Multiverse

String theory
Fundamental objects
String Cosmic string Brane D-brane
Perturbative theory
Bosonic S-duality T-duality U-duality M-theory F-theory AdS/CFT correspondence
Phenomenology
Phenomenology Cosmology Landscape
Mathematics
Geometric Langlands correspondence Mirror symmetry Monstrous moonshine Vertex algebra
Related concepts Theory of everything Conformal field theory Quantum gravity Supersymmetry Supergravity Twistor string theory N = 4 supersymmetric Yang–Mills theory Kaluza–Klein theory Multiverse Holographic principle
Theorists Aganagić Arkani-Hamed Atiyah Banks Berenstein Bousso Curtright Dijkgraaf Distler Douglas Duff Dvali Ferrara Fischler Friedan Gates Gliozzi Gopakumar Green Greene Gross Gubser Gukov Guth Hanson Harvey Hořava Horowitz Gibbons Kachru Kaku Kallosh Kaluza Kapustin Klebanov Knizhnik Kontsevich Klein Linde Maldacena Mandelstam Marolf Martinec Minwalla Moore Motl Mukhi Myers Nanopoulos Năstase Nekrasov Neveu Nielsen van Nieuwenhuizen Novikov Olive Ooguri Ovrut Polchinski Polyakov Rajaraman Ramond Randall Randjbar-Daemi Roček Rohm Sagnotti Scherk Schwarz Seiberg Sen Shenker Siegel Silverstein Sơn Staudacher Steinhardt Strominger Sundrum Susskind 't Hooft Townsend Trivedi Turok Vafa Veneziano Verlinde Verlinde Wess Witten Yau Yoneya Zamolodchikov Zamolodchikov Zaslow Zumino Zwiebach
History Glossary

"Megaverse" redirects here. For other uses, see Megaverse (disambiguation).

A multiverse is the theory of a conjectured set of multiple possible universes, including ours, which make up reality. These universes are sometimes called parallel universes. A number of different versions have been considered.

The word "multiverse" was created in 1895 by psychologist William James as a philosophical concept.

The cosmological multiverse

The cosmological multiverse tries to explain why the universe we can see sometimes called ''our universe'' is one that life can exist in. Even small changes to the way physics works would make life impossible. In a multiverse a large number of universes are randomly created and some happen to favour life emerging there. Many inhospitable universes would also have been created, but there would be no life there to observe their existence.

The quantum multiverse

The quantum multiverse is another version in which our universe splits into alternative futures with every quantum event. This is called Many-worlds interpretation of quantum mechanics.

Multiverse Media

• 

  Schrödinger's cat in the many-worlds interpretation, where a branching of the universe occurs through a superposition of two quantum mechanical states

• Animation showing the multiple brane universes in the bulk

• 

  Cosmos animation of a cyclic universe

• 

  Concept of a twin universe, with the beginning (of time) in the middle

Related pages

• Quantum immortality

Further reading

• "Astrophysicists lock horns over weather the multiverse exists". Mind Matters News. 27 February 2022.
• "Multiverse theories are bad for science". John Horgan. Scientific American.
• "Everything Everywhere All at Once, explained by a quantum physicist". Alex Abad-Sentos. Vox. 15 April 2022.
• "Is the Big Bang Theory's Sheldon Right Re: The Multiverse. Sheldon Cooper insists that in no universe would he dance with Penny". Robert J. Marks. Mind Matters News. 4 June 2020.
• "Why This Universe? A New Calculation Suggests Our Cosmos Is Typical". QuantaMagazine.