[institut] Kolokvijum Instituta za fiziku: Nemanja Kaloper, petak, 12. jun, 13:00

[Antun Balaz]

Поштоване колегинице и колеге,

Са задовољством вас позивам на

КОЛОКВИЈУМ ИНСТИТУТА ЗА ФИЗИКУ

који ће бити одржан у петак, 12. јуна 2015. године са почетком у 13 часова у сали “Звонко Марић” Института за физику у Београду. Предавање под називом:

COSMOLOGICAL CONSTANT AND THE END OF THE UNIVERSE

одржаће проф. др Немања Калопер (Department of Physics, University of California - UC Davis). Апстракт предавања:

Curiously, one can state the cosmological constant's implications for modern physics by a wordplay on the title of the famous Gauguin painting on exhibit in the Museum of Fine Arts in Boston: "Where does the Universe come from? What is the Universe? Where is the Universe going?". These questions appear to be distinct and independent queries about the past, present and future of the universe. Yet,our attempts to answer them all share a crucial common ingredient: vacuum energy, or cosmological constant. Indeed, vacuum energy plays key role in driving inflation, in dominating the present universe, and if it is here to stay forever, in fully controlling the cosmic future. Yet we still do not comprehend vacuum energy dynamics, and we continue to stumble searching for a mechanism to control its scale. In this talk I will discuss the problems, and go over a recent proposal how to sequester vacuum energy by a very minimal modification of gravitational dynamics. The implications of the mechanism are rather surprising: if it is the way how nature works, then the universe must end: it must collapse some time in the future, the current dark energy which dominates is just a transient, and its spatial geometry is not flat, but instead a three dimensional sphere. Therefore the cosmic future may be inextricably linked to its beginnings by this 'cosmic symmetry'.

Срдачан поздрав,
Антун Балаж

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Antun Balaz
E-mail: antun at ipb.ac.rs
Web: http://www.scl.rs/antun

Phone: +381 11 3713152
Fax: +381 11 3162190

Scientific Computing Laboratory
Institute of Physics Belgrade
Pregrevica 118, 11080 Belgrade, Serbia
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