The formal colloquium of the Institute of Physics, Polish Academy of
Sciences it the main ongoing periodic series of lectures in physics and
related science, of interest to members of the Institute. It is held from
1977. Colloquium speakers are primarily domestic and foreign scholars of
established reputation, but also less-known physicists with remarkable and
current scientific achievements. The colloquium is held once a month from
September to June, usually at 3:15 PM on the last Tuesday of the month in
the Auditorium of the Institute of Physics. Colloquia are open to the
public, and are preceded by a coffee/the reception at the Institute.
For future information about the colloquia, pleace contact Prof. Dr. hab. Leszek Sirko
(firstname.lastname@example.org), current chairman of the colloquium committee.
NOTICE OF NEXT COLLOQUIUM
We are pleased to announce that on June 25th 2019 (Tuesday)
at 15:15 in the Institute of Physics, in the L. Sosnowski's auditorium
will be held colloquium of the Institute of Physics PAS, in which:
Prof. Dr. hab. Marek Żukowski
from International Centre for Theory of Quantum Technologies (ICTQT), University of Gdańsk,
will give a lecture entitled:
Entanglement indicators for quantum optical fields
We cordially invite to attend the colloquium and please to inform other interested persons.
Before the colloquium, at 14:45, participants are welcome for coffee, tea and biscuits.
We show that any multi-qudit entanglement witness leads to a
non-separability indicator for quantum optical fields, which involves
intensity correlation measurements and is useful for field states of
undefined photon numbers. With the approach we get, e.g., necessary and
sufficient conditions for intensity or intensity-rates correlations to
reveal polarization entanglement. We also derive separability conditions
for experiments with mutually unbiased multiport interferometers. Within
the standard detector inefficiency model these entanglement indicators
work for any detection efficiencies. For specific cases, we show
advantages of using local intensity rates rather than intensities. The
approach with rates allows a mapping of Bell inequalities for qudits to
ones for optical fields. Our results may find applications also in
studies of non-classicality of correlations in "macroscopic" many-body
quantum systems of undefined or uncontrollable number of constituents.