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 Understanding Reference Frames in Quantum Mechanics
- mhazelm
- · Replies 2 ·
Graduate Is Time Really Symmetrical in the Quantum World?
- kasse
- · Replies 1 ·
Graduate Velocity of Electrons in Hydrogen Atom
- cypherbane139
- · Replies 5 ·
Undergrad What is the magnetic quantum number and how does it relate to external magnetic fields?
- Nadeem1980
- · Replies 5 ·
Graduate Understanding Pauli Matrices and Rotations
- Lojzek
- · Replies 7 ·
Graduate Integral of a delta function from -infinity to 0 or 0 to +infinity
- maverick280857
- · Replies 31 ·
Graduate Was the original EPR paradox against uncertainty principle or Copenhagen interpretation?
- mritunjay
- · Replies 2 ·
Graduate What Is the Significance of Quark Spin in Quantum Physics?
- cam875
- · Replies 5 ·
Undergrad Planck's law and ultraviolet catastrophe
- kwuk
- · Replies 3 ·
Graduate Why are energy eigenstates time-independent if energy is definite?
- llamascience
- · Replies 6 ·
Undergrad Can we see individual photons and do they have dimensions?
- anantchowdhary
- · Replies 18 ·
Graduate Proving IN DIRAC THEORY Free Particles Possess Acceleration"
- GAGS
- · Replies 1 ·
Graduate Do Signal and Idler Photons from PDC Always Share Equal Energy?
- Demystifier
- · Replies 1 ·
Graduate Do Transition Dipole Moments Have Different Signs? Resolving a Contradiction
- noi_tseuq
- · Replies 3 ·
Graduate Is the singlet state just a special case of mixture?
- quantumphilosopher
- · Replies 1 ·
Graduate Densely defined operators of Fock space
- julian
- · Replies 2 ·
Graduate Gauge Boson Propagators in Spontaneously Broken Gauge Theories
- TriTertButoxy
- · Replies 1 ·
High School Longest photon wavelength observed?
- Loren Booda
- · Replies 15 ·
Graduate Wick rotation and contour integral
- koolmodee
- · Replies 4 ·
Graduate What do A* and A† mean in quantum mechanics notation?
- JasonJo
- · Replies 7 ·
Graduate Understanding Extra Internal Degree of Freedom from QM and SR
- cefarix
- · Replies 13 ·
Graduate Ground State Energy of an Electron
- jbowers9
- · Replies 4 ·
Graduate Paradox seemingly violating relativity
- JeremySchw
- · Replies 8 ·
Graduate How to dertermine the Hamiltonian matrix
- hxwgter
- · Replies 1 ·
Graduate Transformation of energy space to momentum space
- queries
- · Replies 2 ·
Graduate Why do we need mixed quantum states in experiments?
- Tac-Tics
- · Replies 3 ·
Graduate Crossing nodes of wavefunction
- DeShark
- · Replies 5 ·
Graduate Solutions of TISE - is it all about groping in the dark?
- DeShark
- · Replies 6 ·
Graduate Force on Walls of Rectangular Potential Box by Particle Inside
- maverick280857
- · Replies 11 ·
Graduate What is the Explanation for the Double Slit Experiment in Quantum Mechanics?
- wofsy
- · Replies 3 ·
Graduate Calculation of scattering amplitude ratio for two different angles
- GAGS
- · Replies 1 ·
Graduate Resonance states and complex energies
- ismaili
- · Replies 5 ·
Graduate Eigenkets of a function of a hermitian operator
- shehry1
- · Replies 3 ·
Graduate What does it mean to transmit classical information through a quantum channel?
- ppnl
- · Replies 1 ·
Undergrad Wave packet conceptual question
- musashi1029
- · Replies 3 ·
Undergrad Faster then the speed of light
- toxonic
- · Replies 8 ·
Graduate What is the solution for the quantum harmonic oscillator formula for nucleons?
- bluestar
- · Replies 8 ·
Graduate Off the mass shell and external fields
- ismaili
- · Replies 1 ·
Graduate Entanglement and the double slit experiment
- DougBTX2
- · Replies 4 ·
Graduate The Borderworld between Quantum and Classical Physics
- mea
- · Replies 15 ·
High School Can uncertainties become smaller in certain cases?
- kodek64
- · Replies 4 ·
Graduate Do particles or antiparticles go back in time in Feynman diagrams?
- Trip2
- · Replies 12 ·
Graduate Why does one photon conserve spin in 22Na beta decay to 21Ne?
- huyen_vyvy
- · Replies 1 ·
Undergrad Difference between a particle and a virtual particle
- Trip2
- · Replies 12 ·
Graduate What Do Feynman Diagrams Reveal About Time Reversibility?
- Trip2
- · Replies 8 ·
Graduate Double Slit Experiment: Accounting for Other Particle Interactions
- Tac-Tics
- · Replies 2 ·
Graduate Refraction due to attractive potential
- missmaria
- · Replies 1 ·
Graduate The necessity of the 2nd quantization?
- weejee
- · Replies 15 ·
Graduate Bound states for a half harmonic oscillator
- praharmitra
- · Replies 2 ·
Graduate Double-slit experiment - a couple of questions
- Pastel
- · Replies 24 ·
Graduate Dimension of Hilbert Space in Quantum Mechanics
- vinay uppal
- · Replies 7 ·
Graduate Dimensions and the Generating Functional
- TriTertButoxy
- · Replies 2 ·
Graduate Seven Questions for Quantum Physicists
- dron
- · Replies 40 ·
Graduate What is the Controversy Surrounding Retrocausality?
- Jimih
- · Replies 16 ·
Graduate Can Noncommutative Operators Be Integrated in Quantum Mechanics?
- mhill
- · Replies 1 ·
Graduate Check If Operator Is Hermitian: Real Eigenvalue Test
- kthouz
- · Replies 4 ·
Graduate How to get QFT operator expectation values?
- tim_lou
- · Replies 2 ·
Graduate Variational principle convergence
- Manchot
- · Replies 2 ·
Graduate Is light an electromagnetic radiation. If so< then isn't it casued by
- sudhirking
- · Replies 2 ·
Graduate E=1/n^2 (-13.6eV) for other one-electron atoms –ionized helium (Z=2),
- MIA6
- · Replies 1 ·
Graduate Is Radiative Loss Accounted for in the Usual Treatment of Compton Scattering?
- Marty
- · Replies 9 ·
Graduate Why Must Potential Energy V(x) Be Real in the Schrödinger Equation?
- Felicity
- · Replies 4 ·
Graduate Why does the Klein Gordon Lagrangian derivative give a factor of 2 that cancels the 1/2?
- flix
- · Replies 7 ·
Undergrad Difference between ionization energy and photoelectric effect?
- waterboy1234
- · Replies 2 ·
Graduate On General Measure of Entanglement
- krete
- · Replies 7 ·
Graduate Heisenberg Uncertainty Principal with regards to electron orbits
- ajassat
- · Replies 2 ·
Graduate Purely imaginary bound state wave functions?
- Einstein Mcfly
- · Replies 4 ·
Graduate How to calculate the many-body wavefunction
- unica
- · Replies 2 ·
Graduate HELP Can you find an electron in the exact middle of an S orbital?
- gomefun2
- · Replies 8 ·
Graduate How is light created and propagated at the quantum and wave level?
- GRB 080319B
- · Replies 32 ·
Graduate Fermi's Golden Rule and Density of States
- yaychemistry
- · Replies 8 ·
Graduate How does the delta function relate to the momentum operator in Dirac notation?
- dod13
- · Replies 7 ·
Graduate Why does the free particle wavefunction drop the Bexp(-ikx) term?
- Dizzle
- · Replies 15 ·
Graduate Coupled quantum harmonic oscillators
- dflake
- · Replies 1 ·
Graduate Is Wave-Particle Duality of Light a Misleading Concept?
- ronjanec
- · Replies 7 ·
High School What part of the atom creates light?
- azzkika
- · Replies 9 ·
Undergrad Can Antiparticles be Visualized in Particle Detectors?
- futebol2014
- · Replies 3 ·
Graduate Could we do QM without time evolution ?
- mhill
- · Replies 1 ·
Graduate Canonical quantization with constraints
- mhill
- · Replies 1 ·
Graduate Could Hidden Dimensions Explain the Twin-Slit Experiment?
- orbit-one
- · Replies 2 ·
Undergrad What were the implications of this quantum effect?
- madmike159
- · Replies 2 ·
Graduate Verifying a simple QFT derivation in Peskin's
- infiniteen
- · Replies 10 ·
Graduate Normalizing the Schrödinger Equation
- Desh627
- · Replies 3 ·
Graduate Can entangled particles maintain entanglement through a beam splitter?
- Degeneration
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Graduate Coincidence and Single Rate detection in Quantum Eraser experiments
- moving_on
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Graduate Gravity Propagation Experiment.
- GTrax
- · Replies 2 ·
Graduate Is Frequency a Fundamental Property of Signals or a Mathematical Construct?
- fisico30
- · Replies 6 ·
Undergrad Where can I start learning about quantum physics?
- thharrimw
- · Replies 13 ·
Graduate Proof of a commutator algebra exp(A)exp(B)=exp(B)exp(A)exp([A,B])
- ismaili
- · Replies 6 ·
Graduate Equating the uncertainty relations?
- ice109
- · Replies 2 ·
Graduate Proof that the eigenfunctions of a self-adjoint operator form a complete set.
- will.c
- · Replies 4 ·
Graduate Can non-commutative geometry describe phase space with Planck-scale uncertainty?
- mhill
- · Replies 1 ·
Graduate Prerequisites for studying relativistic quantum mechanics
- Domnu
- · Replies 2 ·
Graduate Can Two Photons Co-Orbit Stably Through Mutual Energy Attraction?
- Loren Booda
- · Replies 2 ·
Graduate (1/2,1/2) representation and photon
- ismaili
- · Replies 6 ·
Graduate Ground state energy of hydrogen atom
- Bosonichadron
- · Replies 2 ·
Graduate Spread fo wavefunctions - filling the universe?
- franoisbelfor
- · Replies 2 ·
Graduate Questions on Feynman's view on Double slit experiment
- suomi
- · Replies 15 ·
Graduate What is the Pauli-Lubanski Pseudo-Vector and How Can its Invariance be Proven?
- udaraabey
- · Replies 4 ·
Graduate Finding Simplicity in Summation Expressions
- Final
- · Replies 3 ·