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  1. Why the Observable Universe Radius Exceeds Its Age

    Dec 13, 2015 · The radius of the observable universe is about 46 billion light years, which is considerably greater than its age of about 14 billion years.

  2. States & Observables: Are They Really Different? - Physics Forums

    May 13, 2023 · Usually states and observables are treated as fundamentally different entities in quantum theory. But are they really different? Yes, they are different. There are basic …

  3. The Universe vs Observable Universe - Physics Forums

    Jan 28, 2018 · The discussion revolves around the distinction between the observable universe and the entire universe, exploring concepts related to cosmology, the Big Bang, and the …

  4. Spatial Curvature in Cosmological Models - Physics Forums

    Mar 16, 2024 · The observable universe is the region from which light has had time to reach us since the Big Bang; it therefore has a finite radius and finite volume. By contrast, the term …

  5. Learn Observables in Mathematical Quantum Field Theory

    Nov 19, 2017 · The following is one chapter in a series on Mathematical Quantum Field Theory. The previous chapter is 6. Symmetries. The next chapter is 8. Phase space. 7. Observables In …

  6. Why is it giving me different observable canonical form?

    Mar 4, 2021 · The discussion revolves around discrepancies in the observable canonical form of a control system as computed by MATLAB's canon function compared to manual calculations. …

  7. The Born rule states that if an observable corresponding to a self-adjoint operator with discrete spectrum is measured in a system with normalized wave function (see Bra–ket notation), then

  8. Size of observable vs UN-observable Universe, etc - Physics Forums

    Apr 1, 2015 · The discussion revolves around the sizes of the observable and unobservable universe, particularly in the context of cosmic inflation and the implications of the universe's …

  9. Expectation of an operator (observable) how to calculate it

    Jan 31, 2017 · Some participants propose that the expectation value of an observable can be calculated using the integral involving the wavefunction and the operator, but question which …

  10. Spin 1/2 System: Eigenstates of Sz and Probability of Measurement

    Feb 18, 2014 · Possible states of system are |+>, |->Expected value ≠ Probability Expected value of observable A = sandwich of operator that gives observable A = ≠ Probability of …