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 Transition from Poisson bracket into Canonical Commutation Relations
- exponent137
- · Replies 2 ·
Graduate Computing the commutator [W^2, p^α] with Pauli-Lubanski vector
- noamriemer
- · Replies 9 ·
Undergrad Energy distribution, amplitude and frequency in wave vs particle models of light
- CallsignFrost
- · Replies 1 ·
Graduate Are Input Photons #2 and #3 Still Entangled After Going Through a Beam Splitter?
- StevieTNZ
- · Replies 4 ·
Graduate Are Electrons and Photons Like Water Molecules and Waves?
- thetexan
- · Replies 1 ·
Graduate CHSH and the triangle inequality
- gespex
- · Replies 4 ·
Graduate Would a particle at the edge of the universe have an infinite amplitude
- clearwater304
- · Replies 5 ·
Graduate Dyade Dirac Notation: Why Last Equation?
- LagrangeEuler
- · Replies 3 ·
Graduate Multiple quantum entanglements
- serp777
- · Replies 3 ·
Graduate Box^2 A_μ = J_μ ; [Dirac operator] ψ = 0 or not?
- Spinnor
- · Replies 2 ·
Graduate Separable state vs part of entangled state
- Fightfish
- · Replies 2 ·
Graduate Bare mass versus physical mass in a QFT model with external current
- giova7_89
- · Replies 3 ·
Graduate Weak field zeeman effect, why don't we still use degenerate perturbation theory?
- alemsalem
- · Replies 1 ·
Graduate Weinberg QFT - Inner product relations, Standard momentum, Invariant integrals
- Lakshya
- · Replies 2 ·
Graduate Photon wavefunction and localizability
- eoghan
- · Replies 7 ·
Undergrad Can wave theory explain the Compton effect?
- PrincePhoenix
- · Replies 4 ·
Graduate Binomial Expansion: Solve for L=Hbar*(l+1/2)
- perplexabot
- · Replies 2 ·
Graduate Why the De Raedt Local Realistic Computer Simulations are wrong
- DrChinese
- · Replies 82 ·
Graduate Is the Past Uniquely Defined in Quantum Mechanics?
- jmd_dk
- · Replies 3 ·
Graduate Schrodinger Equation in 3 dimension
- sciboudy
- · Replies 2 ·
Undergrad Can Superposition and Wavefunction Collapse be Visually Demonstrated?
- kyoto
- · Replies 1 ·
Graduate What does couples as the 4th component of a vector mean in the Dirac equation?
- xahdoom
- · Replies 1 ·
Graduate What is the minumum arrangement to cause decoherence?
- precisionart
- · Replies 9 ·
Graduate 'Physics of Quantum electronics vol.8 chap.5''
- marygreen
- · Replies 1 ·
Graduate Proving Bloch's Theorem
- naele
- · Replies 2 ·
Graduate Probabilistic quantum world and deterministic macro world?
- VikingF
- · Replies 3 ·
Undergrad Atoms at Absolute 0: Subatomic Kinetic Energy
- claytonh4
- · Replies 4 ·
Graduate Does the double-slit experiment show wave function collapse?
- ace frehley
- · Replies 2 ·
Graduate Field transformation under Lorentz group
- eoghan
- · Replies 1 ·
Graduate Are Quantum Energy and Gravity the Same Phenomenon?
- sirchick
- · Replies 3 ·
Graduate Why Do Perfect Theories Never Match Experimental Results Exactly?
- ndung200790
- · Replies 7 ·
Graduate Arising of exp(-ipx) in QM in quantum field theory
- exponent137
- · Replies 6 ·
Graduate How are entangled particles separated/distinguished?
- San K
- · Replies 2 ·
Graduate Status of Hawking Hartle no boundary proposal
- Naty1
- · Replies 3 ·
Graduate Wedge product in tensor notation
- praharmitra
- · Replies 1 ·
Graduate Overlap integral of harmonic oscillator wave functions
- jfy4
- · Replies 5 ·
Graduate Photon coherence time as the wavepacket length and dephasing
- benway
- · Replies 5 ·
Graduate Negative Energy and Mass Symmetry
- jbcool
- · Replies 1 ·
Graduate Can someone explain the Heisenberg Uncertainty Principle?
- spacecadet11
- · Replies 1 ·
Undergrad Regarding pair production and annihilation
- Squall94
- · Replies 3 ·
Graduate Ladder Operators for Harmonic Oscillator Excited States
- khemist
- · Replies 8 ·
Graduate How does the Feynman-Kac formula give the partition function for a Bose gas?
- csopi
- · Replies 1 ·
Graduate Is there a quantum computing model that allows you to add different states?
- IttyBittyBit
- · Replies 1 ·
Graduate Why we know spin vector is an axial vector?
- ndung200790
- · Replies 5 ·
Graduate Why Does the Path Integral in Quantum Mechanics Include an Imaginary Unit 'i'?
- unchained1978
- · Replies 1 ·
Graduate The Unruh effect and vacuum states
- asimov42
- · Replies 8 ·
Graduate Factor in equation (3.49) of Peskin and Schroeder
- jmlaniel
- · Replies 2 ·
Graduate Mass defect - where does it go to?
- Michio Cuckoo
- · Replies 1 ·
Graduate Schroedinger boundry equation: Smooth?
- ShamelessGit
- · Replies 2 ·
Graduate Time in QFT and in special relativity
- exponent137
- · Replies 6 ·
Graduate Is Impulse a Discrete Observable in Physics?
- the_pulp
- · Replies 1 ·
Graduate Schrodinger's equation and the finite well(conceptual)
- hover
- · Replies 2 ·
Graduate Understanding Electron Mass in Classical and Quantum Electrodynamics
- catlike
- · Replies 1 ·
High School Do atoms get bigger or further apart as an object's temperature increases?
- Marshallaw4
- · Replies 3 ·
Graduate Deriving the Born Rule from the operator-centric formulation
- Hurkyl
- · Replies 10 ·
Graduate Polarisation Rotators and Measurement
- StevieTNZ
- · Replies 2 ·
Graduate Detection of a Quantum Measurement
- chrisphd
- · Replies 2 ·
Graduate Free energy perturbation expansion in Landau's statistical physics
- mSSM
- · Replies 2 ·
Undergrad Accuracy of double slit experiment video for AP physics
- physicsdreams
- · Replies 8 ·
Graduate Lorentz transformation in Coulomb gauge
- GreenGiant
- · Replies 2 ·
Graduate Why photons are free from decoherence?
- gioialorusso
- · Replies 2 ·
Graduate Problem with density matrix
- Jano L.
- · Replies 19 ·
Graduate Why is this a definition of the partition function?
- VortexLattice
- · Replies 1 ·
Graduate Exchange Forces and Symmetrization of Fermions/Bosons
- zmitchel
- · Replies 1 ·
Graduate Fermionic Fock space superselected?
- Jazzdude
- · Replies 9 ·
Undergrad Finding photon energy from electron energy levels
- sharpielife
- · Replies 1 ·
Graduate Heiseinbeg's Uncertainty Priciple and Schrodinger's eqt
- Yh Hoo
- · Replies 2 ·
Undergrad de Broglie wavelength of 40 eV electron
- sharpielife
- · Replies 4 ·
Graduate Mechanism of Bond Energy Absorption
- SonOfADunn
- · Replies 2 ·
Graduate Wavefunction from probability, OR current from charge density?
- jjustinn
- · Replies 7 ·
Graduate Is Thomas Campbell's Interpretation of the Double Slit Experiment Valid?
- Fuzzystuff
- · Replies 13 ·
Graduate Fine structure constant and perturbation theory
- asimov42
- · Replies 1 ·
Graduate Decoherence Time Scale for Different Qubit Realizations
- gioialorusso
- · Replies 4 ·
Undergrad Do energy bands belong to individual atoms or to the whole solid?
- tomz
- · Replies 6 ·
Graduate How does a free particle behave in quantum mechanics?
- sciboudy
- · Replies 18 ·
Graduate Static electric field in Quantum Field Theory?
- Spinnor
- · Replies 5 ·
Graduate Need Help Understanding a Quantum Mechanics Equation
- Bootsie
- · Replies 2 ·
Graduate Are Majorana fermions confirmed in this experiment?
- Vorde
- · Replies 7 ·
Graduate Why is Q=q^{N} only valid for distinguishable particles?
- luitzen
- · Replies 2 ·
Graduate Does the position-momentum uncertainty product depend on velocity?
- sharma_satdev
- · Replies 12 ·
Graduate Bound state of two micro black holes: methods beyond the Schrödinger equation
- nightbat
- · Replies 8 ·
Graduate What does probability amplitude mean
- latnoa
- · Replies 8 ·
Graduate Probability of an observable
- radinic
- · Replies 1 ·
Graduate Planck distance and less dimensional gravity
- exponent137
- · Replies 2 ·
Graduate Feyeman lectures on anti-particles
- Paul77
- · Replies 4 ·
Graduate Energy quantization and energy levels
- joris_pixie
- · Replies 2 ·
Undergrad Most accurate way to visualise an atom.
- CarlosLara
- · Replies 2 ·
Graduate What does the Schrödinger equation mean and how does half-integer spin work?
- Swankie
- · Replies 2 ·
Graduate Sum over histories and double slit?
- beatlemaniacj
- · Replies 5 ·
Graduate Why don't proton and antiproton fully annihilate into pions?
- shahbaz.c
- · Replies 2 ·
Graduate Vacuum energy and principle of uncertainty
- exponent137
- · Replies 9 ·
Graduate Tendency to drop down to a lower energy state.
- CarlosLara
- · Replies 2 ·
Graduate Single-slit interference with alternating path modulation
- San K
- · Replies 6 ·
Undergrad Is K*T Equal to hv in Thermal Equilibrium?
- Chemist20
- · Replies 1 ·
High School Do atoms age or decay over time?
- aditya23456
- · Replies 7 ·
Undergrad What are the sources of energy in a rigid rotator?
- sharma_satdev
- · Replies 2 ·
Graduate Does every quantum field have a non-zero groundstate?
- a dull boy
- · Replies 20 ·
Graduate Configuration space vs physical space
- Demystifier
- · Replies 70 ·
Graduate Can electron motion through a medium explain two-slit interference?
- CoreyCapone
- · Replies 4 ·
Graduate Compton Effect: Electron Ejection & Potential Energy
- vin300
- · Replies 2 ·