10:23 a.m.
Dear friends,
This Wednesday, May 7th at 11:30-12:30 in D1.14, we're happy to welcome back Matteo
D'Anna to give another talk, this time about simulation of 2D systems. Title and
abstract below. Join us in person or online at https://meet.jit.si/CQISeminarTalks
Warm regards,
Will
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Title: Circuit compression for 2D quantum dynamics
Abstract: Deterministic methods for implementing the dynamics of quantum systems with
quantum computers often suffer between a tradeoff between depth and accuracy. Variational
approaches aim at offering accurate implementations at lower depths, at the expenses of
needing to perform an optimization of the parametrized ansatz beforehand. In this I will
present a novel method, taking advantage of out-of-distribution results to perform the
optimization by employing only product states. By usisng a Pauli-propagation algorithm the
method is able to estimate the target cost function for systems of, in principle,
arbitrary topology, including 2D systems. The method allows to obtain implementations of
the dynamics of large 2D systems (up to square lattices with 30 x 30 sites) that is
orders of magnitude more accurate than standard trotterization, at identical depth. It is
even possible to run the compiled ansatz on the H1 quantum chip and find that it can
follow the dynamics with high accuracy. The method shows that compilation for large 2D
systems is possible, and opens up the exploration to a plethora of applications both in
theory and applications, as many families of ansaetze and connectivities can now be
studied.