---
res:
bibo_abstract:
- "Recent substantial advances in the feld of superconducting circuits have shown
its\r\npotential as a leading platform for future quantum computing. In contrast
to classical\r\ncomputers based on bits that are represented by a single binary
value, 0 or 1, quantum\r\nbits (or qubits) can be in a superposition of both.
Thus, quantum computers can store\r\nand handle more information at the same time
and a quantum advantage has already\r\nbeen demonstrated for two types of computational
tasks. Rapid progress in academic\r\nand industry labs accelerates the development
of superconducting processors which may\r\nsoon fnd applications in complex computations,
chemical simulations, cryptography, and\r\noptimization. Now that these machines
are scaled up to tackle such problems the questions\r\nof qubit interconnects
and networks becomes very relevant. How to route signals on-chip\r\nbetween diferent
processor components? What is the most efcient way to entangle\r\nqubits? And
how to then send and process entangled signals between distant cryostats\r\nhosting
superconducting processors?\r\nIn this thesis, we are looking for solutions to
these problems by studying the collective\r\nbehavior of superconducting qubit
ensembles. We frst demonstrate on-demand tunable\r\ndirectional scattering of
microwave photons from a pair of qubits in a waveguide. Such a\r\ndevice can route
microwave photons on-chip with a high diode efciency. Then we focus\r\non studying
ultra-strong coupling regimes between light (microwave photons) and matter\r\n(superconducting
qubits), a regime that could be promising for extremely fast multi-qubit\r\nentanglement
generation. Finally, we show coherent pulse storage and periodic revivals\r\nin
a fve qubit ensemble strongly coupled to a resonator. Such a reconfgurable storage\r\ndevice
could be used as part of a quantum repeater that is needed for longer-distance\r\nquantum
communication.\r\nThe achieved high degree of control over multi-qubit ensembles
highlights not only the\r\nbeautiful physics of circuit quantum electrodynamics,
it also represents the frst step\r\ntoward new quantum simulation and communication
methods, and certain techniques\r\nmay also fnd applications in future superconducting
quantum computing hardware.\r\n@eng"
bibo_authorlist:
- foaf_Person:
foaf_givenName: Elena
foaf_name: Redchenko, Elena
foaf_surname: Redchenko
foaf_workInfoHomepage: http://www.librecat.org/personId=2C21D6E8-F248-11E8-B48F-1D18A9856A87
bibo_doi: 10.15479/at:ista:12132
dct_date: 2022^xs_gYear
dct_isPartOf:
- http://id.crossref.org/issn/2663-337X
- http://id.crossref.org/issn/978-3-99078-024-4
dct_language: eng
dct_publisher: Institute of Science and Technology Austria@
dct_title: Controllable states of superconducting Qubit ensembles@
...