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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.

Quantum Interpretations and Foundations

Graduate Universal quantum physics
Undergrad Free Schroedinger equation: time separation
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Undergrad I would like an explanation of these extra energy states
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Graduate Does Causality in QFT Require Commuting Field Operators Outside the Light Cone?
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High School General question about series limits and strong lines of the emissions spectrum
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Graduate Time Reversal and initial conditions
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Undergrad Choice of basis in BB84 protocol
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Undergrad Time dependent Hamiltonian and energy
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Undergrad I want to understand how the transmission coefficient is obtained
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Undergrad Postulate of only time dependence on |ψ⟩
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Undergrad When is Â(r) Ψ(r) = ⟨r | Â | Ψ⟩?
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Undergrad A short attenuated laser pulse, LIGO, and a fast detector
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Undergrad Using a single particle as quantum computer
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High School Bell's Inequalities and the issue of non-locality
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Undergrad Mean values of observables
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Graduate Bell's inequality and experiment
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Undergrad States and observables in quantum mechanics
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Undergrad Passing information faster than speed of light
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Undergrad Energy and momentum in quantum mechanics
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High School Double-slit with movable detector screen
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Undergrad QED replacing photon field with current in 3-point function
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Undergrad Expansion of position kets in terms of angular momentum
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High School About the nature of the Newtonian gravitational formula
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Graduate Numerical implementation of creation and annhilation operators in the SSH model
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Undergrad Particle field strength and sensitivity
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Graduate 2nd Quantization states
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Undergrad Heisenberg uncertainty principle and the canonical momentum operator
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High School Heisenberg Uncertainty Principle question
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Graduate Coleman: "Spin is a concept that applies only to particles with mass"
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Undergrad More double slit experiment questions
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Undergrad Matrix element involving raising/lowering operators
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High School Has a Double Slit Experiment Been Conducted in a Vacuum Tube?
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Undergrad Confused about a matrix element
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Undergrad Position operator explicit form
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Undergrad Commutation of position operators in three dimensions
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Undergrad Qubit two-state quantum system
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Undergrad Another Interferometry question please
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Undergrad Can Topological Protection Extend the Lifetime of a Qubit?
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Undergrad Relation between operators and their variables' signs
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High School Can a filter based on the photoelectric effect reduce the noise floor?
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Undergrad Incomprehension of a simple interferometer?
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Undergrad Double-dark Slit Interference Pattern?
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Undergrad What kind of integration is Berezin integration?
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High School The Story of Least Action and the Double Slit
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Undergrad Please help me understand the double slit experiment and conclusion
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Undergrad Understanding the proof of Goldstone theorem
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Undergrad Quick question regarding creation/annihilation operators
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High School Are the electron and neutrino that are emitted in a beta decay entangled?
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Undergrad Homemade double slit experiment
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Undergrad Have You Heard of the SEW Experiment? Thoughts?
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Graduate Does x affect the value of [a^2,(a^†)^2×e^2ikx]
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Undergrad Clarifying the Superposition Principle
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Undergrad The physical components in the electron double slit experiment
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High School How does light have energy to follow infinite paths?
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High School The arrow of time (again)
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High School Yet another double slit thought experiment...
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High School Probability function for the position of a static electron under no potential
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High School Photoelectric phenomenum can only be proved as a particle effect?
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Undergrad Femto-photography Michelson Morley Interferometer thought experiment
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High School Would Laplace's Demon work?
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Undergrad Quantum fields and "mediator" particles
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High School Why is gravity a weak force at the atomic scale?
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High School Electron absorbs photon, but what happens to the photon?
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Undergrad Entropic Tension Cosmology (ETC) 1.0
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Undergrad What Are the Key Questions and Challenges in Understanding Quantum Gravity?
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High School Quantum Field Theory As Simple As Possible
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Undergrad Far off resonant Rabi oscillations in a 2 level system
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Undergrad Different expressions about time reversal and confusion
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Undergrad Is the result of an operator acting on a ket vector always a ket？
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Undergrad Double Slit Experiment: Measurement versus Observation
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Undergrad Deriving the time-dependent wave equation from Energy eigenfunctions
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Undergrad How Much Pressure To Cause Matter To Degenerate?
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Undergrad Particle in Infinite Square Well
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Undergrad Particle in a potential well
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Undergrad Feynman's summing arrows for photon amplitudes applied to LIGO?
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Undergrad Laws of thermodynamics and their application to quantum physics
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Undergrad Explanation of the Bohr postulates' existence
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Undergrad Can two photons combine to give a local field with spin 2?
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Undergrad Physical Meaning of Atomic Oscillations
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Graduate Pauli spin matrices
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Undergrad The Pauli-Lubanski vector and angular momentum
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Undergrad Chunks of action smaller than Planck's constant
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Undergrad What effect do gravitons have on electrons?
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Graduate Collapse of the electron wave function due to inelastic interactions
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Undergrad Question regarding quantum mechanics from relativity perspective
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Undergrad Normalisation Constant In Wavefunction
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Graduate Has Hilbert transform ever been used in Quantum Theory?
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Undergrad What do the wave functions of real particles look like?
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Undergrad Uniqueness of quantum numbers
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Undergrad Time dependent Schrödinger equation - Separable Solutions
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Undergrad Is Newton the founder of quantum gravitation?
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Undergrad Lower energy levels with Dirac/Pauli theory than Schroedinger theory?
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Undergrad Amount of electrons in nuclei
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Undergrad System of bosons
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Undergrad Exchange symmetry of two particles on a sphere
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Undergrad The probability density of a wave function due to length contraction
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Undergrad 3 photon transfer probability
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Undergrad Motivating the form of a bra vector
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Undergrad How is superposition demonstrated?
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Undergrad Physics Today article collection
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High School Quantum wavelength of gravity
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