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 Defining exchange statistics of anyons in terms of Berry phase
- throneoo
- · Replies 1 ·
High School What’s the difference between TIQM and Time Symmetric QM? (a
- thenewmans
- · Replies 4 ·
Undergrad Physical significance of a.σ in expectation -E(a.σ b.σ)?
- N88
- · Replies 82 ·
Undergrad Position representation of the state of the system
- fog37
- · Replies 70 ·
Graduate Deriving matrix element from Lagrangian
- spaghetti3451
- · Replies 1 ·
Graduate Is the Effective Potential the same Quantum Potential?
- vincequantum93
- · Replies 1 ·
Undergrad What is the physical meaning "without spin-orbit interaction
- cytksu
- · Replies 4 ·
Undergrad Name for electron's trajectory outside of the orbit?
- icakeov
- · Replies 8 ·
Undergrad First order perturbation derivation
- spacetimedude
- · Replies 6 ·
High School What is the Quantum of Sound in Gases and Air
- ThunderLight
- · Replies 11 ·
Undergrad Calculating Hamiltonian matrix elements in a chaotic system
- Pyrus96
- · Replies 1 ·
Undergrad How is the order of events reversed in 1 trillion frames per second videos?
- Ostrados
- · Replies 12 ·
Undergrad Why Don't L2 and Ly Commute When L2 and Lx Do?
- dyn
- · Replies 3 ·
High School Entanglement measurements timing
- Ostrados
- · Replies 22 ·
Undergrad I say that this experiment confirms Schrodinger's Cat....
- bodycode
- · Replies 24 ·
Graduate Are two models with the same S matrix directly related by their parameters?
- gonadas91
- · Replies 3 ·
Undergrad Fields: Unobservable, Yet Physical?
- dm4b
- · Replies 45 ·
Undergrad Can quantum Zeno effect be applied to macroscopic systems?
- Trollfaz
- · Replies 1 ·
Undergrad How is Graphene's Hamiltonian rotationally invariant?
- Type1civ
- · Replies 2 ·
High School Untappable quantum communications?
- GTOM
- · Replies 7 ·
Undergrad Is the spin linked to the third quantum number ?
- Dinofou
- · Replies 3 ·
Undergrad Coherent Photons: Uncertainty and Locality
- Marrrrrrr
- · Replies 4 ·
Undergrad Can the spin states of a spin1 particle be modeled?
- edguy99
- · Replies 4 ·
Undergrad Is the particle in a 1-D infinite well doubly degenerate?
- dyn
- · Replies 7 ·
Undergrad How can an atom change from ground to excited state?
- ConfusedRookie
- · Replies 18 ·
Undergrad Entanglement, magnetic field and conservation law
- Adel Makram
- · Replies 15 ·
High School Dirac Equation: Combining Quantum Mechanics and Special Relativity
- cube137
- · Replies 11 ·
Graduate Scale invariant inverse square potential
- hilbert2
- · Replies 15 ·
Undergrad Maxwell's Equation's From Klein Gordon
- bhobba
- · Replies 2 ·
Undergrad How does nucleation work in cosmology?
- Rodrigo Olivera
- · Replies 1 ·
Undergrad QFT operators time/space asymmetry?
- TeethWhitener
- · Replies 8 ·
High School Quantum gravity and worldlines
- cube137
- · Replies 1 ·
High School Wave particle duality - my visual/mental image
- smsaks2000
- · Replies 1 ·
Undergrad What Is Entanglement? Definition & Examples
- edguy99
- · Replies 26 ·
Graduate Understanding spin precession in a magnetic field
- Tainty
- · Replies 5 ·
High School Can You Really Observe a Wave Function Without Collapsing It?
- Debaa
- · Replies 5 ·
Undergrad Position Operator Action on Wave Function: $\psi(x)$
- davidge
- · Replies 14 ·
Undergrad Orthogonality of Momentum Eigenstates: Why is ##\int e^{-ix}e^{2ix}dx=0##?
- Isaac0427
- · Replies 3 ·
Graduate Photon angular momentum and magnetic quantum number selection rules
- Tainty
- · Replies 30 ·
Undergrad Matrix Mechanics and non-linear least squares analogy?
- mike1000
- · Replies 30 ·
Undergrad Normalizing a Discrete Sum: Is the Wavefunction Fully Normalized?
- Isaac0427
- · Replies 2 ·
Undergrad What Are the Key Experiments and Applications of Momentum Entanglement?
- Ostrados
- · Replies 15 ·
Undergrad Thinking about the static electric field in terms of QFT
- FallenApple
- · Replies 10 ·
Undergrad Understanding Scalar Quantity in Basic Bra-Ket Arithmetic
- Vitani11
- · Replies 18 ·
Undergrad Lamb shift and the QFT vacuum....
- asimov42
- · Replies 3 ·
Undergrad Given a Hamiltonian, finding the energy levels
- Buggy Virus
- · Replies 4 ·
Undergrad Cgs or SI in quantum field theory?
- nomadreid
- · Replies 6 ·
High School Double slit probability question
- entropy1
- · Replies 143 ·
Undergrad Is E<mc^2 Critical for the Klein Paradox in Potential Step Analysis?
- Joker93
- · Replies 1 ·
Graduate Can entangled photons be used to explore black holes?
- Cindy Hops
- · Replies 10 ·
Undergrad The spin of the photon -- a weird experiment with a laser
- donavi
- · Replies 1 ·
Graduate Deriving the Lagrangian from the Hamiltonian operator
- redtree
- · Replies 3 ·
Undergrad What is the name for the "stuff" at heart of black hole?
- Cindy Hops
- · Replies 2 ·
High School Does a particle have a conscience of its own?
- Debaa
- · Replies 3 ·
Graduate Description of imaging through lens using quantized EM field
- zxontt
- · Replies 7 ·
High School Exercises total angular momentum and spin (more particles systems)
- Lola1
- · Replies 1 ·
Undergrad Vacuum cutoff, normal ordering, Planck scale and 10^120....
- asimov42
- · Replies 3 ·
Undergrad A question from reading Feynman's book on QED
- mike1000
- · Replies 15 ·
Undergrad Deriving Spherical Harmonics from Sakurai's Book
- davidge
- · Replies 12 ·
Undergrad Position and Momentum are random variables in QM?
- mike1000
- · Replies 4 ·
Undergrad Article on Quantum Bootstrapping and Geometric Theory Space
- jedishrfu
- · Replies 1 ·
High School Wavelength of Particles Moving at 1m/s
- Daniel Petka
- · Replies 2 ·
Undergrad What Do Elements in the Quantum Probability Formula <Ψ|P|Ψ> Represent?
- mike1000
- · Replies 7 ·
Undergrad Does a Delta Potential Barrier Allow for Bound Solutions?
- dyn
- · Replies 1 ·
Undergrad What is Photon Phase? Explaining Confusions
- Talisman
- · Replies 2 ·
Undergrad Proof that parity operator is Hermitian in 3-D
- dyn
- · Replies 16 ·
High School Can Quantum Linked Signals Be Observed in Real-Time in Space?
- Brad Jamison
- · Replies 5 ·
Undergrad Conservation of energy in quantum measurement
- maline
- · Replies 40 ·
Graduate Why the inside of a box is coherent
- Binax011
- · Replies 4 ·
Undergrad Two particles: Entangled State vs Non interacting State
- fog37
- · Replies 18 ·
Graduate Mathematical formulation of local non-realism
- greypilgrim
- · Replies 5 ·
High School Quantum Tunneling and Heat Distribution in Laser Cavities?
- Daniel Petka
- · Replies 7 ·
High School Funneling Light to an Electron: A Size Challenge
- gmalcolm77
- · Replies 1 ·
Undergrad What is the speed of decoherence and its predictions for coherent systems?
- Binax011
- · Replies 8 ·
Undergrad Do I have the correct form for the number of states, the |n>?
- rocdoc
- · Replies 14 ·
Undergrad About general solutions to Schrodinger equation
- betelgeuse91
- · Replies 13 ·
Undergrad Is Light a Particle or a Wave in Different Contexts?
- qnach
- · Replies 4 ·
High School Rest Energy - Kinetic Energy
- orangepeelsnice
- · Replies 3 ·
Undergrad Extending an infinitesimal operator
- davidge
- · Replies 4 ·
Graduate Is the electron a fundamental particle?
- Ostrados
- · Replies 3 ·
Undergrad What is the Wave Function and How Does it Compare to the Schrodinger Equation?
- Xilus
- · Replies 3 ·
Undergrad Is the Planck Length the Ultimate Limit of Measurement?
- nomadreid
- · Replies 5 ·
Undergrad Understanding the Role of Spinors in Quantum Mechanics
- Milsomonk
- · Replies 2 ·
Undergrad Does the Uncertainty Principle restrict a particle's path?
- mike1000
- · Replies 29 ·
Undergrad Built an HBT Interferometer but don't get the physics
- Mellowed
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Undergrad Which ψ do I use for the Expectation Value ?
- SpaceNerdz
- · Replies 3 ·
Undergrad How to synthesize quantum circuits?
- nashed
- · Replies 1 ·
Undergrad Density matrix on a diagonal by blocks Hamiltonian.
- voila
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Undergrad Difference between statistical and dynamical properties
- junt
- · Replies 4 ·
Undergrad Ionic bonding from a quantum mechanics point of view
- Ron19932017
- · Replies 1 ·
Undergrad Eigenvalues of Fermionic field operator
- Neutrinos02
- · Replies 13 ·
High School What is the amplitude of light?
- Daniel Petka
- · Replies 4 ·
High School Why is the Existence of a Quantum Field Questioned?
- Twodogs
- · Replies 13 ·
Undergrad Doesn't wave duality for massive objects favor pilot-wave?
- Ostrados
- · Replies 11 ·
Graduate Hologram theory and quantum physics = existential crisis
- Noclip1
- · Replies 5 ·
Graduate Duality principle is 'safe and sound'
- StevieTNZ
- · Replies 3 ·
High School Basic question about double slit interferance
- Ostrados
- · Replies 7 ·
Undergrad How are eigenstates and eigenvalues related in quantum mechanics?
- Jimmy87
- · Replies 22 ·
High School Does Dirac's Conclusion on Electron Velocity Still Align With Modern Physics?
- exmarine
- · Replies 7 ·
Undergrad What is the Role of Eigenfunctions in Understanding Quantum Mechanics?
- stevendaryl
- · Replies 14 ·