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Semiclassical
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Why do we obtain classical physics by taking the limit of Planck's constant to zero?
December 29th, 2020
quantum-mechanics
semiclassical
classical-mechanics
physical-constants
How can the Huygens-Fresnel principle be derived from the Maxwell equations?
February 9th, 2020
maxwell-equations
electromagnetic-radiation
huygens-principle
semiclassical
diffraction
Landau & Lifshitz's Approach (contour method) on the WKB connection formulas
January 12th, 2021
analyticity
quantum-mechanics
wavefunction
schroedinger-equation
semiclassical
Classical Limit of the Feynman Path Integral
August 10th, 2020
path-integral
quantum-mechanics
classical-mechanics
semiclassical
Bohr-van Leeuwen theorem and quantum mechanics
June 15th, 2020
electromagnetism
quantum-mechanics
semiclassical
statistical-mechanics
What is a 'turning point' in WKB and why does it fail at that point?
April 4th, 2020
quantum-mechanics
wavefunction
schroedinger-equation
semiclassical
asymptotics
Probability conservation in WKB tunneling
August 1st, 2022
semiclassical
quantum-mechanics
s-matrix-theory
unitarity
quantum-tunneling
Eikonal approximation in QFT
May 18th, 2020
quantum-field-theory
scattering
semiclassical
On Groenewold's Theorem and Classical and Quantum Hamiltonians
March 10th, 2021
deformation-quantization
semiclassical
quantum-mechanics
hamiltonian
phase-space
Bohr-Sommerfeld quantization condition from the WKB approximation
September 12th, 2020
semiclassical
schroedinger-equation
wavefunction
quantum-mechanics
quantization
Semiclassical limit of Quantum Mechanics
October 17th, 2020
quantum-mechanics
lagrangian-formalism
path-integral
action
semiclassical
Does spin really have no classical analogue?
November 19th, 2020
angular-momentum
quantum-mechanics
classical-mechanics
quantum-spin
semiclassical
Tree-level QFT and classical fields/particles
August 6th, 2022
classical-mechanics
semiclassical
classical-field-theory
perturbation-theory
quantum-field-theory
Why did the Bohr Model Successfully calculate some of the energy levels in hydrogen?
August 1st, 2022
atomic-physics
quantum-mechanics
history
semiclassical
Do Maxwell's equation describe a single photon or an infinite number of photons?
December 4th, 2020
semiclassical
maxwell-equations
quantum-electrodynamics
photons
How is the Saddle point approximation used in physics?
August 25th, 2020
integration
mathematics
approximations
semiclassical
How does one quantize the phase-space semiclassically?
August 1st, 2022
hamiltonian-formalism
classical-mechanics
quantum-mechanics
semiclassical
phase-space
How can Planck's constant take different values?
August 1st, 2022
deformation-quantization
quantum-mechanics
physical-constants
semiclassical
Why does electron orbital circumference have to be in multiples of de Broglie wavelengths?
August 1st, 2022
wavelength
atomic-physics
quantum-mechanics
semiclassical
Sommerfeld's modifications to Bohr's atomic model
August 1st, 2022
quantum-mechanics
classical-mechanics
atomic-physics
semiclassical
How to apply the WKB approximation in this case?
December 15th, 2020
schroedinger-equation
approximations
semiclassical
quantum-mechanics
homework-and-exercises
Computing a density of states of Hamiltonian $ H=xp$
April 5th, 2021
hamiltonian
semiclassical
density-of-states
quantum-mechanics
quantization
Transition from quantum to classical mechanics
July 26th, 2020
quantum-mechanics
classical-mechanics
semiclassical
action
WKB approximation for multiple turning points
July 23rd, 2020
semiclassical
approximations
eigenvalue
perturbation-theory
schroedinger-equation
WKB Quantization Condition - negative?
August 1st, 2022
schroedinger-equation
quantum-mechanics
semiclassical
approximations
Why does the Bohr-Sommerfeld quantization for give the exact energy-levels for a harmonic oscillator?
August 1st, 2022
semiclassical
quantum-mechanics
supersymmetry
harmonic-oscillator
What is the correct expression for phase velocity of a relativistic free particle?
August 1st, 2022
quantum-mechanics
phase-velocity
special-relativity
waves
semiclassical
WKB Approximation on an linear + harmonic potential
August 1st, 2022
potential
quantum-mechanics
semiclassical
homework-and-exercises
schroedinger-equation
Bohr-Sommerfeld quantization for different potentials
August 1st, 2022
wavefunction
semiclassical
quantum-mechanics
potential
How can I use a magnet to lift a paperclip?
August 1st, 2022
magnetic-fields
classical-mechanics
electromagnetism
semiclassical
quantum-spin
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