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 Why Does the Kraus Map Need to be Completely Positive?
- Henriamaa
- · Replies 1 ·
Graduate Finding probability of one state in another
- rida
- · Replies 2 ·
Graduate Why don't we perceive systems during decoherence?
- StarsRuler
- · Replies 1 ·
Graduate The Time Symmetry Debate in Quantum Theory
- TrickyDicky
- · Replies 165 ·
Graduate What is the QED LSZ-reduction formula?
- center o bass
- · Replies 1 ·
Graduate Where can I find resources to learn the math behind quantum mechanics?
- PhysicsDad
- · Replies 12 ·
Graduate Are quantum mechanical effects faster than speed of light?
- kannan_k
- · Replies 26 ·
Graduate QED running coupling definition.
- center o bass
- · Replies 2 ·
Graduate Are Artificial Magnetic Monopoles Redefining Maxwell's Equations?
- Charles Wilson
- · Replies 1 ·
Graduate Does mass depend on energy scale?
- geoduck
- · Replies 1 ·
Graduate What are some recommended free Quantum Optics PDFs for learning and reference?
- Spinnor
- · Replies 3 ·
Graduate Ward identity from Ward-Takahashi identity?
- center o bass
- · Replies 2 ·
Graduate Quantum eraser and the experimenter's retina?
- garyrob
- · Replies 2 ·
Graduate What are the properties and applications of ferromagnetic thin films?
- vinzie
- · Replies 6 ·
Graduate Why Lagrangian is Used in Quantum Field Theory
- lonewolf219
- · Replies 5 ·
Graduate Entanglement Hypothesis by de Broglie in 1935
- genefalk
- · Replies 5 ·
Graduate General Gauge Invariance Problem
- llorgos
- · Replies 2 ·
Graduate Wave Function Collapse and Entropy
- stevendaryl
- · Replies 49 ·
Graduate Time Evolution of Measurables(Hamiltonian)
- aim1732
- · Replies 2 ·
Graduate Looking for mentor to answer QFT questions during 8-week REU
- lonewolf219
- · Replies 2 ·
Graduate Hamiltonian of linear harmonic oscilator
- LagrangeEuler
- · Replies 12 ·
Graduate Do you have any interest in Quaternionic Quantum Mechanics?
- lee.spi
- · Replies 15 ·
Graduate Quick question about Kronecker delta function
- Cogswell
- · Replies 2 ·
Graduate Is it possible to create a higher energy photon from two lower ones?
- zrek
- · Replies 11 ·
Graduate Bell Proof Against Hidden Variables in EPR
- msumm21
- · Replies 1 ·
Graduate Real Time Entanglement from the Zeilinger Group
- Charles Wilson
- · Replies 12 ·
Graduate Definition of a wavefunction as a function of position.
- 71GA
- · Replies 23 ·
Graduate Is coherence a single photon phenomenon?
- Einstein Mcfly
- · Replies 4 ·
Graduate Probability Greater than 1 in λφ^4 Theory
- geoduck
- · Replies 1 ·
Graduate Could packet round-trip times be an analog to qubits?
- MerryMoose
- · Replies 2 ·
Graduate I need all the information about theHeisenberg's uncertainty principle
- lee.spi
- · Replies 13 ·
Graduate Can Individual Gluons Be Extracted from a Nucleus?
- Physicist50
- · Replies 3 ·
Graduate What is the difference between quantum mechanics and QFT?
- lonewolf219
- · Replies 6 ·
Graduate Photon emission by an excited hydrogen atom
- Ruslan_Sharipov
- · Replies 4 ·
Graduate Classical Limit formula for differential cross section for Hard Sphere
- aim1732
- · Replies 7 ·
Graduate Common eigenvalues for two states or two bases of same state?
- nomadreid
- · Replies 4 ·
Undergrad Why does vacuum have properties?
- jijopaul
- · Replies 3 ·
Graduate Is E Always Greater Than V(x) in the Time-Independent Schrodinger Equation?
- robotopia
- · Replies 1 ·
Graduate (Peskin and Schroeder) Numerator of vertex correction
- ndcat10
- · Replies 1 ·
Graduate Statistical Operator: Explaining Temperature in Physics
- LagrangeEuler
- · Replies 1 ·
Graduate Quasi-historical question about black body radiation
- Physics Monkey
- · Replies 6 ·
Graduate Shouldn't the mass of an electron be uncertain?
- gamow99
- · Replies 1 ·
Graduate Unitarity angular momentum operators
- Yoran91
- · Replies 5 ·
Graduate Basic question on quantum mechanics and choice
- entropy15
- · Replies 10 ·
Graduate Cassimir's Dark Energy Plate Experiment
- JasonSouthworh
- · Replies 3 ·
Graduate Can UV photons spontaneously convert into IR photons, and vice versa?
- edevere
- · Replies 11 ·
Graduate How meaurements increase entropy?
- StarsRuler
- · Replies 9 ·
Graduate Degenerate perturbation theory degeneracy not lifted by perturbation
- tamaghna
- · Replies 8 ·
Graduate Http:www.univie.ac.at/qfp/publications3/pdffiles/1999-10.pdf real?
- StarsRuler
- · Replies 7 ·
Graduate So what exactly is entanglement?
- daveyrocket
- · Replies 7 ·
Graduate Non-locality and the Bekenstein bound?
- nomadreid
- · Replies 3 ·
Graduate Neutron Spin Time Evolution in Interferometer
- hpar
- · Replies 3 ·
Graduate Can Entropy Decrease After a Projective Measurement?
- StarsRuler
- · Replies 3 ·
Graduate Quantum Behavior As Extreme Classical Behavior
- sanman
- · Replies 30 ·
Graduate If decoherence matters in 2 different observables
- StarsRuler
- · Replies 3 ·
Graduate Field transformations in Weinberg's QToF
- brodekind
- · Replies 3 ·
Graduate Spectrum of the Hamiltonian in QFT
- unchained1978
- · Replies 5 ·
Graduate Vacuum expectation values of combinations of ##a^\dagger## and ##a##
- LayMuon
- · Replies 2 ·
Graduate Wick theorem for particle-antiparticle annihilation
- LayMuon
- · Replies 6 ·
Graduate Four Handed Entanglement - With a Catch
- Charles Wilson
- · Replies 3 ·
Graduate Why Do We Need Fields as Annihilation & Creation Operators?
- Ray
- · Replies 17 ·
Undergrad Is it possible to slow down/stop the light?
- Requadin
- · Replies 5 ·
Graduate How Does Quantum Entanglement Affect Electron Spin Measurements?
- bardeen
- · Replies 2 ·
Graduate Field Theory Partition Function
- unchained1978
- · Replies 2 ·
Graduate How does the Klein-Gordon Lagrangian relate to the equations of motion?
- nylonsmile
- · Replies 11 ·
Graduate How to solve for allowed energies with the WKB approximation?
- Hypercubes
- · Replies 2 ·
Graduate A question about optical theorem
- ndung200790
- · Replies 6 ·
Graduate A modified double slit screen scenario- what would happen?
- bcrelling
- · Replies 4 ·
Graduate The Quasi Classical Approximation(Landau Lifshitz)
- aim1732
- · Replies 1 ·
Graduate Hankel Functions: Solutions to Cylindrical Wave Equation
- aim1732
- · Replies 7 ·
Graduate Relation between mass and wave function
- nil1996
- · Replies 5 ·
Graduate A single atom in a cold, closed, vacuum system.
- nukapprentice
- · Replies 11 ·
Graduate How Do We Correctly Calculate the Distribution of Bosons Among Energy Levels?
- ShayanJ
- · Replies 1 ·
Graduate Double Harmonic Approximation IR intensties
- DinosaurChemi
- · Replies 1 ·
Graduate Trying to wrap my brain around entanglement-superposition
- drschools
- · Replies 3 ·
Graduate Why does the phase-space contour integral equal action?
- Glidos
- · Replies 2 ·
Graduate Field and conjugate independent?
- geoduck
- · Replies 4 ·
Graduate Does gravity break down in the big bang?
- daanaerts
- · Replies 6 ·
Graduate Acceleration operator and the electron in a hydrogen atom
- QuasiParticle
- · Replies 4 ·
Graduate Wavepacket incident on a potential step
- id00022
- · Replies 7 ·
Graduate Existence of Pure Quantum States
- msumm21
- · Replies 13 ·
Graduate Representation of linear operator using series ?
- V0ODO0CH1LD
- · Replies 2 ·
Graduate Number of possible wavefunctions only countably infinite?
- nomadreid
- · Replies 32 ·
Graduate Is dBB reproducing quantum results ?
- jk22
- · Replies 17 ·
Graduate Pulling out partial derivatives?
- Cogswell
- · Replies 3 ·
Graduate Uncertainty Relation between Lx and Ly
- *FaerieLight*
- · Replies 14 ·
Graduate Can Singlets be Prepared with a Preferred Direction?
- anorlunda
- · Replies 2 ·
Graduate Quantum teleportation and the density matrix
- VantagePoint72
- · Replies 1 ·
Undergrad Photocurrent and frequency of incident light
- ViolentCorpse
- · Replies 2 ·
Graduate Is Squaring the Momentum Operator the Same as Applying it Twice?
- Sylvia Else
- · Replies 3 ·
Graduate Transforming Representations of SO(3) to Act on Vectors?
- silverwhale
- · Replies 30 ·
Graduate What are raising & lowering operators
- Roodles01
- · Replies 1 ·
Graduate Matrix exponentiation using gsl library (Computational Quantum Mechanics)
- sijokjoseph
- · Replies 5 ·
Graduate Expectation value at ground state
- Roodles01
- · Replies 1 ·
Graduate Why doesn't one-photon-irreducible function have any pole at q^2=0?
- kof9595995
- · Replies 2 ·
Graduate What is the minimum observer energy?
- Jeff Rosenbury
- · Replies 3 ·
Undergrad Question about magnetic field generation by stream of electron
- rrosenthal
- · Replies 3 ·
Graduate Stability of atoms in QM / QED
- tom.stoer
- · Replies 6 ·
Graduate Time independant perturbation problem
- omoplata
- · Replies 3 ·
Graduate Molecular material ground state
- hokhani
- · Replies 5 ·