BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//talks.cam.ac.uk//v3//EN
BEGIN:VTIMEZONE
TZID:Europe/London
BEGIN:DAYLIGHT
TZOFFSETFROM:+0000
TZOFFSETTO:+0100
TZNAME:BST
DTSTART:19700329T010000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0100
TZOFFSETTO:+0000
TZNAME:GMT
DTSTART:19701025T020000
RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
CATEGORIES:Wednesday HEP-GR Colloquium
SUMMARY:Stochastic and non-unitary Quantum Chemistry - Ali
Alavi\, Department of Chemistry\, Cambridge
DTSTART;TZID=Europe/London:20191113T141500
DTEND;TZID=Europe/London:20191113T151500
UID:TALK132583AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/132583
DESCRIPTION:One of the major problems of quantum chemistry is
how to approximate\naccurately (ground or excited-
state) solutions to the many-electron\nSchrödinger
equation\, as appropriate for molecules. The diff
iculty \narises from the combinatorially large Hil
bert spaces which must be accounted for in describ
ing correlated wavefunctions\, and the fact that t
he wavefunctions of interest are Fermionic in natu
re. We will outline our work in this area\, namely
a stochastic methodology to sample such Fermionic
spaces (which means tackling the Fermion sign pro
blem)\, as well as non-unitary transformations of
the Schrödinger Hamiltonian which compactify the r
esulting solution\, enabling very high accuracy so
lutions to be obtained in relatively small basis s
ets.\n
LOCATION:MR2\, Centre for Mathematical Sciences
CONTACT:Francesca Chadha-Day
END:VEVENT
END:VCALENDAR