undergrad Why do transmission lines reflect waves at discontinuities?
- KoussalyaBalu
- · Replies 1 ·
Graduate Question in Principles of Quantum Mechanics by Shankar
- wbphysics
- · Replies 1 ·
Graduate Stern-Gerlach experiment with orthogonal spin detector
- msumm21
- · Replies 1 ·
Graduate Eigenfunction, Eigenvalue, Wave Function and collapse
- birulami
- · Replies 1 ·
Graduate Why would FTL not be possible even in a noiseless place?
- San K
- · Replies 1 ·
Graduate Does local MWT require hidden variables?
- colorSpace
- · Replies 1 ·
Graduate Does Renormalisability Depend on Spin in Quantum Field Theory?
- ismaili
- · Replies 1 ·
Graduate What Causes Divergences in QFT?
- eljose
- · Replies 1 ·
Graduate Double Slit - Post Incident Detection
- simplyred
- · Replies 1 ·
Graduate How to define spin in quantum field theory on curved spacetime
- paweld
- · Replies 1 ·
Graduate Treating the Observer as a Quantum Object: Implications and Considerations
- Eynstone
- · Replies 1 ·
Graduate Loop order vs coupling order in conventional renormalization
- center o bass
- · Replies 1 ·
Graduate Superrenormalizable phi cubed theory
- LAHLH
- · Replies 1 ·
Graduate What is the true meaning of weak measurements in quantum mechanics?
- Demystifier
- · Replies 1 ·
Graduate Estimating size of loop integrals
- RedX
- · Replies 1 ·
Graduate What Are the Limitations of Multiplying Delta Functions in Quantum Mechanics?
- cjellison
- · Replies 1 ·
Graduate Asymptotic perturbation theory
- qtm912
- · Replies 1 ·
Graduate Wick rotation justification in path integrals without poles
- TriTertButoxy
- · Replies 1 ·
Graduate Hans Dehmelt's Refutation of Bohr's Claim: The Impossible Made Possible
- JohnBarchak
- · Replies 1 ·
Graduate The Quantum field’s effect on Virtual Particles
- Andrew Bone
- · Replies 1 ·
Graduate Quantum states as L^2 functions
- schieghoven
- · Replies 1 ·
Graduate Perturbation theory - need a couple of articles
- Evgn
- · Replies 1 ·
Graduate Wigners Friend where is the paradox?
- ManyNames
- · Replies 3 ·
Graduate Why can't non-renormalizable theories use self-consistent mass equations?
- eljose
- · Replies 1 ·
Graduate Extending Shannon's Ideas: The Evolution of Information in Quantum Mechanics
- sirchasm
- · Replies 1 ·
Undergrad What is the Basis of a Composite System?
- Lebnm
- · Replies 12 ·
Graduate Entropy of Reeh-Schlieder correlations
- arpharazon
- · Replies 1 ·
Graduate The Pauli Principle and the Wavefunction of Two Particles in a Ring
- Chemist20
- · Replies 1 ·
Graduate What is non/perturbative vacuum
- Neitrino
- · Replies 1 ·
Graduate Variational Principle on First Excited State
- boyu
- · Replies 1 ·
Graduate Path Integrals and Non-Abelian Gauge Theories
- BenTheMan
- · Replies 1 ·
Graduate What Properties Can Become Entangled When Atoms Interact?
- idea2000
- · Replies 1 ·
Graduate Standard perturbation theory - what exactly is meant?
- omg!
- · Replies 1 ·
Graduate Are van der Waals forces the fundamental basis for the Casimir effect?
- alxm
- · Replies 1 ·
Graduate Spectroscopy and Russell-Saunders coupling
- Amok
- · Replies 1 ·
Graduate Difference between a classical and quantum field theory?
- gato_
- · Replies 1 ·
Graduate Solving S.E. for rigid rotor (asymmetric top)
- christianjb
- · Replies 1 ·
Graduate Planck's assumption and Uncertainty principle
- kevin0960
- · Replies 1 ·
Graduate Is the Källen-Lehmann Representation a Feature of Quantum Field Theory?
- lonelyphysicist
- · Replies 1 ·