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 Photocurrent and frequency of incident light
- ViolentCorpse
- · Replies 2 ·
Graduate Is Squaring the Momentum Operator the Same as Applying it Twice?
- Sylvia Else
- · Replies 3 ·
Graduate Transforming Representations of SO(3) to Act on Vectors?
- silverwhale
- · Replies 30 ·
Graduate Are raising and lowering operators factors of the Hamiltonian?
- Roodles01
- · Replies 1 ·
Graduate Matrix exponentiation using gsl library (Computational Quantum Mechanics)
- sijokjoseph
- · Replies 5 ·
Graduate Expectation value at ground state
- Roodles01
- · Replies 1 ·
Graduate Why doesn't one-photon-irreducible function have any pole at q^2=0?
- kof9595995
- · Replies 2 ·
Graduate What is the minimum observer energy?
- Jeff Rosenbury
- · Replies 3 ·
Undergrad Does a beam of electrons in vacuum at near light speed generate a magnetic field?
- rrosenthal
- · Replies 3 ·
Graduate Stability of atoms in QM / QED
- tom.stoer
- · Replies 6 ·
Graduate Time independant perturbation problem
- omoplata
- · Replies 3 ·
Graduate Molecular material ground state
- hokhani
- · Replies 5 ·
Graduate Parametrization of uniformly distributed n dimensional states
- Arubaito
- · Replies 14 ·
Graduate Are Bose Eistein Condensates Classical Objects
- bhobba
- · Replies 30 ·
Graduate What Misconceptions Exist in What The Bleep Do We Know?
- WalkTheWorld
- · Replies 2 ·
Graduate Collection of foundational papers?
- jjustinn
- · Replies 5 ·
Undergrad The strength of electromagnetism in an atom?
- 42Physics
- · Replies 3 ·
Graduate Time independant perturbation - Difficulty understanding derivation
- omoplata
- · Replies 4 ·
Graduate Why does gravity become incompatible with quantum mechanics at small scales?
- Cody Richeson
- · Replies 7 ·
Graduate Probability of finding electron.
- nil1996
- · Replies 1 ·
Graduate Spin singlets and the Bell states
- VantagePoint72
- · Replies 3 ·
Graduate Finite Hilbert Space v.s Infinite Hilbert Space in Perturbation Theory
- ck00
- · Replies 7 ·
Graduate Initial wave function for an electron in a magnetic field
- Syrius
- · Replies 3 ·
Graduate Why do virtual particles separate and recombine?
- friend
- · Replies 4 ·
Graduate Does photon exist without velocity c ?
- cooper607
- · Replies 1 ·
Graduate HUP and good quantum numbers that commute
- Salman2
- · Replies 2 ·
Undergrad Do electrons need specific energies to excite electrons
- GeneralOJB
- · Replies 4 ·
Graduate How can the expression for orthonormal states be simplified?
- omoplata
- · Replies 2 ·
Graduate Accurate equations vs. accurate models in QM
- jon4444
- · Replies 13 ·
Graduate Dr. Plato A Lucien Hardy called and
- Charles Wilson
- · Replies 3 ·
Graduate How can a ground state of free particles have entanglement?
- nonequilibrium
- · Replies 3 ·
Graduate Tattoo featuring quantum physics
- BslBryan
- · Replies 27 ·
Graduate Does metronome synchronization have anything/nothing to do with QM/QE?
- San K
- · Replies 1 ·
Graduate What is the correlation between photon events in space and time?
- Scipio
- · Replies 4 ·
Graduate How close can we photograph individual atoms with light?
- Double-Slit
- · Replies 16 ·
Graduate How do we know that wave f. is the eigenfunction of an operator H?
- 71GA
- · Replies 8 ·
Graduate Is a static EM field made of photons? Do they move at c?
- JohnRood
- · Replies 23 ·
High School Why are Newton's rings circular in shape?
- Mannu136
- · Replies 1 ·
Graduate Mass of a permanent magnet levitating a superconductor?
- keelejak
- · Replies 1 ·
Graduate Is the wave function, an unreal tool, to partially model a real interaction?
- San K
- · Replies 4 ·
Graduate Peskin Schroeder page 30 eq 2.54
- silverwhale
- · Replies 17 ·
Graduate Problem understanding Wigner's classification
- jinawee
- · Replies 14 ·
Graduate Other ways to create an interference pattern?
- SonOfBruze
- · Replies 11 ·
Graduate Total momentum operator in peskin/schroeder
- copernicus1
- · Replies 1 ·
Graduate Difficulties in understanding Brownian motion.?
- leppad
- · Replies 5 ·
Graduate An eigenstates, eigenvectors and eigenvalues question
- pigletbear
- · Replies 3 ·
Graduate Particle in magnetic field, classical and quantum view
- Nemanja989
- · Replies 5 ·
Graduate PBR Theorem: Abandon Quest for Ontic Models of QM?
- jk22
- · Replies 9 ·
Graduate Path Integrals Harmonic Oscillator
- Wislan
- · Replies 1 ·
Graduate What is the energy-time uncertainty relationship in quantum mechanics?
- g.lemaitre
- · Replies 1 ·
Graduate Feynman rules from Yang-Mills lagrangian
- center o bass
- · Replies 7 ·
Graduate Proper form of schrodinger's equation?
- unchained1978
- · Replies 3 ·
Graduate The use of different bases in QFT
- unchained1978
- · Replies 1 ·
Graduate Spin-Orbit Coupling: A Bohr-Orbital Model?
- Fightfish
- · Replies 2 ·
Graduate Equivalence of differential operator terms in action
- Mithra
- · Replies 2 ·
Graduate Sakurai page 196: Orbital angular momentum as rotation generator
- omoplata
- · Replies 2 ·
Graduate Bra-ket notation and qubit issue.
- Relative0
- · Replies 3 ·
Graduate Does quantization mean there are only so many colors?
- Stonius
- · Replies 8 ·
Graduate Why does light partially reflect off a single glass surface in QED?
- jon4444
- · Replies 1 ·
Graduate Electron LOSING energy to the quantum vacuum?
- Pseudo Epsilon
- · Replies 15 ·
Graduate Gauge transformation of Yang-Mills field strength
- center o bass
- · Replies 3 ·
Graduate From statistical to ontological: uncertainty principle
- nomadreid
- · Replies 11 ·
Graduate Why is the electron bound to the hydrogen atom in quantum mechanics?
- LagrangeEuler
- · Replies 3 ·
Graduate Argument for quantum indeterminism
- alpha358
- · Replies 8 ·
Graduate Why only the negative energy particle falls into black holes in Hawking radiation
- dsmikk
- · Replies 13 ·
Graduate Is the wigner D function a representation of SO(3)?
- Yoran91
- · Replies 1 ·
Graduate Proof for commutator $[\hat{H},\hat{a}] = - \hbar \omega \hat{a}
- 71GA
- · Replies 8 ·
Graduate Does time-dependent linear polarization angle equal circular polarization?
- wotanub
- · Replies 1 ·
Graduate Where did they come from and when?
- Pseudo Epsilon
- · Replies 3 ·
Graduate Why do quantum mechanics postulates seem ad-hoc compared to special relativity?
- HomogenousCow
- · Replies 70 ·
Undergrad Determining the Weight of a simple string
- Sekonda
- · Replies 1 ·
Graduate Quantum internet running at Los Alamos National Labs
- Greg Bernhardt
- · Replies 2 ·
Graduate How to derive or verify Hartree product?
- gofightwin
- · Replies 1 ·
Graduate Sakurai page 181: Time evolution of ensembles
- omoplata
- · Replies 2 ·
Graduate Electrons viewed in real time for the first time ever
- zincshow
- · Replies 1 ·
Graduate Harmonic solutions as Riemannian oscillators ?
- glengarry
- · Replies 3 ·
Graduate What is the maximum energy density of EM radiation and its effects?
- easyrider
- · Replies 3 ·
Graduate Fock space and the Brillouin condition
- beans73
- · Replies 1 ·
Graduate For a electron orbiting around the nucleus, why must it be in phase?
- Outrageous
- · Replies 7 ·
Graduate Can a Photon be thought of as a bit?
- hankaaron
- · Replies 7 ·
Graduate Uncertainty principle regarding a narrow optical fibre?
- bcrelling
- · Replies 5 ·
Graduate What is the meaning of σ and π bonds in molecules quantum mechanically?
- hokhani
- · Replies 5 ·
Graduate Can we calculate the past if we know the present state of all particles?
- DrZoidberg
- · Replies 10 ·
Graduate How can an asymptotic series give accurate results as in QED?
- shunra
- · Replies 2 ·
Graduate Virtual particales and black holes.
- medgalis
- · Replies 3 ·
Graduate Quantum objects and the law of identity over time
- glengarry
- · Replies 14 ·
Graduate Why Does Planck Time Exist?
- Slem
- · Replies 16 ·
Graduate Vacuum expectation value and lorenz (trans) invariance
- center o bass
- · Replies 5 ·
Graduate Forming Hydrogen wave functions with real spherical harmonics
- dipole
- · Replies 5 ·
Graduate Why is the total Hilbert space the tensor product of subsystem spaces?
- Yoran91
- · Replies 6 ·
Graduate Self-adjointness of H, particular example
- fluidistic
- · Replies 18 ·
Graduate What Challenges Arise in QM/QFT with Non-Separable Hilbert Spaces?
- Bobhawke
- · Replies 12 ·
Graduate Phase shift between R_01 and R_02 in Kim's delayed choice eraser
- msumm21
- · Replies 3 ·
Graduate How photonless communication differs from entanglement
- wheelersbit
- · Replies 9 ·
Graduate Quantum physics explanation problem
- hawkdron496
- · Replies 2 ·
Graduate Proof of second quantization operators
- Tilde90
- · Replies 8 ·
Graduate How to derive the result of applying a parametrized CNOT operator to a two-qubit state
- ShayanJ
- · Replies 2 ·
Graduate The uncertainty principle and the measurement postulate
- la6ki
- · Replies 5 ·
Undergrad Is Zero Point Energy Truly Unattainable?
- JayJohn85
- · Replies 4 ·
Graduate Debye model in Statistical Physics
- M. next
- · Replies 2 ·