<we><edit> <!-- questions and answers -->
pressure
fluid-dynamics
capacitance
everyday-life
speed-of-light
inertial-frames
universe
quantum-entanglement
energy-conservation
time
schroedinger-equation
field-theory
special-relativity
gauge-theory
charge
water
mathematical-physics
standard-model
mass
energy
operators
quantum-mechanics
orbital-motion
reference-frames
quantum-spin
quantum-mechanics
Could the the squared part of mc² indicate the radius of a bundle of energy confined to a closed loop compared to a particle of mass?
quantum-mechanics
energy
gravity
charge
Real eigenvalues of continuum spectrum of a self-adjoint operator
quantum-mechanics
operators
mathematical-physics
hilbert-space
eigenvalue
Hamiltonian of the surface states of a 3D topological insulator
quantum-mechanics
topological-insulators
Clarifying PT symmetry
quantum-mechanics
hamiltonian
parity
time-reversal-symmetry
cpt-symmetry
Time dependent Pauli matrices
quantum-mechanics
operators
quantum-information
density-operator
Time-Energy Uncertainty Relation when $A$ depends explicitly on $t$
quantum-mechanics
energy
time
heisenberg-uncertainty-principle
How can qubits be made indistinguishable?
quantum-mechanics
quantum-information
quantum-computer
identical-particles
Spectral theorem for unbounded self-adjoint (hermitian) operators
quantum-mechanics
operators
mathematical-physics
hilbert-space
resource-recommendations
Meaning of a Bra-ket inner product
quantum-mechanics
operators
hilbert-space
How are probabilities "physically real"?
quantum-mechanics
quantum-interpretations
Superfluids: what is the physics that predicts how thick is a Rollin film?
quantum-mechanics
fluid-dynamics
navier-stokes
superfluidity
bubble
Correlation amplitude and continuous spectra
quantum-mechanics
Doubt regarding Thomas banks equation about perturbation
quantum-mechanics
quantum-field-theory
Radial component of 2D Schrodinger equation for a linear potential
quantum-mechanics
homework-and-exercises
wavefunction
potential
schroedinger-equation
How is information related to energy in physics?
quantum-mechanics
energy-conservation
entropy
information
Maslov correction N-dimensional harmonic oscillator with different frequencies
quantum-mechanics
harmonic-oscillator
path-integral
semiclassical
What is the relation between eigenstate thermalisation and infinite heating in Floquet systems?
quantum-mechanics
many-body
non-equilibrium
floquet-theory
Quantum superposition follows from energy conservation? (possibly not a crackpot question. It's just an area of research in the fundamentals)
quantum-mechanics
energy-conservation
wavefunction
schroedinger-equation
superposition
Time dependent perturbation theory
quantum-mechanics
time
perturbation-theory
Proof an infinite dimensional/continous completeness relation $\int|x\rangle \langle x| dx=1$
quantum-mechanics
operators
hilbert-space
Speed and quantum number of a particle in gravity free space
quantum-mechanics
homework-and-exercises
Why was quantum mechanics regarded as a non-deterministic theory?
quantum-mechanics
probability
determinism
bells-inequality
Probability to measure certain energies
quantum-mechanics
homework-and-exercises
newtonian-mechanics
Why goes $i\rightarrow-i$ under $\mathcal{PT}$-transformation?
quantum-mechanics
commutator
complex-numbers
parity
time-reversal-symmetry
Question about Dirac notation
quantum-mechanics
Source of entropy production
quantum-mechanics
thermodynamics
Transitionless quantum driving for specific eigenstates
quantum-mechanics
adiabatic
Momentum and Higgs Fields
quantum-mechanics
quantum-field-theory
particle-physics
higgs
classical-field-theory
One-dimensional Wave Function Problem
quantum-mechanics
homework-and-exercises
what does antisymmetrizing mean when it comes to electrons?
quantum-mechanics
wavefunction
fermions
many-body
identical-particles
Reduced k vector in the first Brillouin zone
quantum-mechanics
solid-state-physics
harmonic-oscillator
crystals
phonons
Change of basis between bases with different rank
quantum-mechanics
How do I write an operator in Dirac notation?
quantum-mechanics
homework-and-exercises
operators
Polytopes in Quantum Mechanics
quantum-mechanics
quantum-information
bells-inequality
non-locality
Why does the azimuthal quantum number have a 0 value for s orbitals, 1 for p orbitals and 2 for d orbitals?
quantum-mechanics
atomic-physics
terminology
orbitals
Does time emerge from entanglement?
quantum-mechanics
time
quantum-entanglement
3-dimensional Fourier transform of an isotropic wavefunction (depending only on $r$)
quantum-mechanics
homework-and-exercises
fourier-transform
integration
How to obtain a vector relation for the Rabi frequency?
quantum-mechanics
homework-and-exercises
quantum-spin
What's the meaning of Quantum Mechanics?
quantum-mechanics
Finite square well boundary condition
quantum-mechanics
How do I calculate Holevo information when information is knowable in principle, but unknown?
quantum-mechanics
quantum-information
entropy
information
State of minimum uncertainty of a particle in an infinite square well
quantum-mechanics
hilbert-space
heisenberg-uncertainty-principle
variational-calculus
Energy quantization of double symmetric square-well potential
quantum-mechanics
homework-and-exercises
wavefunction
potential
schroedinger-equation
Delayed Choice Quantum Eraser without retrocausality?
quantum-mechanics
quantum-information
quantum-eraser
Two-body bound state in 3D
quantum-mechanics
superconductivity
Scattering cross section due to potential Barrier
quantum-mechanics
scattering-cross-section
When people say the human body vibrates at 62-72 Hz, what is vibrating?
quantum-mechanics
acoustics
vibrations
Time Reversal Operator in Sakurai's Book
quantum-mechanics
linear-algebra
time-reversal-symmetry
textbook-erratum
Confusion about rotations of quantum states: $SO(3)$ versus $SU(2)$
quantum-mechanics
group-theory
representation-theory
group-representations
lie-algebra
Measuring two components of angular momentum after measuring total angular momentum and one of its components
quantum-mechanics
homework-and-exercises
angular-momentum
hilbert-space
Numerical optimisation over quantum states/measurements
quantum-mechanics
quantum-information
optimization
Uncertainty and The Width of a Wave Packet in Bohm's Quantum Theory book
quantum-mechanics
waves
heisenberg-uncertainty-principle
Would we be able to be consistent in our theory if we were to only assume the particle nature of matter with the uncertainty principle
quantum-mechanics
particle-physics
waves
heisenberg-uncertainty-principle
wave-particle-duality
Can an Equation of Motion Do More?
quantum-mechanics
schroedinger-equation
differential-equations
equations-of-motion
What does the Holevo bound mean?
quantum-mechanics
quantum-information
entropy
information
Why Energy is greater than min value of Potential in Bound state?
quantum-mechanics
energy
schroedinger-equation
potential-energy
probability vs radial probability density
quantum-mechanics
probability
Spin direction for a bundle of electrons
quantum-mechanics
homework-and-exercises
electrons
quantum-spin
Heisenberg's Matrix Mechanics in two dimensions?
quantum-mechanics
Inflationary Question
quantum-mechanics
cosmological-inflation
Probability transition without approximation
quantum-mechanics
homework-and-exercises
Particle in a box momentum and position, expectation and uncertainty
quantum-mechanics
heisenberg-uncertainty-principle
Confusion about uncertainty principle
quantum-mechanics
statistical-mechanics
heisenberg-uncertainty-principle
estimation
order-of-magnitude
Spin of a particle in uniform magnetic field along arbitrary direction
quantum-mechanics
quantum-spin
time-evolution
Spin magnetic moment direction of a particle
quantum-mechanics
quantum-field-theory
quantum-spin
In the Principle of Least Action, how does a particle know where it will be in the future?
quantum-mechanics
newtonian-mechanics
classical-mechanics
lagrangian-formalism
action
Uncertainty Principle for Compound Objects Interpretation
quantum-mechanics
nuclear-physics
atomic-physics
heisenberg-uncertainty-principle
Wavefunction of a four electron system
quantum-mechanics
newtonian-mechanics
wavefunction
solving quantum master equation matrix form
quantum-mechanics
homework-and-exercises
density-operator
open-quantum-systems
How to derive the Schrödinger Equation from Heisenberg's matrix mechanics and vice-versa?
quantum-mechanics
wavefunction
schroedinger-equation
matrix-elements
How does the many-worlds theory explain why we perceive randomness?
quantum-mechanics
hilbert-space
probability
quantum-interpretations
randomness
„Linear Algebraic Explanation“ of Decay, Decoherence, Dephasing & Dissipation
quantum-mechanics
condensed-matter
quantum-information
quantum-optics
Confusion with bases
quantum-mechanics
angular-momentum
hilbert-space
Why is spinor along x-axis biased in terms of probability?
quantum-mechanics
quantum-spin
spinors
Spin of an electron (What is the meaning of spinor in terms of Hilbert space and Euclidian space?)
quantum-mechanics
quantum-spin
spinors
State of Spin 1/2 particle in a magnetic field
quantum-mechanics
homework-and-exercises
Wavefunction Collapse and Energy Conservation (and Stationary Tunneling)
quantum-mechanics
energy-conservation
measurement-problem
superposition
wavefunction-collapse
Hamiltonian reduction having constant of the motion
quantum-mechanics
hamiltonian-formalism
quantum-computer
Energy level splitting in a semiconductor
quantum-mechanics
atomic-physics
semiconductor-physics
pauli-exclusion-principle
How many 'independent ways' can you measure a quantum 2-state system
quantum-mechanics
Spin-1 Particle System Measuring Angular Momentum
quantum-mechanics
angular-momentum
quantum-spin
Quantum optics : homodyne detection
quantum-mechanics
photons
laser
quantum-optics
Is there a list of hydrogenic transition matrix elements online?
quantum-mechanics
resource-recommendations
atomic-physics
hydrogen
matrix-elements
Spin Operator in terms of Gamma-5
quantum-mechanics
angular-momentum
quantum-spin
dirac-matrices
I wanna learn Quantum Physics
quantum-mechanics
resource-recommendations
education
Why is force constant inversely proportional to the length of spring?
quantum-mechanics
Lorentz Invariance of Fermionic Bilinear Covariants
quantum-mechanics
special-relativity
lorentz-symmetry
What is the standard definition of "projector", "projection" and "projection operator"?
quantum-mechanics
operators
quantum-information
definition
linear-algebra
What are rabi oscillations?
quantum-mechanics
energy
particle-physics
condensed-matter
quantum-optics
Confusion on quantum numbers
quantum-mechanics
quantum-spin
Hubbard Model Hamiltonian
quantum-mechanics
operators
lattice-model
Why electron positron pair move oppositely inspite of attraction?
quantum-mechanics
gamma-rays
pair-production
Time-dependent perturbation theory derivation with 2-level system (Griffiths)
quantum-mechanics
homework-and-exercises
perturbation-theory
Relativistic Doppler effect and Quantum Mechanics
quantum-mechanics
general-relativity
visible-light
doppler-effect
Has anyone the knowledge of derivation of Hydrogen atom's eigenvalues using real only wave equation?
quantum-mechanics
wavefunction
schroedinger-equation
complex-numbers
Why is it intuitively unreasonable for this transition probability to grow quadratically in $t$?
quantum-mechanics
perturbation-theory
approximations
fermis-golden-rule
Mach-Zehnder probabilities
quantum-mechanics
experimental-physics
resource-recommendations
probability
interferometry
Fermionic statictics in SU(2) slave-boson representation
quantum-mechanics
condensed-matter
linear-algebra
Why can't you show that momentum is hermitian in Dirac notation?
quantum-mechanics
momentum
Is gravity ALREADY quantum?
quantum-mechanics
gravity
renormalization
quantum-gravity