Can someone help me understand this question please

  • Thread starter Thread starter nottobright
  • Start date Start date
nottobright
Messages
2
Reaction score
0
someone asked me this question and i don't understand it could anyone shed some light on what he is asking me


"If the Speed of Light is 186,300 MPS and the expansion rate of the Universe is roughly 10% advantageous to contracting and or collapsing in on itself, why wouldn't the end result be considered "Anti-Time"? And how would man, [numerically], correspond the Speed of Light to the change? "
 
Physics news on Phys.org
I believe part of your question is asking that if the Universe were to collapse it would essentially reverse time, Stephen Hawking once posited this but it was subsequently refuted by the concept of entropy. Essentially the amount of disordered states is infinite and there exists one ordered state (the beginning of the Universe). Statistically it is impossible to reverse time in that manner.
 
thanks Kevin
 
Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. Towards the end of the first lecture for the Qiskit Global Summer School 2025, Foundations of Quantum Mechanics, Olivia Lanes (Global Lead, Content and Education IBM) stated... Source: https://www.physicsforums.com/insights/quantum-entanglement-is-a-kinematic-fact-not-a-dynamical-effect/ by @RUTA
I am reading WHAT IS A QUANTUM FIELD THEORY?" A First Introduction for Mathematicians. The author states (2.4 Finite versus Continuous Models) that the use of continuity causes the infinities in QFT: 'Mathematicians are trained to think of physical space as R3. But our continuous model of physical space as R3 is of course an idealization, both at the scale of the very large and at the scale of the very small. This idealization has proved to be very powerful, but in the case of Quantum...
Thread 'Lesser Green's function'
The lesser Green's function is defined as: $$G^{<}(t,t')=i\langle C_{\nu}^{\dagger}(t')C_{\nu}(t)\rangle=i\bra{n}C_{\nu}^{\dagger}(t')C_{\nu}(t)\ket{n}$$ where ##\ket{n}## is the many particle ground state. $$G^{<}(t,t')=i\bra{n}e^{iHt'}C_{\nu}^{\dagger}(0)e^{-iHt'}e^{iHt}C_{\nu}(0)e^{-iHt}\ket{n}$$ First consider the case t <t' Define, $$\ket{\alpha}=e^{-iH(t'-t)}C_{\nu}(0)e^{-iHt}\ket{n}$$ $$\ket{\beta}=C_{\nu}(0)e^{-iHt'}\ket{n}$$ $$G^{<}(t,t')=i\bra{\beta}\ket{\alpha}$$ ##\ket{\alpha}##...
Back
Top