Editing Many-worlds interpretation (section)

=== Symmetries and invariance ===
In 2005, Zurek<ref name="zurek2005">{{cite journal |last1=Zurek |first1=Wojciech H. |author-link=Wojciech H. Zurek |year=2005 |title=Probabilities from entanglement, Born's rule from envariance |journal=Physical Review A |volume=71 |issue=5 |page=052105 |arxiv=quant-ph/0405161 |bibcode=2005PhRvA..71e2105Z |doi=10.1103/physreva.71.052105 |s2cid=18210481}}</ref> produced a derivation of the Born rule based on the symmetries of entangled states; Schlosshauer and Fine argue that Zurek's derivation is not rigorous, as it does not define what probability is and has several unstated assumptions about how it should behave.<ref>{{cite journal |last1=Schlosshauer |first1=M. |last2=Fine |first2=A. |year=2005 |title=On Zurek's derivation of the Born rule |journal=Foundations of Physics |volume=35 |issue=2 |pages=197–213 |arxiv=quant-ph/0312058 |bibcode=2005FoPh...35..197S |doi=10.1007/s10701-004-1941-6 |s2cid=119100306}}</ref>

In 2016, Charles Sebens and [[Sean M. Carroll]], building on work by [[Lev Vaidman]],<ref>Vaidman, L. "Probability in the Many-Worlds Interpretation of Quantum Mechanics". In: Ben-Menahem, Y., & Hemmo, M. (eds), The Probable and the Improbable: Understanding Probability in Physics, Essays in Memory of Itamar Pitowsky. Springer.</ref> proposed a similar approach based on self-locating uncertainty.<ref>{{cite journal |last1=Sebens |first1=Charles T. |last2=Carroll |first2=Sean M. |year=2016 |title=Self-Locating Uncertainty and the Origin of Probability in Everettian Quantum Mechanics |journal=The British Journal for the Philosophy of Science |volume=69 |issue=1 |pages=25–74 |arxiv=1405.7577 |doi=10.1093/bjps/axw004 |s2cid=53648469}}</ref> In this approach, decoherence creates multiple identical copies of observers, who can assign credences to being on different branches using the Born rule. The Sebens–Carroll approach has been criticized by [[Adrian Kent]],<ref>{{Cite journal|last=Kent|first=Adrian|author-link=Adrian Kent|date=February 2015|title=Does it Make Sense to Speak of Self-Locating Uncertainty in the Universal Wave Function? Remarks on Sebens and Carroll|journal=Foundations of Physics|language=en|volume=45|issue=2|pages=211–217 |arxiv=1408.1944|doi=10.1007/s10701-014-9862-5|issn=0015-9018|bibcode=2015FoPh...45..211K|s2cid=118471198}}</ref> and Vaidman does not find it satisfactory.<ref>{{Cite book|last1=Vaidman|first1=Lev|chapter=Derivations of the Born Rule|title=Quantum, Probability, Logic: Itamar Pitowsky's Work and Influence |editor=Meir Hemmo |editor2=Orly Shenker |publisher=Springer Nature Switzerland |year=2020|id=PhilSci: [http://philsci-archive.pitt.edu/15943 15943]}}</ref>