ITAMP Topical Lunch Discussion
Speaker: Sebastian Hofer (University of
Vienna, group M. Aspelmeyer)
Title:
Optomechanical Entanglement as a Resource for Quantum Control
and Information Protocols
Abstract: The
opto- and electro-mechanical light--matter interaction
provides the means to create entanglement between a mechanical
oscillator and an electromagnetic field. In this talk I will
discuss several quantum information and control protocols
making use of this type of entanglement as their main
resource.
First, I will describe a Bell test using the
Einstein--Podolski--Rosen entangled state recently generated
by Palomaki et al., which would rule out any local and
realistic explanation of the measured data without assuming
the validity of quantum mechanics at macroscopic scales.
Although challenging, the parameter regime required for our
scheme has been demonstrated or is within reach of current
experiments.
In the second part, I will show how we can utilize
entanglement within the framework of time-continuous quantum
control in order to engineer the quantum state of a mechanical
system. Specifically, I will analyze the creation of bipartite
mechanical entanglement via time-continuous entanglement
swapping, and preparation of a squeezed mechanical state by
time-continuous teleportation. Finally I will show an
experimental demonstration of optomechanical state estimation
by Kalman filtering as a first step towards the implementation
of the analyzed protocols.
Date: Thursday,
April 7th
Time: 12:00-1:30 pm
Pizza will be served.
Location: B-106 @ Center for Astrophysics (60 Garden
Street)
Directions: after entering the lobby of the CfA, turn right to
enter the hallway of the B building. In the hallway, turn
right again, and B-106 is there.
--
Dr. Igor Pikovski
Institute for Theoretical Atomic, Molecular and Optical Physics (ITAMP)
Harvard-Smithsonian Center for Astrophysics
60 Garden St, MS-14; Cambridge, MA 02138, USA
Tel.: +1 (617) 496-7613
e-mail: igor.pikovski@cfa.harvard.edu
www.cfa.harvard.edu/~igor.pikovski/