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 Can (ordo) Fermions convert to Bosons?
- RobbyQ
- · Replies 5 ·
Undergrad Why do different inner product notations seem inconsistent?
- nomadreid
- · Replies 6 ·
Undergrad The Power of QM and QFT
- bhobba
- · Replies 4 ·
Undergrad Importance of Hanbury Brown and Twiss experiment
- qnach
- · Replies 13 ·
Graduate Is It Known For Sure Infinites In QFT Are Caused Using a Continuum?
- bhobba
- · Replies 3 ·
Graduate Lesser Green's function
- rbphysics
- · Replies 1 ·
Undergrad What does the product part of Laughlin wave function mean?
- George Keeling
- · Replies 1 ·
Undergrad Does a qubit break interference in the double slit experiment?
- pines-demon
- · Replies 10 ·
Undergrad Schrödinger equation and classical wave equation
- Meden Agan
- · Replies 39 ·
High School New idea about wave-particle duality - looking for feedback/criticism
- fbas
- · Replies 1 ·
Undergrad Is Maxwell's electromagnetism an effective (field) theory?
- Husserliana97
- · Replies 3 ·
Undergrad Why can’t photons “pile up” to eject an electron?
- Kostik
- · Replies 3 ·
Undergrad The Extended Wigner's Friend Scenarios
- ChadGPT
- · Replies 42 ·
Graduate I have some naive questions about the Reeh-Schlieder theorem
- antaris
- · Replies 1 ·
Undergrad Do ensemble-based predictions truly describe real finite systems?
- syed
- · Replies 4 ·
Undergrad How strong is the justification for low probability extreme thermal fluctuations?
- syed
- · Replies 6 ·
High School Is a table levitating possible, even at a minuscule probability?
- syed
- · Replies 32 ·
Undergrad Energy*time uncertainty for particle decay
- jjson775
- · Replies 27 ·
Undergrad Commutation of operators for particle in a box
- hokhani
- · Replies 16 ·
High School A Time Crystal Visible to the Human Eye
- jedishrfu
- · Replies 5 ·
Undergrad Quantum Entanglement and Synchronization
- James Hasty
- · Replies 6 ·
Undergrad Electron energy in atoms
- hokhani
- · Replies 10 ·
Graduate What is the connection between entanglement and the no-cloning theorem?
- mister robi
- · Replies 1 ·
High School Two/three photon absorption chemical substance producing photons for electricity generation
- Cybersoya
- · Replies 0 ·
High School Quantum entanglement
- Mark Szumilewicz
- · Replies 1 ·
Undergrad Quantum behaviour of an electron around a positively charged sphere
- hokhani
- · Replies 18 ·
Undergrad Visual depiction of atomic orbitals
- hokhani
- · Replies 12 ·
Undergrad Bloch Sphere generalization for more than one qubit
- pervect
- · Replies 4 ·
Undergrad Probabalistic determination Photon Entaglement
- RobbyQ
- · Replies 6 ·
Undergrad Commutator of x and p in quantum mechanics
- rbphysics
- · Replies 4 ·
Graduate Physical properties of the vacuum in GR vs. QFT
- Iskandarani
- · Replies 15 ·
Graduate Confusion about creation/annihilation operators with interaction
- gasgas
- · Replies 1 ·
High School Schrödinger's cat question
- leonid.ge
- · Replies 6 ·
Undergrad How can quantum physics contribute to medical physics?
- juliocastro
- · Replies 1 ·
Graduate Eigenstates of the Klein Gordon Field Operator
- Jonathan Apps
- · Replies 8 ·
Undergrad Direction of time-evolution in time reversed wave functions
- hokhani
- · Replies 12 ·
Graduate Angular momentum uncertainty principle and the particle on a ring
- physical_chemist
- · Replies 5 ·
Graduate Effects of perception
- edmund cavendish
- · Replies 4 ·
Undergrad Emission probability in blackbody spectrum derivation
- Swamp Thing
- · Replies 1 ·
Undergrad Feynman's derivation of average square distance variation in Brownian motion
- l4teLearner
- · Replies 3 ·
Undergrad Phase and group velocity for the wave function
- hokhani
- · Replies 14 ·
Undergrad Validity of identical eigenfunction of commutating operators
- hokhani
- · Replies 12 ·
Undergrad Action of an Hermitian unitary operator member of SU(2)
- cianfa72
- · Replies 15 ·
Undergrad About concept of wave-particle duality
- south
- · Replies 11 ·
Undergrad Hydrogen 21 cm line time?
- jv11
- · Replies 5 ·
Undergrad I would like some assistance working with commutators
- hmparticle9
- · Replies 1 ·
Undergrad Shape of wave function (probability distribution) of a single photon
- J O Linton
- · Replies 16 ·
Undergrad Would gravitons theoretically act like photons?
- Josiah
- · Replies 18 ·
Graduate Baryon CP Violation Observed at CERN
- PeterDonis
- · Replies 7 ·
Graduate Geometry Topology and Physics: Nakahara, Chapt. 1: Weyl Ordering
- XiYi
- · Replies 1 ·
High School Energy-time uncertainty relation for a volume and macroscopic objects?
- Aidyan
- · Replies 2 ·
Graduate Why must operators map Hilbert space vectors to Hilbert space vectors?
- gaiussheh
- · Replies 59 ·
High School The wave function of the electron doesn't collapse when passing through air?
- cosmanino2050
- · Replies 9 ·
Undergrad New book on algebraic quantum physics
- A. Neumaier
- · Replies 6 ·
Undergrad Why quarter-wave plates don't distinguish H/V from D/A polarization mixtures
- Erik Ayer
- · Replies 7 ·
Undergrad Density matrix representation of a density operator
- cianfa72
- · Replies 8 ·
Undergrad How to understand quantum computers?
- Alex Notman
- · Replies 9 ·
Undergrad Bose-Einstein statistics and the Photon
- redtree
- · Replies 1 ·
Graduate Explicit construction of Galilean-invariant space
- Adgorn
- · Replies 1 ·
Undergrad Addition of angular momenta
- alebruna
- · Replies 1 ·
Undergrad Quantum decoherence vs. measurement process
- timmdeeg
- · Replies 3 ·
Undergrad Quantum eraser experiment
- J O Linton
- · Replies 3 ·
Graduate Can scattering experiment be used to determine location and momentum of an electron?
- sumitgarg1
- · Replies 2 ·
Insights Quantum Computing for Beginners
- Bob Walance
- · Replies 19 ·
Undergrad Bob and Alice with a Bell pair
- Heidi
- · Replies 3 ·
High School Gravitons vs photons: Does the size of the atom make any difference?
- Josiah
- · Replies 3 ·
Undergrad What's the deal with instantons?
- pines-demon
- · Replies 1 ·
Undergrad How to derive orbital angular momentum of spins in quantum mechanics?
- geelpheels
- · Replies 2 ·
Undergrad Deriving Bogoliubov transformations correctly
- pines-demon
- · Replies 12 ·
Undergrad Dirac's 1972 Boston talk on Projective geometry in quantum mechanics
- grzz
- · Replies 7 ·
High School Feynman QED Questions
- photonographer
- · Replies 15 ·
Graduate Scattering cross section between charged particle and magnetic moment
- dark_matter_is_neat
- · Replies 1 ·
Undergrad More information on the momentum eigenstate in the position basis
- hmparticle9
- · Replies 1 ·
Undergrad Measurement problem - will this work?
- Gary Venter
- · Replies 4 ·
Undergrad Quantum wavelength in gravitation
- south
- · Replies 6 ·
Graduate Pauli–Villars ghost fields?
- pines-demon
- · Replies 8 ·
Graduate Magnetic field produced by moving charge in operator form
- dark_matter_is_neat
- · Replies 14 ·
Undergrad Tensor products and simultaneous eigenstates
- LightPhoton
- · Replies 1 ·
Undergrad Molecular Quantum Computer Progress
- Hornbein
- · Replies 1 ·
Undergrad Coherence time for repeated spin measurements
- aa2ll2
- · Replies 9 ·
Graduate John Bell 1964 toy model for spin
- jf117
- · Replies 3 ·
High School Can arbitrarily slow motion exist below measurable limits?
- CelestialAeon
- · Replies 20 ·
Undergrad Black Hole Fermion Count
- .Scott
- · Replies 1 ·
Undergrad Free Schroedinger equation: time separation
- chartery
- · Replies 3 ·
Undergrad I would like an explanation of these extra energy states
- hmparticle9
- · Replies 3 ·
Graduate Does Causality in QFT Require Commuting Field Operators Outside the Light Cone?
- rbphysics
- · Replies 18 ·
High School Why NIST omits series limits from hydrogen strong line listings
- James Kahn
- · Replies 4 ·
Graduate Time Reversal and initial conditions
- hokhani
- · Replies 8 ·
Undergrad Choice of basis in BB84 protocol
- lys04
- · Replies 2 ·
Undergrad Time dependent Hamiltonian and energy
- hokhani
- · Replies 2 ·
Undergrad I want to understand how the transmission coefficient is obtained
- hmparticle9
- · Replies 3 ·
Undergrad Postulate of only time dependence on |ψ⟩
- LightPhoton
- · Replies 2 ·
Undergrad When does operator A(r)Ψ(r) equal ⟨r|Â|Ψ⟩?
- LightPhoton
- · Replies 2 ·
Undergrad A short attenuated laser pulse, LIGO, and a fast detector
- Spinnor
- · Replies 1 ·
Undergrad Using a single particle as quantum computer
- danielhaish
- · Replies 8 ·
High School Bell's Inequalities and the issue of non-locality
- Tolga T
- · Replies 59 ·
Undergrad Mean values of observables
- Vyurok
- · Replies 2 ·
Graduate Bell's inequality and experiment
- leonid.ge
- · Replies 8 ·
Undergrad States and observables in quantum mechanics
- Vyurok
- · Replies 5 ·
Undergrad Passing information faster than speed of light
- leonid.ge
- · Replies 20 ·