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 What happens if you take two quantum entangled particle and
- MilesStandish
- · Replies 11 ·
Graduate Does Decoherence Solve the Measurement Problem Completely
- Prathyush
- · Replies 88 ·
Graduate What does spin 1/2 mean and why two revolutions?
- Tonywryip
- · Replies 2 ·
Undergrad What is spin and why does is particle emission possible
- Sharpe27
- · Replies 8 ·
Graduate Can I Use the EOM to Simplify an Interaction Term in Feynman Diagrams?
- jfy4
- · Replies 10 ·
Graduate How many tree-levels in various QED processes
- Lapidus
- · Replies 3 ·
Graduate Describing polarization of a coheret state parametrizing on poincare sphere
- TheBlackNinja
- · Replies 1 ·
Undergrad What is oscillator strength?
- hanisan
- · Replies 1 ·
Graduate How to Calculate Expectation Values in Spherical Coordinates?
- M. next
- · Replies 1 ·
Graduate Can spin-1/2 particles deflect in the Aharonov-Bohm effect?
- cragar
- · Replies 4 ·
Graduate Defeated by quantum field theory yet again
- HomogenousCow
- · Replies 28 ·
Graduate How does a quantum wave function describe a particle?
- nukeman
- · Replies 20 ·
Graduate Solving Problems Using Quantum Mechanics
- bgq
- · Replies 13 ·
Graduate Unruh effect and detectors moving in a circle
- asimov42
- · Replies 1 ·
Graduate Having a hard time thinking about quantum mechanical vector addition.
- Silversonic
- · Replies 3 ·
Undergrad If everything is random how can we have laws?
- Avichal
- · Replies 13 ·
Graduate Which symmetry follows Ward-Takahashi identity?
- ndung200790
- · Replies 12 ·
Graduate Invariance of energy under change of origin
- cdog1350
- · Replies 6 ·
Graduate Dimensional analysis of the SED
- aaaa202
- · Replies 6 ·
Graduate How Does the Outer Product Operate on Quantum Mechanical Operators?
- dipole
- · Replies 2 ·
Graduate Superposed photon hitting a polarizing beamsplitter
- jelrod45
- · Replies 2 ·
Graduate Some questions on quantum teleportation
- iamconfuzed
- · Replies 9 ·
Graduate Existence of adjoint of an antilinear operaor, time reversal
- youngurlee
- · Replies 2 ·
Graduate Transforming a 4-vector integration measure
- Sekonda
- · Replies 9 ·
Undergrad What exactly does a degree of freedom mean?
- HomogenousCow
- · Replies 5 ·
Graduate Scattering Amplitude for a given potential
- Sekonda
- · Replies 6 ·
Graduate Do compatible operators have the same eigenvalues?
- M. next
- · Replies 3 ·
Graduate How Do Electrons Behave in a Half-Filled P Orbital?
- DiracPool
- · Replies 5 ·
Graduate A Kantian View of Quantum Mechanics
- arupel
- · Replies 3 ·
Graduate Factors of Frank Condon Blockade
- bekjunhao
- · Replies 1 ·
Graduate Change of basis of density matrix
- Bizarre123
- · Replies 9 ·
Graduate Why Does Transition Amplitude Not Equate to Time Evolution in Quantum Mechanics?
- HomogenousCow
- · Replies 6 ·
Graduate What is a loop (in Feynman Diagrams)?
- Sekonda
- · Replies 2 ·
Graduate Are Spinors Truly Invariant Under Coordinate Transformations Beyond Lorentz?
- thehangedman
- · Replies 16 ·
Graduate Orbital and energy shell transitions
- DiracPool
- · Replies 1 ·
Graduate Faster than light information travel
- JohnLuck
- · Replies 22 ·
Graduate Potential in the schrödinger equation
- aaaa202
- · Replies 6 ·
Graduate Quantum Tunneling: Fusion possibilities.
- black phantom
- · Replies 1 ·
Graduate Perturbation Theory (Non-Degenerate)
- jhosamelly
- · Replies 7 ·
Graduate Which equation is used to calculate the momentum of an electron?
- DownQuark
- · Replies 5 ·
Graduate Quantum hamiltonian with an expoenntial potetial.
- zetafunction
- · Replies 3 ·
Graduate Explain Spin-Orbit Coupling for d Orbital l=2
- chill_factor
- · Replies 1 ·
Graduate Sx acting on up spin particle confusion
- DocZaius
- · Replies 5 ·
Graduate Eigenfunctions of spin operator
- function22
- · Replies 4 ·
Graduate Normalizeable solutions when separating the SED
- aaaa202
- · Replies 1 ·
Graduate Electromagnetic spin from Noether theorem and spin photon
- paolorossi
- · Replies 10 ·
Graduate Why all operators in QM have a Hermitian Matrices
- mwalmasri
- · Replies 6 ·
Graduate What is the physics behind quantum tunneling
- einstein1921
- · Replies 21 ·
Graduate Have i been mislead by b greene? quantum teleportation
- g.lemaitre
- · Replies 1 ·
Graduate Second Quantization for Fermions
- jhosamelly
- · Replies 4 ·
Graduate Understanding Eigenvalue Measurement in Quantum Systems
- M. next
- · Replies 8 ·
Graduate Wave function of multiple particles
- randomafk
- · Replies 5 ·
Graduate Proof of Planck Length: A Pedological Derivation
- y33t
- · Replies 7 ·
Graduate Tunnelling and special relativity
- sj660
- · Replies 7 ·
Graduate The Klein-Gordon equation with a potential
- Sekonda
- · Replies 32 ·
Graduate Can This Equation Be Applied to Both Continuous and Discrete Energy Spectra?
- M. next
- · Replies 5 ·
Graduate Fock spaces semantics and number of particles
- TheBlackNinja
- · Replies 4 ·
Graduate How do I handle degenerate eigenvalues and eigenvectors in quantum mechanics?
- M. next
- · Replies 2 ·
Graduate Change of Schrodinger equation when we change frame of reference
- AxiomOfChoice
- · Replies 1 ·
Graduate First quantum teleportation of macroscopic objects
- g.lemaitre
- · Replies 11 ·
Graduate What does propogation of wave packets mean?
- mycotheology
- · Replies 2 ·
Graduate Coulomb potential in Kohn-Sham DFT
- molkee
- · Replies 1 ·
Graduate Successive Measurements of angular momentum
- Sekonda
- · Replies 9 ·
Graduate How Does Electron Decay in a Magnetic Field Work?
- elementHTTP
- · Replies 1 ·
Graduate Why must probability current vanish at the surface in Klein-Gordon equation?
- Sekonda
- · Replies 4 ·
Graduate Fining Clebsch-Gordan coeffs in special cases, alternate method
- Jesssa
- · Replies 3 ·
Graduate Time Confirmed: Arrow of Time for Particles
- Quantumental
- · Replies 1 ·
Graduate Jacobian in path integral equal to one?
- geoduck
- · Replies 3 ·
Graduate On the quantum theory of radiation
- A_B
- · Replies 1 ·
Graduate Expectation values of harmonic oscillator in general state
- Jomenvisst
- · Replies 3 ·
Graduate Diffraction Pattern of Buckminsterfullerene
- AlephOne
- · Replies 1 ·
Graduate How to incorporate spin into the wavefunction?
- HomogenousCow
- · Replies 6 ·
Graduate Welcome Physics Lovers! Ask Your Questions About Electron Spin
- EinsteinII
- · Replies 4 ·
Graduate Are Equivalent Wave Functions Physically Equivalent in Quantum Mechanics?
- burakumin
- · Replies 5 ·
Undergrad Photoelectric Effect: Why Can't Low Freq Light Excite Electrons?
- nothing0
- · Replies 2 ·
Graduate Measuring "Velocity" in Quantum Mechanics: Meaning of the p/m Operator
- bob900
- · Replies 1 ·
Graduate A electron can exist in everywhere ?
- big_bounce
- · Replies 62 ·
Graduate The reality of Configuration space
- bohm2
- · Replies 94 ·
Undergrad How do electron and hole wave functions overlap?
- ohopu
- · Replies 1 ·
Graduate Gauge Symmetry in Quantum Mechanics (QM I) Explained
- the_kid
- · Replies 4 ·
Graduate Expanding a translation operator
- Woodles
- · Replies 2 ·
Graduate Can We Send Information FTL Through Entanglement?
- the_pulp
- · Replies 2 ·
Graduate Electric polarization of free space
- Hetware
- · Replies 2 ·
Graduate Ladder Operators and Dirac as the source.
- TheShrike
- · Replies 6 ·
Graduate Why is the spin projection operator (1−γ₅s̸)/2 covariant?
- LayMuon
- · Replies 1 ·
Graduate Why do wavefunctions have a complex part in the Schrodinger wave equation?
- sarvesh0303
- · Replies 16 ·
Graduate Using Path Integral to calculate propagator
- cattlecattle
- · Replies 4 ·
Graduate What Are Quantum Numbers and How Are They Calculated?
- dbmorpher
- · Replies 2 ·
Graduate Obtaining Higher Angular Frequencies in QHO Excited States
- copernicus1
- · Replies 3 ·
Graduate What is the correct method for solving the infinite square well energy problem?
- rsaad
- · Replies 6 ·
Graduate How to derive [P(x), L(y)] = iℏP(z)
- rsaad
- · Replies 6 ·
Graduate Doing a Minor Presentation of Parity/Chirality
- Vorde
- · Replies 3 ·
Graduate Is the Expectation Value of Momentum Always Zero in Time-Independent States?
- Johny18
- · Replies 1 ·
Graduate Is quantum entanglement fully understood?
- Fizicks1
- · Replies 2 ·
Graduate Observations in Classically Forbidden Region
- copernicus1
- · Replies 1 ·
Graduate Quantum teleportation question
- sungholee
- · Replies 4 ·
Graduate Bell experiments with circularly polarized photons
- Iforgot
- · Replies 43 ·
Graduate Understanding spin and axis in quantum entanglement
- San K
- · Replies 2 ·
Graduate Parameter μ dimensional regularization qed
- paolorossi
- · Replies 8 ·
Graduate Stupid question on anomalous magnetic moment of the electron
- paolorossi
- · Replies 7 ·