B Multiverse with and without me

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Tony Dempsey
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Hi All
I'm a new comer to this forum, excuse my posting a question in a reply section but I can't find where to post a question.

I just want to put forward a thought I had in relation to the existence of the multiverse idea, here in lies my query: if all my possible outcomes in my life are played out in the multiverse, then how can all possible outcomes for my children's lifes be played out in the multiverse if in one or more of thoes universes I have no children, taking that thought and idea back one generation to my parents and their decisions to have children and the chances that they have any in the first place makes the possibility of existence seem very small and also for all the decisions we make throughout our lives. To me it seems that the idea of a multiverse cannot truly exist if all past, present and future beings that occupy anyone of them do not exist in the first place??

P.S. (if I die young say at 5 years old in one and live to be an old man with children in another how does the multiverse playout the outcomes for my future generations or is this the only universe)
 
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Tony Dempsey said:
Hi All
I'm a new comer to this forum, excuse my posting a question in a reply section but I can't find where to post a question.

I just want to put forward a thought I had in relation to the existence of the multiverse idea, here in lies my query: if all my possible outcomes in my life are played out in the multiverse, then how can all possible outcomes for my children's lifes be played out in the multiverse if in one or more of thoes universes I have no children, taking that thought and idea back one generation to my parents and their decisions to have children and the chances that they have any in the first place makes the possibility of existence seem very small and also for all the decisions we make throughout our lives. To me it seems that the idea of a multiverse cannot truly exist if all past, present and future beings that occupy anyone of them do not exist in the first place??

P.S. (if I die young say at 5 years old in one and live to be an old man with children in another how does the multiverse playout the outcomes for my future generations or is this the only universe)

The concept you are missing, perhaps understandably, is that of a world without you in it.
 
I've asked to have this split off into its own thread.

Tony - if you have New Post permissions, there should be a big blue "Post New Thread" button near the upper right of the home page of the particular forum you're in.
 
Tony Dempsey said:
Hi All
if in one or more of thoes universes I have no children, taking that thought and idea back one generation to my parents and their decisions to have children and the chances that they have any in the first place makes the possibility of existence seem very small and also for all the decisions we make throughout our lives.
There would be universes where you were born vs not born. And those universes then proceed and split, e.g. with/without children as appropriate.

What is your level of understanding on QM, in particular maths?

EDIT: re-worded first sentence.
 
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Just for future reference, note that the many-worlds interpretation of QM is not the same thing as the notion of a multiverse. Fortunately, in this thread, it's clear enough that you're talking about many-worlds.
 
Not an expert in QM. AFAIK, Schrödinger's equation is quite different from the classical wave equation. The former is an equation for the dynamics of the state of a (quantum?) system, the latter is an equation for the dynamics of a (classical) degree of freedom. As a matter of fact, Schrödinger's equation is first order in time derivatives, while the classical wave equation is second order. But, AFAIK, Schrödinger's equation is a wave equation; only its interpretation makes it non-classical...
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
Is it possible, and fruitful, to use certain conceptual and technical tools from effective field theory (coarse-graining/integrating-out, power-counting, matching, RG) to think about the relationship between the fundamental (quantum) and the emergent (classical), both to account for the quasi-autonomy of the classical level and to quantify residual quantum corrections? By “emergent,” I mean the following: after integrating out fast/irrelevant quantum degrees of freedom (high-energy modes...

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