Suppose there are two independent experiments taking place [itex] \left\vert \Phi\right\rangle =\alpha _{1}\left\vert \phi _{1}\right\rangle +\beta_{1}\left\vert \phi _{2}\right\rangle [/itex] and [itex]\left\vert \Psi \right\rangle=\alpha _{2}\left\vert \psi _{1}\right\rangle +\beta _{2}\left\vert \psi_{2}\right\rangle [/itex]. According to MWI, when [itex]\left\vert \Phi \right\rangle [/itex] is measured, there are two "branches" of the world, one for each [itex]\left\vert\phi _{i}\right\rangle [/itex]. Similarly, for [itex]\left\vert \Psi \right\rangle[/itex]. My question is, what happens when a measurement for each [itex]\left\vert \Phi\right\rangle [/itex] and [itex]\left\vert \Psi \right\rangle [/itex] takes place simultaneously? As I see it, there are two worlds, one for each [itex]\left\vert \Phi \right\rangle [/itex] but for these worlds but in these worlds, what happens to [itex]\left\vert \Psi \right\rangle[/itex]? Is it that, in these two worlds, [itex]\left\vert \Psi \right\rangle [/itex] has not taken place?(adsbygoogle = window.adsbygoogle || []).push({});

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# I MWI for simultaneous events

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