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 Understanding how to reduce density matrices
- JD_PM
- · Replies 6 ·
Graduate Why does a photon have a defined frequency but is also somewhat localized?
- QuasarBoy543298
- · Replies 4 ·
High School Are Bohr's postulates the same as the Bohr-Bury scheme?
- JackFyre
- · Replies 3 ·
Undergrad Is this something like a Wick rotation?
- Heidi
- · Replies 23 ·
Undergrad What generates black-body photons?
- persab
- · Replies 6 ·
Undergrad Minimize grand potential functional for density matrix
- dRic2
- · Replies 1 ·
Undergrad Asking about Nuclear Magnetic Resonance
- docnet
- · Replies 7 ·
Undergrad Is there a way to translate a particle's spin into regular motion?
- Vanilla Gorilla
- · Replies 38 ·
Graduate Softened potential well / potential step
- hilbert2
- · Replies 5 ·
High School How does a wave collapse not violate the speed of light?
- TheCelt
- · Replies 3 ·
High School Time Crystals & Spin: Engineering a New Reality?
- Vanilla Gorilla
- · Replies 1 ·
Graduate Is there a vibration energy term associated with mesons?
- Pedro de la Torre
- · Replies 1 ·
Graduate Getting particle/antiparticle solutions from the Dirac Equation
- peguerosdc
- · Replies 6 ·
Undergrad Would Black Holes Be Coherent Under Quantum Mechanics?
- Vanilla Gorilla
- · Replies 3 ·
Graduate Finding the probability of making a measurement E1
- Vitani1
- · Replies 17 ·
Undergrad Properties of a unitary matrix
- JHansen
- · Replies 3 ·
Graduate Is the orthocomplement lattice of Hilbert space subspaces atomistic?
- forkosh
- · Replies 1 ·
Undergrad What is the effect of a magnetic field on an atom's magnetic moment?
- Malamala
- · Replies 19 ·
Undergrad The significance of the Dirac notation
- entropy1
- · Replies 100 ·
Undergrad Energy operator in Quantum Mechanics
- Mayan Fung
- · Replies 13 ·
Undergrad Is quantum entanglement just like ordering Schrodinger's Slice pizza?
- Wallace
- · Replies 8 ·
Graduate Wolfram Schommers Projection theory
- Keth
- · Replies 8 ·
Graduate Matrices from Spherical Harmonics with Eigenvalue l+1
- paklin2
- · Replies 14 ·
Undergrad What does an uncertainity of 0 mean?
- CrosisBH
- · Replies 4 ·
Graduate Suggested reading for quantum information applications in QFT
- DrEadgbe
- · Replies 2 ·
Undergrad Extraction of a particular quantum state from a quantum circuit
- ubergewehr273
- · Replies 7 ·
High School Do opposite-axis spin operators simultaneously determine eigenvalues?
- etotheipi
- · Replies 7 ·
High School Wave-Particle Duality Controlled by Single-Photon Self-Entanglement
- Lord Crc
- · Replies 13 ·
High School Does the energy 6.626x10^-34J have any special meaning?
- qnt200
- · Replies 26 ·
Graduate Representation of Z2 acting on wavefunctions
- QFT1995
- · Replies 3 ·
Undergrad Is the wave function a vector or a scalar?
- lightarrow
- · Replies 11 ·
Undergrad Measurement of an entangled Particles in two Different Bases
- randomuser3210
- · Replies 1 ·
High School What is the pattern in a double slit experiment near the slits?
- Heidi
- · Replies 16 ·
Undergrad How to find the photon's path?
- jk22
- · Replies 8 ·
High School Does an electron have kinetic energy when attached to a proton?
- Lolicon
- · Replies 8 ·
High School What does the unit "Js" of the Planck constant mean?
- Fouzan Alaa Almassry
- · Replies 9 ·
Graduate Heisenberg equations of Klein-Gordon Field in Space-Time
- Haorong Wu
- · Replies 41 ·
Undergrad Does intrinsic (e.g., spin) imply elementary (irreducible)?
- nomadreid
- · Replies 9 ·
High School How do photons and other particles gain or lose energy?
- lazarericus
- · Replies 8 ·
High School Quantum Entanglement Communication Radio
- pavqw
- · Replies 1 ·
Undergrad What is the paradox in the EPR paradox?
- bksree
- · Replies 2 ·
Undergrad What does uncertainty mean in Heisenberg's uncertainty principle?
- peguerosdc
- · Replies 10 ·
High School How does the electric field of an electron compare to its probability wave?
- DarkMattrHole
- · Replies 5 ·
Graduate Understanding Cartan subalgebra applied to the n-harmonic oscillator
- JD_PM
- · Replies 6 ·
Graduate Discussing the mathematical formalism of generators (Lorentz Group)
- JD_PM
- · Replies 31 ·
High School How to differentiate b/w two collapsed values in Bell States
- randomuser3210
- · Replies 12 ·
Graduate Trying to make sense of the double slit "experiment"
- Claude
- · Replies 5 ·
Undergrad QED - ordering of Feynman diagram rules
- tomdodd4598
- · Replies 6 ·
Undergrad Measuring Entangled Particles in two different Basis
- randomuser3210
- · Replies 8 ·
Undergrad A query regarding Rotational Invariance
- Student149
- · Replies 29 ·
Undergrad Did anyone create an antihydrogen beam to test if antimatter reverses time?
- LightningInAJar
- · Replies 9 ·
Undergrad Possible paradox in the uncertainty principle?
- PreposterousUniverse
- · Replies 16 ·
High School Simulators for Quantum Mechanics
- wolfy
- · Replies 2 ·
Undergrad A query regarding Spin Entanglement Measurement
- Student149
- · Replies 12 ·
High School Can spontaneous emission be considered a thermodynamic process?
- Karl Coryat
- · Replies 4 ·
Undergrad Stern-Gerlach w. normal distribution if magnets were more separated?
- ndvcxk123
- · Replies 5 ·
High School When the wave function collapses, how long is it collasped?
- wolfy
- · Replies 14 ·
Undergrad Is wavefunction collapse the same as zero variance of an observable?
- PORFIRIO I
- · Replies 2 ·
Undergrad Has this photon experiment ever been done?
- iamcj
- · Replies 4 ·
Undergrad Second-order perturbation theory with parity-odd Hamiltonian
- Malamala
- · Replies 3 ·
High School A few basic questions about the absorption/emission of photons
- Hiero
- · Replies 4 ·
Undergrad Two slit experiment with different sized slits
- Cato
- · Replies 2 ·
High School When are particles in a superposition of states?
- AidenPearce
- · Replies 2 ·
Undergrad Maxwell's Demon and the Uncertainty Principle
- iVenky
- · Replies 6 ·
Undergrad Are photons and light waves equivalent?
- thaiqi
- · Replies 7 ·
Graduate Boundary conditions of eigenfunctions with Yukawa potential
- Riccardo Marinelli
- · Replies 2 ·
Graduate Invariance of discrete Spectrum with respect a Darboux transformation
- QuantumDuality
- · Replies 1 ·
Undergrad Physics from Symmetry: Highly recommended for learning QM
- bhobba
- · Replies 48 ·
Undergrad I don't understand about infinitesimal translation
- Another
- · Replies 4 ·
Undergrad Does vacuum excitation violate the conservation of energy?
- Haorong Wu
- · Replies 7 ·
Undergrad Entanglement of Electrons Through Experiments: What's Possible?
- DarkMattrHole
- · Replies 1 ·
Undergrad What are time crystals and how do they differ from regular crystals?
- Hsopitalist
- · Replies 7 ·
Undergrad Is the small world uncertain, or is that just our perception?
- bt101
- · Replies 13 ·
Undergrad Measurement of Entangled Particles causes up or down spin?
- CarawayBlossom
- · Replies 3 ·
High School Time-reversal of an unknown quantum state
- allisrelative
- · Replies 1 ·
Undergrad Superposition of large objects
- entropy1
- · Replies 26 ·
Undergrad Microscopic and macroscopic physics
- iVenky
- · Replies 2 ·
Undergrad Photon Momentum: The Impact of Light on Movement in Space
- Ebi
- · Replies 3 ·
High School Speed of electrons in a 2-slit experiment
- jeremyfiennes
- · Replies 9 ·
Undergrad Confused about the AC Stark effect
- BillKet
- · Replies 5 ·
Undergrad Are Coin Flips Truly Random Like Quantum Systems?
- Isaac0427
- · Replies 3 ·
Undergrad What Do Phase Space Path Integrals Compute?
- Intrastellar
- · Replies 6 ·
Undergrad Condtion on transformation to solve the Dirac equation
- Markus Kahn
- · Replies 5 ·
High School Do photons, phonons and electrons have mass?
- SSG-E
- · Replies 60 ·
Graduate There is a high concentration of introductory material on wave-particle duality
- cdux
- · Replies 2 ·
High School Can a particle / wave pass through a sheet of material?
- MikeeMiracle
- · Replies 4 ·
High School Uncertainty Principle versus spin alignment
- hvo
- · Replies 2 ·
Undergrad Quantum Eraser: do entangled photons arrive at different moments?
- Leonardo Muzzi
- · Replies 1 ·
Graduate Compton Recoil and the Electron Differential Cross Section
- RoadDog
- · Replies 6 ·
Graduate Quantum Ising model correlation function query
- Danny Boy
- · Replies 1 ·
Undergrad Physically acceptable solutions to the Schroedinger equation?
- etotheipi
- · Replies 9 ·
Undergrad How to prove that some fields are different aspects of one general field?
- SEYED2001
- · Replies 11 ·
Undergrad Changing the effective mass of an electron using electric potentials?
- jcap
- · Replies 1 ·
Undergrad Conductors and weak interaction
- snorkack
- · Replies 8 ·
Undergrad Relation between spin and solar winds
- QuasarBoy543298
- · Replies 7 ·
Graduate How does one make a macroscopic object?
- Paul Colby
- · Replies 28 ·
Undergrad The reference frame for angular momentum components
- hokhani
- · Replies 3 ·
High School Does the future affect the past in a quantum world?
- Froskersss
- · Replies 5 ·
Undergrad How does molecular symmetry relate to allowed rotational quantum states?
- JohnnyGui
- · Replies 9 ·
High School Why does recombining Stern-Gerlach beams restore the original spin state?
- Jehannum
- · Replies 13 ·