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 Remind me where to find a proof of a spectral theorem for RHS
- Fredrik
- · Replies 4 ·
Graduate If you measure the energy of a system how does wave function collapse
- cooev769
- · Replies 12 ·
Graduate Is There Experimental Proof of Photon Existence Beyond Emission and Absorption?
- JCMaxwell
- · Replies 3 ·
Graduate Why is there little decoherence for photons?
- Halaaku
- · Replies 10 ·
Graduate How to compute Von Neumann entropy?
- naima
- · Replies 7 ·
Graduate Virtual particles and the Uncertainity Principle
- Yashbhatt
- · Replies 6 ·
Graduate Shape of the magnet in the Stern-Gerlach experiment
- carllacan
- · Replies 1 ·
Graduate Set Up Eigenspace for Particle in 1st State: nx,ny,nz
- helpppmeee
- · Replies 7 ·
Graduate Understanding Coupled Spin Operators
- cooev769
- · Replies 7 ·
Graduate Net Angular Momentum: Clarifying Confusion
- cooev769
- · Replies 3 ·
Graduate Understanding S-matrix elements in QFT
- "Don't panic!"
- · Replies 6 ·
Graduate How Do Matrix Representations Relate to Wave Functions in Quantum Mechanics?
- cooev769
- · Replies 3 ·
Graduate Photon's change of direction of propagation
- Goodver
- · Replies 1 ·
Graduate Is it possible to do quantum mechanics without complex functions
- cooev769
- · Replies 12 ·
Graduate Is there a law which prohibits measuring En of a non-stationary state
- cooev769
- · Replies 6 ·
Graduate Adiabatic switching vs wavepackets for deriving the S-matrix
- geoduck
- · Replies 10 ·
Graduate Numerical solution of one dimensional Schrodinger equation
- mojtaba m
- · Replies 3 ·
Undergrad Molecular orbitals sigma and pi
- pamelmf
- · Replies 3 ·
Graduate Is Negative Mass Possible in String Theory Through Quantum Fluctuations?
- Strange_matter
- · Replies 1 ·
Graduate What is the wave equation for the Casimir Effect and how was it derived?
- epislon58
- · Replies 1 ·
Graduate Kinetic Energy of particle in 1D and 3D well
- PsychonautQQ
- · Replies 2 ·
Graduate Retro causation in weak measurements?
- Murgue
- · Replies 1 ·
Graduate Questions about quantum fields
- AtomicCanadian
- · Replies 5 ·
Graduate A Negation of the Grandfather Paradox
- jacirez
- · Replies 3 ·
Graduate Differential of exponential operator
- SK1.618
- · Replies 2 ·
Undergrad Can someone explain Compton scattering?
- Coop
- · Replies 10 ·
Graduate Pauli exclusion principle and position-state restriction
- hokhani
- · Replies 7 ·
Graduate Calculating Matrix Representation of 11><11 for 2 Qubits
- Getterdog
- · Replies 5 ·
Graduate Dirac Delta Function: Is delta(x-y) the Same as delta(y-x)?
- eahaidar
- · Replies 7 ·
Graduate Necessary axioms to derive solution to QHO problem
- snoopies622
- · Replies 2 ·
Graduate Multiple entangled particles and no-communication
- Ookke
- · Replies 4 ·
Graduate Finding work function from photoelectric effect data
- bobbles22
- · Replies 1 ·
Graduate Angular momentum in the 3D Schrodinger eqn with a central force
- hideelo
- · Replies 8 ·
Graduate No-cloning and uncertainty principle
- nomadreid
- · Replies 7 ·
Graduate Step potential with E<V: reflection coefficient and probability current
- hnicholls
- · Replies 2 ·
Graduate CHSH experiment with SPOT detector: polarization detection and cos² formula
- midix
- · Replies 5 ·
Graduate Delbrück scattering results in ether?
- nomadreid
- · Replies 10 ·
Graduate Solving Matrix Eigenvalue Equation for ψ_{200} and ψ_{210} States
- M. next
- · Replies 1 ·
Undergrad How can the atomic radius of any atom be accurately calculated?
- omax
- · Replies 8 ·
Graduate Do electrons jump instantaneously between energy levels or transition gradually?
- BOAS
- · Replies 4 ·
Graduate Questions on the Dirac equation
- Matterwave
- · Replies 11 ·
Graduate Why scalar fields become operators in QFT and how particles are defined
- HomogenousCow
- · Replies 5 ·
Graduate Permenance of Collapsed Wave Function Spin State
- ChiralWaltz
- · Replies 6 ·
Graduate Older nuclear structure models.
- carllacan
- · Replies 1 ·
Graduate Group theory and quantum mechanics
- journeyman1986
- · Replies 2 ·
Graduate J.J. Sakurai: Error of 2nd Order in d x' Eq (1.6.24)
- omoplata
- · Replies 5 ·
Undergrad Why do electrons drop energy levels?
- jonland82
- · Replies 11 ·
Graduate At What Scale Does Quantum Mechanics Impact CPU Functionality?
- need_aca_help
- · Replies 1 ·
Graduate What is the quantum anti-zeno effect?
- James MC
- · Replies 9 ·
Graduate Approx. Solution To Quantum Harmonic Oscillator for |x| large enough
- Chem.Stud.
- · Replies 6 ·
Graduate Commutator expectation value in an Eigenstate
- Matterwave
- · Replies 19 ·
Graduate Sequential measurements of conjugate observables
- atyy
- · Replies 21 ·
Graduate Can someone explain the ignorance ensemble theory
- batmanandjoker
- · Replies 1 ·
Graduate Will the Casimir Effect Operate Between Bolt Threads at 10nm?
- jaiii
- · Replies 1 ·
Graduate Sum of the probabilities equals 3 in bipartite covariance ?
- jk22
- · Replies 7 ·
Graduate Are two electrons in an hydrogen orbital positionally dependent ?
- xortdsc
- · Replies 6 ·
Graduate Is Quantum Entanglement Instantaneous for All Observers?
- Terdbergler
- · Replies 21 ·
Graduate Entanglement entopy and area law
- arpharazon
- · Replies 3 ·
Graduate Operator transformation under infinitesimal unitary transformation
- M. next
- · Replies 3 ·
Graduate Path integrals as usually presented - what does it tell us?
- pellman
- · Replies 4 ·
Graduate Unruh Effect and Temperature Differentials
- trendal
- · Replies 5 ·
Graduate Quantization Rule for Planetary Motion?
- Mahasweta
- · Replies 1 ·
Graduate Delayed-choice multi entanglement swapping
- StevieTNZ
- · Replies 3 ·
Graduate Dirac ket-bra simplification over here.
- M. next
- · Replies 7 ·
Graduate Hesienburg Uncertainity Principal
- Tigersharkmks
- · Replies 8 ·
Graduate Superposition in the Macro World - Why Not?
- T2theB
- · Replies 20 ·
Graduate QM and a new way to calculate probabilities
- DaTario
- · Replies 8 ·
Graduate Quantum numbers and Pauli exclusion principle in molecules
- Bob65
- · Replies 5 ·
Graduate Ground State Energy of quantum oscillator
- PsychonautQQ
- · Replies 1 ·
Graduate Two interfering antennas with single photon radiation
- user3
- · Replies 2 ·
Graduate When do Newtonian mechanics breakdown
- shanepitts
- · Replies 3 ·
Graduate Wave Function Terminology - Are these synonyms?
- shanepitts
- · Replies 4 ·
Graduate Conserved Charges of Stress Energy Tensor
- WarDieS
- · Replies 2 ·
Graduate Infinite Potential Colliding with Wave Function: Is it Correct?
- rmfw
- · Replies 1 ·
Graduate Multiple universes in cosmology and quantum mechanics
- greypilgrim
- · Replies 6 ·
Graduate Large N Expansion: Getting Started
- metamathphys
- · Replies 3 ·
Graduate Calculating Probability Density in Quantum Mechanics
- Tigersharkmks
- · Replies 3 ·
Graduate States are or aren't unit vectors?
- nomadreid
- · Replies 16 ·
Graduate Is Yang-Mills scale invariant?
- nonequilibrium
- · Replies 9 ·
Graduate Can you combine wavelengths to ionize atoms
- ranger275
- · Replies 2 ·
Graduate Do London dispersion forces play a role in biological replication?
- Eagle9
- · Replies 5 ·
Graduate Quantum Zeno effect survival probability derivation gaps
- James MC
- · Replies 9 ·
Graduate Q3: How do we measure rotational degrees of freedom in quantum mechanics?
- bkent9
- · Replies 4 ·
Graduate Does QM violate the causality principle?
- HamzahA
- · Replies 4 ·
Graduate Is it possible to use Quantam entanglement to study event horizon
- kkragam
- · Replies 7 ·
Graduate What is the disparity in the dimensionality of angular momenta?
- Matterwave
- · Replies 8 ·
Graduate Does spin have a spatial direction
- aaaa202
- · Replies 6 ·
Graduate Double slit experiment with electrons - detector at one slit
- fizixfan
- · Replies 8 ·
Graduate Mermin's One-Measurement Refutation of Local Hidden Variables
- stevendaryl
- · Replies 3 ·
Graduate Atomic Probability Densities Always Even?
- physicsphreak2
- · Replies 1 ·
Graduate Why does scaling the uncertainty principle give frequency not angular frequency?
- alejandrito29
- · Replies 7 ·
Graduate Some questions about spin in relation to the stern-gerlach experiment
- xortdsc
- · Replies 8 ·
Graduate Non-Relativistic QED Textbook Reference - Zag
- Zag
- · Replies 2 ·
Graduate Finite well penetration depths dependence on Well Length
- PsychonautQQ
- · Replies 1 ·
Graduate Quantum Explanation of Magnets
- Hornbein
- · Replies 3 ·
Graduate C from quantum first principles?
- nomadreid
- · Replies 4 ·
Graduate Connecting classical plane waves to quantized EM field operators
- MisterX
- · Replies 1 ·
Graduate Is it possible for a wave function to have a discontinuous first derivative?
- LagrangeEuler
- · Replies 14 ·
Graduate Use of component tensor product in quantum mechanics?
- jk22
- · Replies 2 ·
Graduate Storing data in quantum spaces.
- pondzo
- · Replies 5 ·