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dc.contributor.author
Salathé, Yves D.
dc.contributor.supervisor
Wallraff, Andreas
dc.contributor.supervisor
Vion, Denis
dc.date.accessioned
2018-06-08T06:33:40Z
dc.date.available
2018-06-07T19:18:30Z
dc.date.available
2018-06-08T06:33:40Z
dc.date.issued
2018
dc.identifier.uri
http://hdl.handle.net/20.500.11850/268285
dc.identifier.doi
10.3929/ethz-b-000268285
dc.description.abstract
Quantum computers make use of the coherent time evolution of a quantum system to map an input to an output. The coherent quantum dynamics allows the system to take on superpositions of states which is not possible in the laws of classical physics. Once quantum computers are built, they can solve certain problems exponentially faster than a classical computer. However, a quantum computer will most likely not be a stand-alone component but rather needs a host of classical electronics for control and readout of the quantum state. In the present thesis we develop tools for the realization of quantum computing and simulation experiments with superconducting circuits. We develop a real-time digital signal processing unit based on a field programmable gate array (FPGA). A practical quantum computer might require several rounds of measurements where, in each step, a set of quantum bits (qubits) has to be reset into a known state. We demonstrate active reset of a qubit using the FPGA unit on timescales of a few hundred nanoseconds. As a further step, we experimentally demonstrate the usage of the FPGA instrument to realize an active feedforward operation for deterministic quantum teleportation. Quantum teleportation allows to transfer the state of a qubit from one location to the other using a classical communication channel and an entangled pair of qubits as a resource. Quantum teleportation thus might be a useful means for data transfer in future quantum computing and communication systems. One of the most promising applications of a quantum computer is the simulation of quantum mechanical models which are hard to simulate with a classical computer. We perform a proof-of-principle experiment, where we demonstrate the digital quantum simulation of the time evolution under three different kinds of interactions between two spins. In particular, we simulate the XY model, the Heisenberg XYZ model, and the quantum mechanical Ising model with transverse magnetic field. The digital quantum simulation is based on a stroboscopic decomposition of the coherent time evolution into a sequence of up to ten two-qubit gates with variable duration and intertwined with single qubit gates. In future experiments, the ability to digitally simulate spin–spin interactions with superconducting qubits could form a building block for digital quantum simulations of complex systems.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
ETH Zurich
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.title
Toolbox for Quantum Computing and Digital Quantum Simulation with Superconducting Qubits
en_US
dc.type
Doctoral Thesis
dc.rights.license
In Copyright - Non-Commercial Use Permitted
ethz.size
215 p.
en_US
ethz.identifier.diss
24942
en_US
ethz.publication.place
Zurich
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02505 - Laboratorium für Festkörperphysik / Laboratory for Solid State Physics::03720 - Wallraff, Andreas / Wallraff, Andreas
en_US
ethz.date.deposited
2018-06-07T19:18:33Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2018-06-08T06:33:58Z
ethz.rosetta.lastUpdated
2018-11-07T11:32:15Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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