Dear Group
We will meet in the CTP seminar room today at 1:00 and have the
following presentation by Masoud Mohseni.
Eddie
Title: Direct Characterization of Quantum Dynamics
Abstract:
The characterization of quantum dynamics is a fundamental and central
task in quantum mechanics. This task is typically addressed by
quantum process tomography (QPT). Here we present an alternative
"direct characterization of quantum dynamics" (DCQD) algorithm. In
contrast to all known QPT methods, this algorithm relies on error-
detection techniques and does not require any quantum state
tomography. We illustrate that, by construction, the DCQD algorithm
can be applied to the task of obtaining partial information about
quantum dynamics. Specifically, we demonstrate how DCQD can be
utilized for Hamiltonian identification tasks. Furthermore, we argue
that the DCQD algorithm is experimentally implementable in a variety
of prominent quantum-information processing systems, and show how it
can be realized in photonic systems with present day technology.
References:
M. Mohseni and D. A. Lidar, Phys, Rev. Lett. 97, 170501 (2006).
M. Mohseni and D. A. Lidar, quant-ph/0601034.
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Edward Farhi
Professor of Physics
Director
Center for Theoretical Physics
Massachusetts Institute of Technology
NE25 Room 4024
Cambridge MA 02139
617 253 4871
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