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[Fizinfo] Relativitaselmeleti szeminarium

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  • From: "Szabados,L." <lbszab AT>
  • To: fizinfo AT
  • Subject: [Fizinfo] Relativitaselmeleti szeminarium
  • Date: Tue, 22 Apr 2014 22:45:05 +0200 (CEST)


Eloado: Dr. Martin Scholtz
Karoly Egyetem, Praga

Az eloadas cime: The Bondi mass of Einstein-Maxwell-Klein-Gordon

t: 2014 aprilis 28 (hetfo), 14.00
(x,y,z): KFKI RMKI III. epulet, tanacsterem

The concept of quasi-local energy-momentum and angular momentum belongs to the most challenging problems in general relativity. Many useful suggestions how to define quasi-local quantities are based on the so-called Nester-Witten form and we briefly review some of them. In particular, we start with the motivation behind the Penrose quasi-local mass which naturally leads to the twistor equation. As a slight digression, we discuss the notion of the twistor in some detail and present its geometrical and physical interpretation. After discussing the drawbacks of the Penrose mass, we present some other approaches and relate them to the surface integral of the Nester-Witten form. Finally we apply this formalism to calculate the Bondi mass of asymptotically flat spacetimes with interacting electromagnetic and scalar field sources and discuss the positivity of the Bondi mass and the properties of corresponding massloss formula.

  • [Fizinfo] Relativitaselmeleti szeminarium, Szabados,L., 04/22/2014

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