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.
Sub-forums
Threads
Undergrad Casimir effect force formula and plate mode frequencies
- raracon
- · Replies 1 ·
Undergrad Stern-Gerlach experiment superposition vs mixed state
- MichPod
- · Replies 2 ·
Graduate HHL quantum algorithm and the phase estimation
- marka909
- · Replies 1 ·
Graduate What are the quantum numbers used to label helium atom eigenfunctions?
- HomogenousCow
- · Replies 4 ·
Graduate Right Hand Rule in NMR and EPR?
- Narayanan KR
- · Replies 8 ·
Undergrad Online Experiment: Compton Scattering
- neilparker62
- · Replies 2 ·
Undergrad Why are terms like "deterministic" rarely used in Bell context
- greypilgrim
- · Replies 12 ·
Undergrad Plasmonic - Dielectric function
- LUFER
- · Replies 4 ·
Undergrad When does quantum entanglement occur?
- Spathi
- · Replies 5 ·
Undergrad Measurement of a qubit in the computational basis - Phase estimation
- Peter_Newman
- · Replies 3 ·
Undergrad General wave function solution for a particle in a 2-D box
- Hamiltonian
- · Replies 1 ·
Undergrad Is Information Really Preserved in Quantum Systems?
- LightningInAJar
- · Replies 8 ·
Graduate Quantum Field theory vs. many-body Quantum Mechanics
- Joker93
- · Replies 36 ·
High School Is it really possible to slap my hand through a table?
- Sciencelad2798
- · Replies 30 ·
High School Boundary between a particle in two energy states
- Rikrik
- · Replies 1 ·
High School How can a quantum object interact before it has definite properties?
- Joseph Flatt
- · Replies 4 ·
Undergrad Can We Always Determine Eigenfunctions for an Asymmetric Top?
- kelly0303
- · Replies 3 ·
Graduate The experiment for testing the CHSH inequalities
- Spathi
- · Replies 11 ·
Undergrad What is the difference between first and second-order vacuum polarization?
- raracon
- · Replies 10 ·
High School Why don't electrons always go through one slit in the double slit experiment?
- lukephysics
- · Replies 26 ·
Undergrad The distracted experimentalist's problem
- Heidi
- · Replies 12 ·
Undergrad Is the Fermi-Dirac distribution equal to zero at the state of highest energy?
- chikchok
- · Replies 1 ·
Undergrad CHSH inequality : renaming and absolute values
- jk22
- · Replies 2 ·
Undergrad Does entanglement of photons really facilitate telepathy?
- Unbowed_epicure
- · Replies 3 ·
Undergrad How Do Kochen-Specker Theorem and Contextuality Relate to Financial Markets?
- Killtech
- · Replies 3 ·
Undergrad The atomic Coulomb potential extends to infinity?
- aaronll
- · Replies 5 ·
Undergrad Do electrons or photons produce electromagnetic waves?
- Andreea007
- · Replies 14 ·
Undergrad How do photons transfer energy?
- Andreea007
- · Replies 3 ·
Undergrad Superluminal Quantum tunneling without FTL messaging
- artis
- · Replies 14 ·
Undergrad What do the psi_3 and psi_4 components of the Dirac equation represent?
- snoopies622
- · Replies 8 ·
High School If atoms are mostly vacuum, why do solid objects feel solid?
- Space
- · Replies 9 ·
High School Can Entangled Particles Stay Undetermined Despite Decoherence During Separation?
- Joseph Flatt
- · Replies 22 ·
High School Could a parallel universe exist?
- wannaberadiologist
- · Replies 11 ·
Undergrad Any other good sources on the Lamb shift other than Wikipedia?
- raracon
- · Replies 10 ·
Undergrad What is the connection between the Lamb Shift and the g factor?
- raracon
- · Replies 2 ·
High School Why do superpositions occur? What causes them to occur?
- Hazel Appraiasal
- · Replies 46 ·
Undergrad Are commuting observables necessary but not sufficient for causality?
- nomadreid
- · Replies 6 ·
Graduate Hamiltonian in second quantization
- hello_world30
- · Replies 4 ·
Undergrad Solving Schrodinger's eqn using ladder operators for potential V
- Hamiltonian
- · Replies 4 ·
Undergrad The definition of the spectra in quantum mechanics
- Asmaa
- · Replies 4 ·
Undergrad What gives an optimum value for electron energy to ionise atom?
- paul_iow
- · Replies 9 ·
Undergrad Where to find the Dirac equation for a physics paper
- raracon
- · Replies 1 ·
Undergrad Can Dirac Delta Functional Observables Be Regarded as True Quantum Observables?
- Killtech
- · Replies 4 ·
Undergrad What is the Complex Conjugate of a Hermitian Integral in QM?
- Mayhem
- · Replies 7 ·
Undergrad Gauge in the Aharonov Bohm effect
- KDPhysics
- · Replies 4 ·
Undergrad What is the Definition of Quantum Physics?
- zastras
- · Replies 41 ·
High School Objective-collapse theory, collapse for large objects
- TheHeraclitus
- · Replies 1 ·
Graduate Are gauge symmetries redundancies or physical symmetries?
- Demystifier
- · Replies 47 ·
Undergrad Understanding Bra Ket Correspondence and Proving (1.8) Transformation
- Kashmir
- · Replies 3 ·
Graduate What is the point of geometric quantization?
- andresB
- · Replies 4 ·
Graduate Can Quantum Mechanics be postulated to exclude humans?
- dextercioby
- · Replies 44 ·
Undergrad What is unique about the bra in Dirac bra-ket notation?
- Kashmir
- · Replies 14 ·
Undergrad Physical interpretation of phase in solutions to Schrodinger's Eqn?
- Dfault
- · Replies 12 ·
Undergrad Bra Ket is equivalent to inner product always?
- Kashmir
- · Replies 7 ·
Graduate QFT with vanishing vacuum expectation value and perturbation theory
- The Tortoise-Man
- · Replies 3 ·
Undergrad Weak measurement and the measurement problem
- Killtech
- · Replies 4 ·
High School Why exactly do Virtual Particles not violate Conservation of energy?
- raracon
- · Replies 16 ·
Graduate Interaction between matter and antimatter in Dirac equation
- lagrangman
- · Replies 5 ·
Undergrad Superposition Angle Range in 2-Slit Experiment
- Jsauce
- · Replies 6 ·
Graduate Why we can perform normal ordering?
- Jufa
- · Replies 4 ·
High School Is an experiment planned to discern determinism and randomness in QM
- Prishon
- · Replies 118 ·
Undergrad Why does the photoelectric effect require the particle model of light?
- physics1999
- · Replies 5 ·
Undergrad Quantization of Quasiperiodic Orbits in the Bohr-Sommerfeld Model
- Couchyam
- · Replies 5 ·
Undergrad Using the Schrodinger eqn in finding the momentum operator
- Hamiltonian
- · Replies 3 ·
Undergrad Feynman path integral and events beyond the speed of light
- kurt101
- · Replies 57 ·
High School Quantum vacuum fluctuations, Lamb shift, and Casimir effect
- raracon
- · Replies 1 ·
Undergrad On the meaning and mathematics of rotating spin 1/2 particles
- snoopies622
- · Replies 7 ·
High School Why isn’t quantum entanglement just correlation?
- lukephysics
- · Replies 51 ·
High School Project on pulsars/electromagnetic quantum field
- Lisastronomy
- · Replies 8 ·
Undergrad Problem involving a sequential Stern-Gerlach experiment
- AndersF
- · Replies 24 ·
High School Can the Motion of an Electron in Quantum Mechanics Be Reversed?
- ZIKA99
- · Replies 29 ·
Undergrad Can light meaningfully travel an infinite distance?
- SimplePrimate
- · Replies 28 ·
Graduate Max Fidelity at $$F=|\langle\psi|\phi\rangle|^2$$
- deepalakshmi
- · Replies 26 ·
Undergrad A quasi-analogy of wave-particle duality?
- Matty521
- · Replies 17 ·
Graduate Does the quantum space of states have countable or uncountable basis?
- MichPod
- · Replies 67 ·
Graduate What are the methods for calculating quantum phase transition?
- nik9039
- · Replies 2 ·
Undergrad Is time continuous or discrete in quantum physics?
- deepalakshmi
- · Replies 2 ·
Undergrad How does the oracle work in Grover's algorithm without knowing the solution?
- Malamala
- · Replies 1 ·
Undergrad Why can't classical models explain quantum entanglement?
- SimplePrimate
- · Replies 10 ·
Graduate Is wave-matter duality a proven theory?
- PVT_RV
- · Replies 58 ·
Graduate Quantum linear code/ Dual Code (CSS) proof
- steve1763
- · Replies 3 ·
Undergrad Quantum spin, wavelength and frequency
- Peter J Carroll
- · Replies 17 ·
Undergrad Math of Electron Double Slit Experiment
- Ghost Quartz
- · Replies 4 ·
High School Bell Test Configuration Question
- plmustard
- · Replies 3 ·
Graduate What Does Constant Fidelity in Quantum States Imply?
- deepalakshmi
- · Replies 1 ·
Undergrad ##H=i\hbar\frac{d}{dt}## is weird
- Foracle
- · Replies 13 ·
Undergrad 2D parity operator in spin space: why diag(1,1)?
- Malamala
- · Replies 1 ·
Undergrad Do measurements modify angular momentum and energy?
- Jarek 31
- · Replies 17 ·
High School Copenhagen Interpretation and collapse moment
- entropy1
- · Replies 2 ·
Undergrad Does vacuum fluctuation create real particles or just virtual ones?
- Haorong Wu
- · Replies 31 ·
Graduate Fidelity for quantum state at t=0
- deepalakshmi
- · Replies 21 ·
Graduate Is the Higgs Field Responsible for Microscopic Gravitational Effects?
- samalkhaiat
- · Replies 24 ·
Undergrad Why global phase doesn't matter in quantum two-level systems
- supernano
- · Replies 6 ·
Undergrad Derivatives for a density operator
- Haorong Wu
- · Replies 1 ·
High School Planck Length 1 Detector? Emitter?
- Silly Questions
- · Replies 35 ·
Graduate Are these papers on Quantum Electrodynamics true?
- jonjacson
- · Replies 2 ·
Undergrad Question about the Feynmann-Stuckelberg interpretation
- madScientist404
- · Replies 2 ·
Undergrad Schrödinger wave function: How to use it to get 3-D atomic orbitals?
- Tymothee Waldner
- · Replies 11 ·
Undergrad What types of forces are described in the standard minimal QED Lagrangian?
- LarryS
- · Replies 6 ·
High School Is quantum coherence a random event?
- arnell7
- · Replies 23 ·