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How to learn QFT basics for a Feynman diagram integral
- ice109
- · Replies 8 ·
What Is the Normalization Constant for a 2-Electron Antisymmetric Spin Function?
- physgirl
- · Replies 5 ·
Calculate Size of Radius for Muonic Atom in Lithium-7
- touley
- · Replies 9 ·
Commutation relations for K = ±iσ/2 in Ryder QFT
- Jimmy Snyder
- · Replies 6 ·
Fermi Question - quantum tunnelling of a person
- PsiPhi
- · Replies 3 ·
Modeling soccer ball flight with drag and Magnus forces
- Grantismo
- · Replies 1 ·
Normalization of a wave function question
- shahramj
- · Replies 7 ·
Hamiltonian and ground state for 2N identical particles in harmonic potential
- Urvabara
- · Replies 9 ·
Is the Hamiltonian with a Complex Potential Hermitian?
- ehrenfest
- · Replies 11 ·
When is ψₑ(x) = A exp(ikx) + B exp(-ikx) a solution?
- ehrenfest
- · Replies 4 ·
Using Creation and Annihilation Operators in a Fermionic 2-State System
- Urvabara
- · Replies 11 ·
Probability current density equation: how can ∇Ψ be a vector?
- ehrenfest
- · Replies 1 ·
How to Show a Bound Energy State for V(x) = -aV_0δ(x)?
- ehrenfest
- · Replies 14 ·
Question form Peskin Schroeder
- Sombrero
- · Replies 1 ·
Why Must the Expectation Value of H Be at Least the Lowest Energy Eigenvalue?
- ehrenfest
- · Replies 10 ·
Free particle propagator on Gaussian wave packet from Shankar
- ehrenfest
- · Replies 7 ·
How Do You Normalize a Function to Unity?
- ehrenfest
- · Replies 3 ·
How Can Equation 5.1.9 Be Rewritten Using an Integral Over E?
- ehrenfest
- · Replies 16 ·
Time Evolution of the Gaussian packet
- ehrenfest
- · Replies 2 ·
Two-Particle System Wave Function with Distance-Dependent Potential?
- Eighty
- · Replies 3 ·
Propagator for a particle in free space
- plmokn2
- · Replies 6 ·
Covariant Derivative: What Is $\nabla^0 A_{\alpha}$?
- S.P.P
- · Replies 3 ·
Quick Potential Barrier tunnelling question
- Novocaine
- · Replies 1 ·
Deriving the Mass of Xi Baryon from Quark Interactions?
- kcirick
- · Replies 13 ·
How Do Bessel Functions Relate to Fourier Transforms in SHM Problems?
- rem
- · Replies 1 ·
How Does the Metric Affect Index Position in Tensor Contractions?
- S.P.P
- · Replies 3 ·
How does the number of paper clips attached to the cart affect acceleration?
- benzene
- · Replies 1 ·
Calculating Stark Effect for 3 States of Hydrogen
- kingOFleo
- · Replies 16 ·
How Is Work Calculated When Moving an Electron Between Two Spherical Shells?
- ku1005
- · Replies 2 ·
Polarisation of Light: Understanding Polaroid Sheets and Intensity Measurements
- ku1005
- · Replies 3 ·
Which Lasers Are Suitable for Fiber Optic Communication?
- CL39
- · Replies 2 ·
Do RGB Lasers Combine to Create White Light?
- n0_3sc
- · Replies 7 ·
Big Bang temperature, universe expansion, and nuclear formation
- y2jcapricorn
- · Replies 1 ·
Electron achievable resolution?
- ku1005
- · Replies 1 ·
Maximum photon energy in the photoelectric effect
- greenmachine
- · Replies 3 ·
High speed winds blowing over the ocean
- Signifier
- · Replies 2 ·
Equations for the initial and final momentum
- ehrenfest
- · Replies 18 ·
Fourier Transform of e-x*e-(x*coswt) w.r.t Frequency
- rem
- · Replies 2 ·
How to Choose the Correct Gaussian Surface for Calculating Electric Field?
- ku1005
- · Replies 12 ·
Textbook resources for φ³ interaction renormalization
- PhysiSmo
- · Replies 1 ·
How Do You Find the Density of a Cylinder?
- westside
- · Replies 3 ·
Strange slit / wave interference question
- bjraines
- · Replies 13 ·
Helium, ZPE, and Casimir Effect
- Blitz Kurt
- · Replies 9 ·
How does contrast resolution work in ultrasound?
- Joan B.
- · Replies 1 ·
Classical Mechanics: Body/Space Cone Angle Relation
- Rahat
- · Replies 1 ·
What is the difference between the equations for Doppler effect and relativity?
- Xeniebop
- · Replies 1 ·
Where can I find a proof for the mathematics of special relativity?
- gkalogeris
- · Replies 11 ·
Isothermal increase in pressure of solids
- ch1000_man
- · Replies 2 ·
How Can Luminosity and Temperature Ratios Be Deduced in Binary Star Systems?
- Darklord
- · Replies 2 ·
Phase Difference how do you calculate and why?
- ku1005
- · Replies 4 ·
Challenge problem from engineering professor
- turbotrip
- · Replies 3 ·
Effective Core Area - Fiber Optic Meaning
- n0_3sc
- · Replies 3 ·
How Is the Gaussian Integral Related to Averages?
- MadMax
- · Replies 12 ·
How Does Zero Total Energy Affect the Motion of a Charged Particle?
- nicktacik
- · Replies 3 ·
Understanding Conservation of Momentum and Energy in Ideal Quantum Experiments
- ehrenfest
- · Replies 3 ·
Shankar exercise 2.5.1 - Hamiltonian
- ehrenfest
- · Replies 8 ·
Recombination of plasma ions and electrons
- asdf1
- · Replies 2 ·
Reflection and transmission for electron step-down potential
- FunkyDwarf
- · Replies 4 ·
Error propagation in v² = u² + 2as
- kakab00
- · Replies 17 ·
Statistical Physics: Paramagnetic Solid with Spin S=1 and Magnetic Momentum µ_B
- ziad1985
- · Replies 1 ·
Some reaction between a proton and antiproton
- Ahmes
- · Replies 2 ·
Why Does My Normalized Star Flux Data Show a Bimodal Distribution?
- big man
- · Replies 1 ·
Archimedes (Buoyant force) Not EZ
- Jguth
- · Replies 4 ·
How Does Selenium Function in Xerography?
- shehri
- · Replies 2 ·
Poiseuille law and the Newtonian force
- alik
- · Replies 1 ·
Deriving equations on Einstein's 4th paper
- Xeniebop
- · Replies 1 ·
How Do Laplace and Poisson's Equations Derive from Gauss's Law?
- black_kitty
- · Replies 1 ·
Solve Viscosity Problem: Time for Equal Levels in 2 Cylinders
- neelakash
- · Replies 1 ·
How did they arrive at this equation?
- pivoxa15
- · Replies 2 ·
What is the significance of overlap in energy bands?
- Tsunami
- · Replies 1 ·
Why? exp(ixA)=cos(x)I+isin(x)A if A*A=I
- dream_chaser
- · Replies 4 ·
Relativistic electromagnetism problem
- carlo
- · Replies 7 ·
Realisability of the third law?
- pivoxa15
- · Replies 1 ·
Solving Heat Radiation Problem: Max Work from N Identical Containers
- neelakash
- · Replies 1 ·
Does this radioactive decay problem need relativistic momentum?
- neelakash
- · Replies 2 ·
Mechanics Problem: Time Period of Simple Pendulum with Uniform Rod and Mass m
- neelakash
- · Replies 2 ·
How does anomalous dispersion give a negative refractive index?
- n0_3sc
- · Replies 1 ·
Can the Commutation of Spin Operator and Magnetic Field Yield a Cross Product?
- n0_3sc
- · Replies 4 ·
What is the relationship between E and B in the wave equation?
- totalnewbie
- · Replies 6 ·
What is the proof for (∂u/∂T)_P=c_P – Pβv?
- neelakash
- · Replies 2 ·
Thermodynamics Problem: Exploiting Identity (∂s/∂T)_x>0
- neelakash
- · Replies 1 ·
Clausius and Kelvin-Planck statements of the 2nd law
- neelakash
- · Replies 1 ·
How Could Violating Kelvin-Planck Lead to a Breach of Clausius's Statement?
- neelakash
- · Replies 1 ·
Can Any Refrigerator Surpass a Carnot Refrigerator in Efficiency?
- neelakash
- · Replies 1 ·
Does refrigerator heat transfer violate the Clausius statement?
- neelakash
- · Replies 1 ·
Why does a heat engine not violate the Kelvin-Planck statement?
- neelakash
- · Replies 1 ·
Understanding Relative Motion: Observing Speeding Cars vs Stationary Cars
- WanWon
- · Replies 3 ·
Power balance analysis of some motor and generator
- freeboo
- · Replies 1 ·
Does Isothermal Heat Flow Out Contradict the Second Law of Thermodynamics?
- neelakash
- · Replies 3 ·
Solving Feynman Diagrams: Electron-Positron Scattering
- physics_fun
- · Replies 1 ·
Can the Second Law of Thermodynamics be Violated?
- neelakash
- · Replies 1 ·
Atomic physics: sodium D-line transition missing 2 pi
- El Hombre Invisible
- · Replies 1 ·
Proving Entropy→0 as Temperature→0
- angel 42
- · Replies 2 ·
A coil of wire is connected to an uncharged capacitor in a magnetic field
- ANON
- · Replies 2 ·
Why Is Proton-Antiproton Annihilation to a Single Photon Forbidden?
- malawi_glenn
- · Replies 14 ·
Finding Velocity and Pressure of Half-Sphere on Horizontal Plane
- Nea
- · Replies 2 ·
Can Gauss' Law Determine Intensity in Complex Spherical Charge Distributions?
- neelakash
- · Replies 13 ·
Creating a Physics Lab After AP Exam
- phunko
- · Replies 6 ·
Mag qs: Acceleration of Particle in Magnetic Field
- suldaman
- · Replies 2 ·
Tracing the U(235,92) + Neutron Process to Final Stable Nuclei
- Amith2006
- · Replies 1 ·