作用量
- Is the spin of a particle, aligining in one direction or the other, its internally available action, like a curled up dimension?
- Is many-worlds theory the flip-side of least-action ?
- Witten: "Principle of least action" is truly the "principle of stationary action". Is this a "principle of no action"?
- Why and how is action quantized?
- In what sense is a particle's spin its internal action?
- Why doesn't a mass pull on itself? How does it distinguish itself from all other masses? What is a mass?
- Are action and nonaction related?
Holistic quantity
- Action has the dimension energy-time or momentum-length, as with the Heisenberg uncertainty principle, or with angular momentum.
- Action is everything. It is divided, as with divisions of everything.
Principle of least action
- Path of least action (the basis for physics, namely, for Feynman diagrams) is violated by measurements, where we can wait and nothing happens.
- Least action means least conversion between potential energy to kinetic energy.
- Lagrangian L=T-V expresses slack (or anti-slack), makes the conversion between potential and kinetic energy as smooth as possible. Hamiltonian H=T+V expresses the totality, the love. In this sense, they are dual, as per the sevensome - the Lagrangian expresses the internal slack, and the Hamiltonian expresses the wholeness of the external frame.
Absolute and relative energy
- Potential energy is bounded from below.
- Kinetic energy is always positive, absolutely. Its relation to momentum is absolute, unconditional. Whereas potential is defined relatively and its relation to position is variable. The Yoneda lemma relates the absolute and the relative in this way.
- Energy is the amount of freedom available to do something independently different. The freedom comes from the slack in Heisenberg's uncertainty principle ΔEΔt. That principle manifests in the arisal of independent entities, independent subsystems, for example, the appearance of a pair of a particle and anti-particle.
Spacetime vs. Quantum
- Space time gives the geometry of action. Quantum physics quantizes action.
Mass
- Mass is a local resistance to action, as with kinetic energy.
- A mass contributes to gravity the component m/r and two such masses pulling on each other make for mM/r2.
Time
- A way to think of time. In time, a particle in a higher energy state will emit a photon and enter a lower energy state. This is perhaps a way of defining time, and also its directionality. The directionality is given by the difference between higher energy and lower energy in that there is a minimal energy but not a maximal energy.
Angular momentum
- Angular momentum has units of action times angle.
- {$h$} is a unit of angular momentum and {$ħ=\frac{h}{2\pi}$} is a unit of action.
Observer
- From the observed's point of view, in their framework, there is only action. But from the observer's point of view, there can be action or not.
- Action requires slack, a local discontinuity.