ELFT HÍRADÓ

[Janos Asboth <asboth.janos AT ttk.bme.hu>]

Meghívó

BME Elméleti Fizika Szeminárium,

ápr. 26. péntek 10h15,

1111 Budapest, Budafoki út 8., BME F III. magasföldszint 01.,
Elméleti Fizika Tanszék szemináriumi szoba

Lévay Péter  (BME Elméleti Fizika Tanszék)
Emergent spacetime and segmented strings. Entanglement is not enough?

Thanks to the classical work of Bekenstein and Hawking we have learnt that
gravity is holographic. This means that the quantum degrees of freedom of
gravity are connected to surfaces, and not to volumes enclosed by such
surfaces. Based on this idea the term Holographic Principle has been
coined. The first mathematically precise implementation of this principle
was inside string theory. This is the famous AdS/CFT correspondence. Later
the idea of holography separated from string theory. This was due to the
striking results of quantum information theory which is  is based on the
phenomenon of entanglement regarded as a new resource. Soon entanglement
based articulation of  ideas provided new insight on considerations of the
nature of gravity. The first step was the combination of the idea of
holography with the idea of entanglement. In this context it was realized
that even classical spacetime geometry is an emergent concept, inherently
of quantum origin.

In this talk in the simplest holographic scenario we put strings back into
the mix [1].
We show that the world sheets of classical strings regarded as objects
testing classical spacetime geometry encode quantum information geometric
data. Data which is not necessarily directly related to entanglement.

[1]: Bercel Boldis and Péter Lévay: "Segmented strings and holography",
Phys. Rev. D 109, 046002 – Published 5 February 2024

Minden érdeklődőt szeretettel várunk.
Asbóth János,
 szemináriumi koordinátor