When: Friday May 6 from 11:30 AM to 12:30 PM
Where: Cabot Division Room at Mallinckrodt
What: Joel (me) is presenting:
"*Nonlinear spectroscopy for excitons: Where is the density matrix?*
*Coherence and decoherence, entanglement, Markovianity, and
non-Markovianity, population and coherence transfers... All of these terms
pervade the literature on Quantum Biology, and are explicitly related to the
density matrix of the excitonic system under consideration. However, no
experimental method to explicitly probe such density matrix has been
proposed before. *
*
*
*In our work, we choose a tractable model system: a coupled dimer, and ask
the following questions: What set of nonlinear optical measurements need to
be carried out in order to map out the time-evolving excitonic density
matrix? Can a Quantum Process Tomography (QPT) be performed on an excitonic
system? How is QPT related to the fancy 2D electronic spectra advocated by
the leading experimental groups? I'll try to argue that these
experiments (emperor's new clothes?) are too complicated for what we want,
and that simpler experiments will hint us more directly about excitonic
dynamics.*"
--
Joel Yuen-Zhou
PhD candidate in Chemical Physics
Harvard University CCB,
12 Oxford St. Mailbox 107,
Cambridge, MA, USA.
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