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 Things that do not depend on the choice of Cauchy surface
- naima
- · Replies 1 ·
High School Watching the double-slit experiment affects the results?
- quantumdave
- · Replies 47 ·
Graduate Learning Quantum Mechanics with Dirac: Understanding Ket Vectors
- Einstein's Cat
- · Replies 4 ·
Graduate Projector augmented wave method
- Tanaka
- · Replies 2 ·
Graduate Path integral propagator as Schr's eq Green's function
- ShayanJ
- · Replies 21 ·
Graduate Question about higher dimensions and what connects them
- Cody Richeson
- · Replies 4 ·
Graduate Schwarzschild Diameter of One Quantum of Energy
- Ontophobe
- · Replies 9 ·
Graduate Why we never see a rational charge?
- SlowThinker
- · Replies 11 ·
Graduate Finding a unitary transformation between two quantum states.
- Qubix231
- · Replies 7 ·
Undergrad Can a photon have any frequency or only certain specific?
- Yaraeovento
- · Replies 5 ·
Graduate Idea concerning Quantum Entanglement
- Daniel K
- · Replies 6 ·
Graduate Interaction picture - time evolution operator
- Faust90
- · Replies 1 ·
Graduate Cheshire Cat Experiment in July Issue of Nature
- RUTA
- · Replies 8 ·
Graduate Instantaneous action in potential
- gonadas91
- · Replies 11 ·
Graduate What is "Modern Quantum Simulation" experimentation?
- Gerinski
- · Replies 1 ·
Undergrad Precession of angular momentum in vector model
- Jan Hidding
- · Replies 4 ·
Graduate How can a particle be a combination of other particles?
- Buzz Bloom
- · Replies 45 ·
Graduate Four Classes of Quantum Mechanical Effects are Independent?
- Islam Hassan
- · Replies 2 ·
High School Does Observation Create Reality in Quantum Physics?
- question99
- · Replies 28 ·
High School Why does the complex conjugate of psi pop out?
- Indianspirit
- · Replies 3 ·
Graduate The momentum representation of ##x## and ##[x,p]##
- Pring
- · Replies 17 ·
Graduate Intuitive idea for chaotic light statistics?
- Affcr
- · Replies 4 ·
Graduate What is VigLink and How Does it Affect Links on Physicsforums?
- HeavyWater
- · Replies 10 ·
Graduate The physical derivation of annihilation operator?
- Pring
- · Replies 13 ·
Insights Higher Prequantum Geometry I: The Need for Prequantum Geometry - Comments
- Urs Schreiber
- · Replies 15 ·
Graduate Matrix method to find coefficients of 1-d S.E.
- davidbenari
- · Replies 10 ·
Graduate Spin Operators: Axial for QM, Polar in Clifford Algebra?
- Elemental
- · Replies 7 ·
Graduate What is a Label? QM & QFT Explained
- resurgance2001
- · Replies 3 ·
Graduate Understanding Electron Chirality and Scalar Conservation
- kimcj
- · Replies 7 ·
Graduate How Does the Angular Momentum Commutator Derive the Lorentz Algebra?
- spaghetti3451
- · Replies 3 ·
Graduate Chance of building practical quantum computers
- mok-kong shen
- · Replies 3 ·
Graduate Understanding Qubits: How Superposition Powers Quantum Computers
- T-Oreilly
- · Replies 5 ·
Graduate Quantum Communication: Instant Transmission of Messages?
- Jim Hasty
- · Replies 5 ·
Graduate Quantum Hilbert Hotel: Endless Possibilities
- DrClaude
- · Replies 0 ·
Graduate How to; polarized reaction ee--->WW
- moss
- · Replies 2 ·
Graduate Delayed choice quantum eraser by Kim et al.
- Dadface
- · Replies 2 ·
Graduate How Do Complex Numbers Affect Ket Vectors in Quantum Mechanics?
- Einstein's Cat
- · Replies 3 ·
Graduate Using completeness relation to find <Omega>=0
- ChemicalTom
- · Replies 3 ·
Graduate Why does quantum entanglement not allow ftl communication
- macd
- · Replies 103 ·
Graduate Delayed Choice Quantum Eraser: Am I missing something here?
- SpaceKidd_N7
- · Replies 5 ·
Graduate Trouble understanding the wave function
- tomdodd4598
- · Replies 20 ·
Graduate Can you determine if a string of particle pairs is composed of entangled pairs?
- MartijnWetering
- · Replies 3 ·
Graduate How do I set up a delta potential well with an infinite potential wall?
- maverick_76
- · Replies 2 ·
Graduate Does the Heisenberg Uncertainty Principle Imply Energy Nonconservation?
- Multiple_Authors
- · Replies 2 ·
Graduate Vacuum energy spectrum, density and constant term....
- asimov42
- · Replies 3 ·
Graduate Spin Quantum Number: Why Just Z Component?
- Sheldon Cooper
- · Replies 5 ·
Graduate Can Vacuum Fluctuations Lead to Electron-Positron Annihilation?
- asimov42
- · Replies 4 ·
Graduate Addresses of Parallel Universes
- Adam LeTrexane
- · Replies 11 ·
Graduate Quantum Contextuality: Learn with Books & Articles
- omidaut
- · Replies 3 ·
Graduate Contour integral example from "QFT for the gifted amatueur"
- marcom
- · Replies 2 ·
Graduate Can one derive the photon number / phase uncertainty relation
- snoopies622
- · Replies 2 ·
Insights Misconception of the Heisenberg Uncertainty Principle - Comments
- ZapperZ
- · Replies 26 ·
Graduate How Can Orbital Angular Momentum be Used to Enhance Key Rate Generation in QKD?
- kaje
- · Replies 4 ·
Graduate Is Determinism Really Broken in Spin Measurements?
- giulio_hep
- · Replies 4 ·
Graduate Exponentials or trig functions for finite square well?
- baouba
- · Replies 2 ·
Graduate What does the potential barrier energy measure?
- iScience
- · Replies 5 ·
Graduate Understanding Qubits and Complex Scalars: The Role of Imaginary Numbers
- kaje
- · Replies 3 ·
Graduate Bell Test Violates Local Realism w/ Loophole-Free Electron Spins 1.3km Apart
- jim mcnamara
- · Replies 63 ·
Graduate Depiction of distribution of photons over time
- entropy1
- · Replies 3 ·
Graduate Equations for Entanglement and the Double Slit Experiment: A Layman's Guide
- renkma
- · Replies 34 ·
Graduate Energy conservation and michelson interferometers
- Danyon
- · Replies 2 ·
Undergrad F = (1/4)(n2/n1)2[1-{(n1-n2)/(n1+n2)}2] ?
- Huiling
- · Replies 2 ·
Graduate Can Free Electrons in a Vacuum Become Entangled?
- idea2000
- · Replies 3 ·
Graduate Understanding Spin-Orbit Coupling in Quantum Mechanics
- fayled
- · Replies 8 ·
Graduate Quantum observation of black hole?
- Green dwarf
- · Replies 5 ·
Graduate What is the mathematical function for the atomic orbital?
- Coolamebe
- · Replies 5 ·
Graduate Invariance of integration measure under shifts in field
- "Don't panic!"
- · Replies 2 ·
Insights Examples of Prequantum Field Theories II: Higher Gauge Fields - Comments
- Urs Schreiber
- · Replies 0 ·
Graduate Conservation of energy violation of galvanic cell electron
- ddesaneis
- · Replies 1 ·
Graduate Characterization of a gauge theory in terms of observables
- DrDu
- · Replies 10 ·
Insights What Does As a Sheaf of Functions on Phase Space Mean?
- Urs Schreiber
- · Replies 12 ·
Graduate Peskin and Schroeder - Derivation of equation (2.45)
- spaghetti3451
- · Replies 2 ·
Graduate Quantum No-Deletion/No-Partial Erasure vs. Measurement
- Ruik
- · Replies 5 ·
Insights Examples of Prequantum Field Theories I: Gauge fields - Comments
- Urs Schreiber
- · Replies 1 ·
Graduate Kubo formula for thermopower (Seebeck coefficient)
- lyuchn
- · Replies 1 ·
Graduate First loophole-free Bell test?
- bohm2
- · Replies 82 ·
Graduate Gauge fixing and gauge transformations
- "Don't panic!"
- · Replies 9 ·
Graduate If A is Bloch function, then <A(k,x)|dA(k',x)/dx>=δ(k,k')?
- zhanhai
- · Replies 2 ·
Graduate What alternatives exist for building a qubit without material deposition?
- Robin_Shorrosh
- · Replies 3 ·
Graduate The boundary condition for ##\delta## function
- Pring
- · Replies 5 ·
Graduate Is Boltzmann's Phase Cell Assumption Contradictory?
- Sheldon Cooper
- · Replies 14 ·
Graduate "Reading" Schrodinger's equation
- Vinay080
- · Replies 23 ·
Graduate What is the significance of the factor (2π)^3 in the completeness relation?
- spaghetti3451
- · Replies 7 ·
Undergrad Understanding the Wave Function: Time, Distance, and Confusion Explained
- Sobhan
- · Replies 13 ·
Graduate Field Theory vs Lattice: Why Do Calculations Yield Different Results?
- gonadas91
- · Replies 3 ·
Graduate Ladder operators in Klein -Gordon canonical quantisation
- spaghetti3451
- · Replies 5 ·
Graduate How do I plot this probability density over time?
- baouba
- · Replies 3 ·
Insights What Are the Local Observables in Higher Prequantum Geometry?
- Urs Schreiber
- · Replies 1 ·
Graduate What is the purpose of introducing the spin state along H
- Pring
- · Replies 2 ·
Graduate Eigenfunctions of the angular momentum operator
- klpskp
- · Replies 1 ·
Graduate Multiple Measurements of a single Qubit
- Ruik
- · Replies 4 ·
Graduate Comparison between quantum entanglement and a classical version
- Adel Makram
- · Replies 142 ·
Graduate Can Any Traceless Self-Adjoint 2x2 Matrix Be Expressed Using Pauli Matrices?
- Frank Einstein
- · Replies 2 ·
Graduate How to Represent Eigenvectors in Column Matrix Form Using Bra-Ket Notation?
- iAlexN
- · Replies 7 ·
Graduate Diffraction in a single slit setting
- Ramesh Manian
- · Replies 3 ·
Graduate Dispersion operator in quantum mechanics
- Ananthan9470
- · Replies 1 ·
Graduate Dirac equation and structure of spacetime
- sandy stone
- · Replies 3 ·
Graduate Correlation funciton of a system with translational symmetry
- Jeremy1986
- · Replies 5 ·
Graduate Minimizing energy for external field
- ftft
- · Replies 1 ·
Graduate Particle in Ring: Solving Standing Wave
- maverick_76
- · Replies 6 ·