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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Undergrad Narrow slits causes a diffraction pattern
- Tac-Tics
- · Replies 2 ·
Graduate Calculating Inner Products of Spinors for QFT
- CompuChip
- · Replies 5 ·
Graduate De Broglie Waves: Understanding Wave-Particle Duality
- Vinu90
- · Replies 1 ·
Undergrad Red and blue shifts of radiation approaching and receding from a moving atom
- cks
- · Replies 2 ·
Graduate Are Hilbert spaces uniquely defined for a given system?
- diegzumillo
- · Replies 2 ·
Graduate Could positrons be electrons from the future traveling back in time?
- ensabah6
- · Replies 3 ·
Graduate Classical vs Quantum Electromagetism
- LarryS
- · Replies 1 ·
Graduate How useful would a metric independant basis be?
- CPL.Luke
- · Replies 3 ·
Graduate How Does the Wavefunction Behave at an Infinite Potential Barrier?
- ballzac
- · Replies 4 ·
Graduate Coherent States of the Quantum Harmonic Oscillator
- arhanbezbora
- · Replies 5 ·
Graduate Complex conjugate of wave function
- Amith2006
- · Replies 4 ·
Graduate Does collapse violate exchange symmetry?
- Demystifier
- · Replies 6 ·
Graduate What does a single photon look like
- quasar987
- · Replies 34 ·
Undergrad Question on electron orbitals and wavelengths?
- Austin0
- · Replies 16 ·
Graduate Completeness of the Number States
- afrano
- · Replies 4 ·
Graduate Light emission/absorption revisited by chemical thermodynamics
- fred_run
- · Replies 1 ·
Graduate Planck Scale and Unification of Forces- new research studies
- dimmedlight
- · Replies 2 ·
Graduate Randomness in Quantum Physics
- kdgloeckner
- · Replies 26 ·
Graduate Deriving hydrogen energy levels from Bohr radius and Coulomb's law
- mIKEjONES
- · Replies 1 ·
Graduate What Happens to the Uncertainty Principle at Absolute Zero?
- andrewm
- · Replies 13 ·
Graduate Hydrogen Atom Wavefunction Boundary conditions
- Chris333
- · Replies 1 ·
Graduate Are Fock states, field operators, and the Lagrangian the main concepts in QFT?
- MontgomeryWes
- · Replies 3 ·
Graduate How do virtual quarks contribute to baryon mass while conserving energy?
- stevebd1
- · Replies 2 ·
Graduate What are the implications of light having both wave and particle properties?
- SimonA
- · Replies 2 ·
Graduate Similarity vs. Unitary Transformations
- Amith2006
- · Replies 5 ·
Graduate Particle oscillating between two wells
- maverick280857
- · Replies 2 ·
Graduate What is the physical significance of the commutator in the Virial Theorem?
- maverick280857
- · Replies 1 ·
Graduate Questioning the Propagator: Diagonal or Not?
- sumeetkd
- · Replies 2 ·
Undergrad Photons and gases (pressure and gravity)
- Дьявол
- · Replies 8 ·
Graduate [Q]Hamiltonian of many body problem.
- good_phy
- · Replies 1 ·
Graduate What can be done when eigenvalues of a Non Hermitian Hamiltonian are complex?
- Physicslad78
- · Replies 9 ·
Graduate Number of bound states for a delta function potential
- runninglow
- · Replies 2 ·
Graduate Normalized momentum eigenfunctions, probability current, and two-particle Hamiltonians
- good_phy
- · Replies 2 ·
Structure of the wave function space F
- norbert
- · Replies 3 ·
Graduate QM Inconsistency: Friend's Thought Experiment
- michael879
- · Replies 8 ·
Graduate Why does angular momentum conservation prevent photon absorption in 1D potential wells?
- emperrotta
- · Replies 1 ·
Graduate Where can I find detailed description of cononical quantization?
- Leamas
- · Replies 4 ·
Graduate What happens during a change in orbital state?
- buffordboy23
- · Replies 2 ·
Graduate [Q] Sign of wavefunction in PIB
- Alice Jin
- · Replies 9 ·
Graduate What Are Some Common Misconceptions About Quantum Mechanics?
- unseensoul
- · Replies 43 ·
Graduate How can get the eigenvalues of the two spin entangle
- nicxm
- · Replies 1 ·
Graduate The Lorentz force derived from the Klein Gordon equation
- Hans de Vries
- · Replies 2 ·
Graduate Negative energy solutions - Dirac equation
- hendriko373
- · Replies 3 ·
Graduate How do we define a wave function?
- andrewhei
- · Replies 4 ·
Graduate Calculate Spin Operators from a Spinor
- eyalleiz
- · Replies 2 ·
Graduate Composite Bosons: Same State? Fermion Implications
- bsaucer
- · Replies 4 ·
Graduate Why does total J² commute with individual spin components?
- KFC
- · Replies 5 ·
Graduate Particles being in more than one place at once.
- jreelawg
- · Replies 6 ·
Graduate Quantum particle passes over a potential drop
- Verne
- · Replies 2 ·
Undergrad Normalization and singularities
- diegzumillo
- · Replies 2 ·
Graduate What are the normalizations constants of psi(x) in a finite potential box?
- j-lee00
- · Replies 2 ·
Graduate Discrete energy states (explanations in QFT?)
- tim_lou
- · Replies 2 ·
Graduate What is the difference between eigenfunctions and eigenvectors?
- Amith2006
- · Replies 1 ·
Graduate Why use tensor operators for angular momentum in quantum mechanics
- KFC
- · Replies 3 ·
Graduate Can higher-rank tensors be written as matrices?
- KFC
- · Replies 4 ·
Graduate Harmonic oscillator asymptotic wavefunction derivation
- good_phy
- · Replies 3 ·
Graduate Quantum Computation: A Single Qubit's Infinite Possibilities
- Amith2006
- · Replies 1 ·
Graduate Why use parity operators if we already know a function's parity
- good_phy
- · Replies 5 ·
Graduate What is vacuum polarization and vacuum de-polarization ?
- PJ2001
- · Replies 5 ·
Graduate Questions about quantum field theory
- Fredrik
- · Replies 11 ·
Graduate [Q]Conserative theorem and parity
- good_phy
- · Replies 3 ·
Graduate Formalism and Angular Momentum Expectation Values
- brooke1525
- · Replies 1 ·
Graduate What is the interpretation of a mass term in field theory?
- parton
- · Replies 6 ·
Graduate Quantum state: how many bases?
- fisico30
- · Replies 3 ·
Graduate Quantum Field Theory in Curved Spacetime?
- asimov42
- · Replies 13 ·
Graduate Question regarding a two particle system
- armis
- · Replies 11 ·
Graduate Why do antiparticles annihilate on contact with normal matter?
- physicophile
- · Replies 6 ·
Graduate Quantum logic gate measurement?
- nfelddav
- · Replies 2 ·
Graduate [Q]Time deviation of expectation value
- good_phy
- · Replies 2 ·
Graduate Vector currents, vector fields and bosons
- Manilzin
- · Replies 2 ·
Graduate Divergences in the sense of QFT
- mhill
- · Replies 2 ·
Graduate Time Evolution of Gaussian Wave packets
- thegaussian
- · Replies 7 ·
Graduate Operators having Hermitian/Antihermitian part?
- afrano
- · Replies 2 ·
Undergrad Difference between sigma subscript and superscript indices
- lour
- · Replies 6 ·
Graduate What determines if a photon is reflected, transmitted or absorbed?
- playmesumch00ns
- · Replies 5 ·
Graduate Why doesn't hydrogen energy depend on l, only n?
- deep582
- · Replies 3 ·
Graduate Closed-form solutions to the wave equation
- schieghoven
- · Replies 6 ·
Graduate Lectures of quantum mechanics?
- Lojzek
- · Replies 1 ·
Undergrad Is Time Travel Possible in the Quantum World?
- mite
- · Replies 1 ·
Graduate Can Cooper Pairs Be Explained Through the Casimir Effect?
- LocationX
- · Replies 5 ·
Graduate Books on the photoelectric effect and its applications
- mtfmorsh
- · Replies 2 ·
Graduate What to learn to link EM wave to photon picture?
- Gerenuk
- · Replies 11 ·
Graduate Quantum mechanics and the speed of light
- ghadir-jafari
- · Replies 2 ·
Graduate Eigenfunctions of inverse operators and commutation
- good_phy
- · Replies 5 ·
Graduate What does Zee mean by the ephemeral nature of life in QFT?
- Shaun Culver
- · Replies 9 ·
Graduate [Q]Expression of Group velocity in QM
- good_phy
- · Replies 1 ·
Graduate Can the Fredkin Gate be Proven to be Reversible and a Universal Classical Gate?
- H-bar None
- · Replies 5 ·
Graduate Understanding Energy Operator in Time-Dependent Schrodinger Equation
- good_phy
- · Replies 5 ·
Graduate Modifications to Einstein-Hilbert action
- quasar_4
- · Replies 3 ·
Graduate How Does the Wave Function Determine Particle Location Probability?
- madmike159
- · Replies 5 ·
Graduate [Q]eigenfunction of position operator and negative energy
- good_phy
- · Replies 3 ·
Graduate Did Planck's Original Blackbody Radiation Theory Overlook Zero Point Energy?
- FranzDiCoccio
- · Replies 1 ·
Graduate [Q] Time uncertainty and particle energy similar to photon
- good_phy
- · Replies 2 ·
Graduate Proving Hermitian if it has real eigenvalues
- maddogtheman
- · Replies 9 ·
Graduate False: The Time Independent Hamiltonian Operator "H
- mani5200
- · Replies 3 ·
Graduate Spinor Spreading: Relation between \psi and \chi
- intervoxel
- · Replies 3 ·
Graduate Which operator is suitable to define a qubit?
- Lojzek
- · Replies 2 ·
Graduate [Q]Analytic function of operator A
- good_phy
- · Replies 7 ·
Graduate How would a microscopic being measure its position in a coordinate system?
- newbee
- · Replies 19 ·
Graduate How does the expectation value of x follow from its definition?
- pardesi
- · Replies 6 ·