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DTSTART:20190331T030000
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DTSTART:20191027T020000
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DTSTAMP:20200804T230554Z
UID:5c5c38a48b777153436874@ist.ac.at
DTSTART:20191008T110000
DTEND:20191008T120000
DESCRIPTION:Speaker: Stefan Filipp\nhosted by Johannes Fink\nAbstract: In r
ecent years quantum technologies have rapidly developed towards first real
izations of quantum computers that promise to outperform conventional comp
uters in certain types of problems. This includes problems in optimization
\, machine learning\, finite element calculations\, but also in the comput
ation of complex molecules. We utilize a fixed-frequency superconducting q
ubit system\, an architecture characterized by its stability\, relatively
long coherence times and scalability. On this platform we use variational
algorithms to compute the ground state of small molecules. Such algorithms
are well suited for near-term applications on non-error corrected quantum
hardware because they only rely on a small number of quantum operations.
To compute the energy spectra of molecular hydrogen we employ parametrical
ly-driven flux-tunable couplers to realize exchange-type interactions that
preserve the number of qubit excitations corresponding to the fixed numbe
r of electrons in the molecule. With this choice we can make best use of t
he available hardware and realize short algorithms that finish within the
coherence time of the system. With gate fidelities around 95% we compute t
he eigenstates within an accuracy of 50 mHartree\, a good starting point f
or near-term applications with scientific and commercial relevance.
LOCATION:Heinzel Seminar Room / Office Bldg West (I21.EG.101)\, IST Austria
ORGANIZER:swiddman@ist.ac.at
SUMMARY:Quantum Seminars: Quantum chemistry calculations on a superconducti
ng qubit quantum processor
URL:https://talks-calendar.app.ist.ac.at/events/1966
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