When: Friday May 6 from 11:30 AM to 12:30 PM<div>Where: Cabot Division Room at Mallinckrodt</div><div>What: Joel (me) is presenting:</div><div><br></div><div>&quot;<b><i>Nonlinear spectroscopy for excitons: Where is the density matrix?</i></b></div>
<div><br></div><div><i>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. </i></div>
<div><i><br></i></div><div><i>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&#39;ll try to argue that these experiments (emperor&#39;s new clothes?) are too complicated for what we want, and that simpler experiments will hint us more directly about excitonic dynamics.</i>&quot;</div>
<div><br></div><div><br>-- <br><span style="font-family:arial, sans-serif;font-size:13px;border-collapse:collapse;color:rgb(136, 136, 136)"><div>Joel Yuen-Zhou</div><div>PhD candidate in Chemical Physics</div><div>Harvard University CCB,</div>
<div>12 Oxford St. Mailbox 107, </div><div>Cambridge, MA, USA.</div></span><br>
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