Matches in SemOpenAlex for { <https://semopenalex.org/work/W4313432537> ?p ?o ?g. }
- W4313432537 abstract "A bstract The validity of the Coleman mechanism, which automatically tunes the fundamental constants, is examined in two-dimensional and four-dimensional quantum gravity theories. First, we consider two-dimensional Euclidean quantum gravity on orientable closed manifolds coupled to conformal matter of central charge c ≤ 1. The proper time Hamiltonian of this system is known to be written as a field theory of noncritical strings, which can also be viewed as a third quantization in two dimensions. By directly counting the number of random surfaces with various topologies, we find that the contribution of the baby universes is too small to realize the Coleman mechanism. Next, we consider four-dimensional Lorentzian gravity. Based on the difference between the creation of the mother universe from nothing and the annihilation of the mother universe into nothing, we introduce a non-Hermitian effective Hamiltonian for the multiverse. We show that Coleman’s idea is satisfied in this model and that the cosmological constant is tuned to be nearly zero. Potential implications for phenomenology are also discussed." @default.
- W4313432537 created "2023-01-06" @default.
- W4313432537 creator A5049750407 @default.
- W4313432537 creator A5070622339 @default.
- W4313432537 creator A5077722703 @default.
- W4313432537 date "2022-12-19" @default.
- W4313432537 modified "2023-09-27" @default.
- W4313432537 title "Baby universes in 2d and 4d theories of quantum gravity" @default.
- W4313432537 cites W1965736954 @default.
- W4313432537 cites W1966010547 @default.
- W4313432537 cites W1967876124 @default.
- W4313432537 cites W1969183248 @default.
- W4313432537 cites W1971976786 @default.
- W4313432537 cites W1980050019 @default.
- W4313432537 cites W1982705689 @default.
- W4313432537 cites W1985530513 @default.
- W4313432537 cites W1985645295 @default.
- W4313432537 cites W1987143739 @default.
- W4313432537 cites W1993079947 @default.
- W4313432537 cites W1993471996 @default.
- W4313432537 cites W2002432354 @default.
- W4313432537 cites W2004790699 @default.
- W4313432537 cites W2006636122 @default.
- W4313432537 cites W2015469945 @default.
- W4313432537 cites W2047536318 @default.
- W4313432537 cites W2050565627 @default.
- W4313432537 cites W2050882185 @default.
- W4313432537 cites W2051355010 @default.
- W4313432537 cites W2056598883 @default.
- W4313432537 cites W2058584612 @default.
- W4313432537 cites W2062366411 @default.
- W4313432537 cites W2062508306 @default.
- W4313432537 cites W2067604926 @default.
- W4313432537 cites W2068932216 @default.
- W4313432537 cites W2071982798 @default.
- W4313432537 cites W2074615154 @default.
- W4313432537 cites W2075986829 @default.
- W4313432537 cites W2085495509 @default.
- W4313432537 cites W2088680200 @default.
- W4313432537 cites W2090164679 @default.
- W4313432537 cites W2092581607 @default.
- W4313432537 cites W2094639869 @default.
- W4313432537 cites W2105468666 @default.
- W4313432537 cites W2113332448 @default.
- W4313432537 cites W2114862445 @default.
- W4313432537 cites W2119193621 @default.
- W4313432537 cites W2131059213 @default.
- W4313432537 cites W2138554348 @default.
- W4313432537 cites W2140790827 @default.
- W4313432537 cites W2157006349 @default.
- W4313432537 cites W2168466083 @default.
- W4313432537 cites W2175998061 @default.
- W4313432537 cites W2338712783 @default.
- W4313432537 cites W2811024116 @default.
- W4313432537 cites W2945121003 @default.
- W4313432537 cites W2991362355 @default.
- W4313432537 cites W3021781098 @default.
- W4313432537 cites W3034487792 @default.
- W4313432537 cites W3098278464 @default.
- W4313432537 cites W3098504149 @default.
- W4313432537 cites W3099163181 @default.
- W4313432537 cites W3100467335 @default.
- W4313432537 cites W3101295773 @default.
- W4313432537 cites W3101297073 @default.
- W4313432537 cites W3102674080 @default.
- W4313432537 cites W3103614258 @default.
- W4313432537 cites W3104493810 @default.
- W4313432537 cites W3120272251 @default.
- W4313432537 cites W3120838392 @default.
- W4313432537 cites W3201636113 @default.
- W4313432537 cites W3201925373 @default.
- W4313432537 cites W3205329097 @default.
- W4313432537 cites W3210517716 @default.
- W4313432537 cites W4206311832 @default.
- W4313432537 cites W4221031282 @default.
- W4313432537 doi "https://doi.org/10.1007/jhep12(2022)100" @default.
- W4313432537 hasPublicationYear "2022" @default.
- W4313432537 type Work @default.
- W4313432537 citedByCount "0" @default.
- W4313432537 crossrefType "journal-article" @default.
- W4313432537 hasAuthorship W4313432537A5049750407 @default.
- W4313432537 hasAuthorship W4313432537A5070622339 @default.
- W4313432537 hasAuthorship W4313432537A5077722703 @default.
- W4313432537 hasBestOaLocation W43134325371 @default.
- W4313432537 hasConcept C108568745 @default.
- W4313432537 hasConcept C111472728 @default.
- W4313432537 hasConcept C115047598 @default.
- W4313432537 hasConcept C121332964 @default.
- W4313432537 hasConcept C126255220 @default.
- W4313432537 hasConcept C129782007 @default.
- W4313432537 hasConcept C130787639 @default.
- W4313432537 hasConcept C136815107 @default.
- W4313432537 hasConcept C138885662 @default.
- W4313432537 hasConcept C166861157 @default.
- W4313432537 hasConcept C2524010 @default.
- W4313432537 hasConcept C2777345500 @default.
- W4313432537 hasConcept C28855332 @default.
- W4313432537 hasConcept C31972630 @default.
- W4313432537 hasConcept C33332235 @default.
- W4313432537 hasConcept C33923547 @default.