Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Riwar, Roman P."'
Autor:
Kruti, Daniel, Riwar, Roman-Pascal
Superconducting junctions are essential building blocks for quantum hardware, and their fundamental behavior remains a highly active research field. The behaviour of generic junctions is conveniently described by Beenakker's determinant formula, link
Externí odkaz:
http://arxiv.org/abs/2408.07035
Autor:
Herrig, Tobias, Koliofoti, Christina, Pixley, Jedediah H., König, Elio J., Riwar, Roman-Pascal
Topological bandstructures interfering with moir\'e superstructures give rise to a plethora of emergent phenomena, which are pivotal for correlated insulating and superconducting states of twisttronics materials. While quasiperiodicity was up to now
Externí odkaz:
http://arxiv.org/abs/2310.15103
Publikováno v:
Phys. Rev. B 109, 245423 (2024)
The control of any type of quantum hardware invariably necessitates time-dependent driving. If the basis depends on the control parameter, the presence of a time-dependent control field yields an extra term in the Schr\"odinger equation that is often
Externí odkaz:
http://arxiv.org/abs/2306.09440
Publikováno v:
Phys. Rev. B 108, 235133 (2023)
The calculation of the full counting statistics of the charge within a finite interval of an interacting one-dimensional system of electrons is a fundamental, yet as of now unresolved problem. Even in the non-interacting case, charge counting turns o
Externí odkaz:
http://arxiv.org/abs/2305.15906
Publikováno v:
npj Quantum Inf. 9, 116 (2023)
Superconducting circuits are an extremely versatile platform to realize quantum information hardware and to emulate topological materials. We here show how a simple arrangement of capacitors and conventional superconductor-insulator-superconductor ju
Externí odkaz:
http://arxiv.org/abs/2212.12382
Quantum circuit theory is a powerful and ever-evolving tool to predict the dynamics of superconducting circuits. In its language, quantum phase slips (QPSs) are famously considered to be the exact dual to the Josephson effect. However, this duality r
Externí odkaz:
http://arxiv.org/abs/2204.13633
Fractional Josephson effect versus fractional charge in superconducting-normal metal hybrid circuits
Fractionally charged excitations play a central role in condensed matter physics, and can be probed in different ways. If transport occurs via dissipation-less supercurrents, they manifest as a fractional Josephson effect, whereas in dissipative tran
Externí odkaz:
http://arxiv.org/abs/2204.13623
Publikováno v:
Phys. Rev. B 106, 035430 (2022)
Time-dependent control of superconducting quantum circuits is a prerequisite for building scalable quantum hardware. The quantum description of these circuits is complicated due to the electromotive force (emf) induced by time-varying magnetic fields
Externí odkaz:
http://arxiv.org/abs/2204.05087
Quantum circuit theory has become a powerful and indispensable tool to predict the dynamics of superconducting circuits. Surprisingly however, the question of how to properly account for a time-dependent driving via external magnetic fields has hardl
Externí odkaz:
http://arxiv.org/abs/2103.03577
Autor:
Riwar, Roman-Pascal
Publikováno v:
SciPost Phys. 10, 093 (2021)
Charge quantization, or the absence thereof, is a central theme in quantum circuit theory, with dramatic consequences for the predicted circuit dynamics. Very recently, the question of whether or not charge should actually be described as quantized h
Externí odkaz:
http://arxiv.org/abs/2012.13012