BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:A 'perpetuum motion of third type' in theories violating the weak 
 energy condition - Pavel Ivanov\, P.N. Lebedev Physical Institute
DTSTART:20110218T130000Z
DTEND:20110218T140000Z
UID:TALK28600@talks.cam.ac.uk
CONTACT:David Kubiznak
DESCRIPTION:The one-dimensional dynamics of a classical ideal ‘exotic’
  fluid with equation of state p=p(ϵ) negative violating the weak energy c
 ondition is discussed. Under certain assumptions it is shown that the well
 -known Hwa-Bjorken exact solution of one-dimensional relativistic hydrodyn
 amics is confined within the future/past light cone and that the total ene
 rgy of such a solution is equal to zero and that there are regions within 
 the light cone with negative (n) and positive (p) total energies. For cert
 ain equations of state there is a continuous energy transfer from the (n)-
 regions to the (p)-regions resulting in indefinite growth of energy in the
  (p)-regions with time\, which may be interpreted\nas action of a specific
  ‘Perpetuum Motion’. It is conjectured that theories plagued by soluti
 ons of similar type should be discarded as inherently unstable
LOCATION:Pavilion B Potter Room (B1.19)
END:VEVENT
END:VCALENDAR