Zobrazeno 1 - 10
of 142
pro vyhledávání: '"Sigurdsson, Helgi"'
Autor:
Gnusov, Ivan, Harrison, Stella, Alyatkin, Sergey, Sitnik, Kirill, Sigurdsson, Helgi, Lagoudakis, Pavlos G.
The response of superfluids to the external rotation, evidenced by emergence of quantised vortices, distinguishes them from conventional fluids. In this work, we demonstrate that the number of vortices in a stirred polariton condensate depends on the
Externí odkaz:
http://arxiv.org/abs/2308.09373
Autor:
Gianfrate, Antonio, Sigurdsson, Helgi, Ardizzone, Vincenzo, Nguyen, Hai Chau, Riminucci, Fabrizio, Efthymiou-Tsironi, Maria, Baldwin, Kirk W., Pfeiffer, Loren N., Trypogeorgos, Dimitrios, De Giorgi, Milena, Ballarini, Dario, Nguyen, Hai Son, Sanvitto, Daniele
Publikováno v:
Nat. Phys. 20, 61-67 (2024)
Topological bound states in the continuum are confined wave-mechanical objects that offer advantageous ways to enhance light-matter interactions in compact photonic devices. In particular, their large quality factor in the strong-coupling regime has
Externí odkaz:
http://arxiv.org/abs/2301.08477
We report on experimental observation of next-nearest-neighbour coupling between ballistically expanding spinor exciton-polariton condensates in a planar semiconductor microcavity. All-optical control over the coupling strength between neighbouring c
Externí odkaz:
http://arxiv.org/abs/2301.04210
Autor:
Gnusov, Ivan, Harrison, Stella, Alyatkin, Sergey, Sitnik, Kirill, Topfer, Julian, Sigurdsson, Helgi, Lagoudakis, Pavlos G.
Publikováno v:
SCIENCE ADVANCES 25 Jan 2023 Vol 9, Issue 4
The appearance of quantised vortices in the classical ``rotating bucket'' experiments of liquid helium and ultracold dilute gases provides the means for fundamental and comparative studies of different superfluids. Here, we realize the ``rotating buc
Externí odkaz:
http://arxiv.org/abs/2208.14065
We propose a method to enhance the spatial coupling between ballistic exciton-polariton condensates in a semiconductor microcavity based on available spatial light modulator technologies. Our method, verified by numerically solving a generalized Gros
Externí odkaz:
http://arxiv.org/abs/2208.13596
We study the modification of the spatial coupling parameter between interacting ballistic exciton-polariton condensates in the presence of photonic spin orbit coupling appearing from TE-TM splitting in planar semiconductor microcavities. We propose a
Externí odkaz:
http://arxiv.org/abs/2112.13601
Autor:
Sitnik, Kirill A., Alyatkin, Sergey, Töpfer, Julian D., Gnusov, Ivan, Cookson, Tamsin, Sigurdsson, Helgi, Lagoudakis, Pavlos G.
We demonstrate spontaneous formation of a nonlinear vortex cluster state in a microcavity exciton-polariton condensate with time-periodic sign flipping of its topological charges at the GHz scale. When optically pumped with a ring-shaped nonresonant
Externí odkaz:
http://arxiv.org/abs/2110.15399
We theoretically implement a strategy from quantum computation architectures to simulate Stuart-Landau oscillator dynamics in all-to-all connected networks, also referred to as complete graphs. The technique builds upon the triad structure minor embe
Externí odkaz:
http://arxiv.org/abs/2109.10142
Autor:
Król, Mateusz, Rechcińska, Katarzyna, Sigurdsson, Helgi, Oliwa, Przemysław, Mazur, Rafał, Morawiak, Przemysław, Piecek, Wiktor, Kula, Przemysław, Lagoudakis, Pavlos, Matuszewski, Michał, Bardyszewski, Witold, Piętka, Barbara, Szczytko, Jacek
Publikováno v:
Phys. Rev. Lett. 127, 190401 (2021)
Spin-orbit interactions which couple spin of a particle with its momentum degrees of freedom lie at the center of spintronic applications. Of special interest in semiconductor physics are Rashba and Dresselhaus spin-orbit coupling (SOC). When equal i
Externí odkaz:
http://arxiv.org/abs/2104.09674
Autor:
Vygovska, Maria, Hoyt, David, Snyder, Ashley M., Jonmundsson, Thorarinn, Khouri, Ashley, Sahni, Dev, Ungar, Jonathan, Lewin, Jesse M., Gulati, Nicholas, Phelps, Robert G., Sahni, Vikram N., Grant-Kels, Jane M., Sigurdsson, Helgi, Jonasson, Jon Gunnlaugur, Adalsteinsson, Jonas A.
Publikováno v:
In JAAD International June 2024