Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Colas, David"'
Anderson localization is a universal interference phenomenon occurring when a wave evolves through a random medium and it has been observed in a great variety of physical systems, either quantum or classical. The recently developed localization lands
Externí odkaz:
http://arxiv.org/abs/2204.11632
Autor:
Rahmani, Amir, Colas, David, Voronova, Nina, Jamshidi-Ghaleh, Kazem, Dominici, Lorenzo, Laussy, and Fabrice P.
Publikováno v:
Nanophotonics, vol. 11, no. 12, 2022, pp. 2909-2919
Quantum vortices are the quantized version of classical vortices. Their center is a phase singularity or vortex core around which the flow of particles as a whole circulates and is typical in superfluids, condensates and optical fields. However, the
Externí odkaz:
http://arxiv.org/abs/2203.03889
Autor:
Dominici, Lorenzo, Rahmani, Amir, Colas, David, Ballarini, Dario, De Giorgi, Milena, Gigli, Giuseppe, Laussy, Fabrice P., Sanvitto, Daniele, Voronova, Nina
Publikováno v:
Commun. Phys. 6, 197 (2023)
The Berry curvature provides a powerful tool to unify several branches of science through their geometrical aspect: topology, energy bands, spin and vector fields. While quantum defects -- phase vortices and skyrmions -- have been in the spotlight, a
Externí odkaz:
http://arxiv.org/abs/2202.13210
Autor:
Dominici, Lorenzo, Voronova, Nina, Colas, David, Gianfrate, Antonio, Rahmani, Amir, Ardizzone, Vincenzo, Ballarini, Dario, De Giorgi, Milena, Gigli, Giuseppe, Laussy, Fabrice P., Sanvitto, Daniele
Publikováno v:
Opt. Express 29, 37262 (2021)
Quantum vortices are the analogue of classical vortices in optics, Bose-Einstein condensates, superfluids and superconductors, where they provide the elementary mode of rotation and orbital angular momentum. While they mediate important pair interact
Externí odkaz:
http://arxiv.org/abs/2108.02097
Autor:
Colas, David
Publikováno v:
Phys. Rev. Research 2, 033274 (2020)
Self-accelerating beams are fascinating solutions of the Schr\"odinger equation. Thanks to their particular phase engineering, they can accelerate without the need of external potentials or applied forces. Finite-energy approximations of these beams
Externí odkaz:
http://arxiv.org/abs/2006.12743
Publikováno v:
Phys. Rev. Research 2, 023337 (2020)
Accelerating beams are wave packets which appear to spontaneously accelerate without external potentials or applied forces. Since their first physical realisation in the form of Airy beams, they have found applications on various platforms, spanning
Externí odkaz:
http://arxiv.org/abs/1912.10408
Publikováno v:
Phys. Rev. B 99, 214301 (2019)
X-waves are an example of a localized wave packet solution of the homogeneous wave equation, and can potentially arise in any area of physics relating to wave phenomena, such as acoustics, electromagnetism, or quantum mechanics. They have been predic
Externí odkaz:
http://arxiv.org/abs/1903.12357
Publikováno v:
Phys. Rev. Lett. 121, 055302 (2018)
Negative effective masses can be realised by engineering the dispersion relation in a variety of quantum systems. A recent experiment with spin-orbit coupled Bose-Einstein condensates has shown that a negative effective mass can halt the free expansi
Externí odkaz:
http://arxiv.org/abs/1801.04779
Autor:
Dominici, Lorenzo, Colas, David, Gianfrate, Antonio, Rahmani, Amir, Ardizzone, Vincenzo, Ballarini, Dario, De Giorgi, Milena, Gigli, Giuseppe, Laussy, Fabrice P., Sanvitto, Daniele, Voronova, Nina
Publikováno v:
Phys. Rev. Research 3, 013007 (2021)
Strongly-coupled quantum fields, such as multi-component atomic condensates, optical fields and polaritons, are remarkable systems where the simple dynamics of coupled oscillators can meet the intricate phenomenology of quantum fluids. When the coupl
Externí odkaz:
http://arxiv.org/abs/1801.02580
Autor:
Colas, David, Laussy, Fabrice
Publikováno v:
Phys. Rev. Lett. 116, 026401 (2016)
We study the propagation of non-interacting polariton wavepackets. We show how two qualitatively different concepts of mass that arise from the peculiar polariton dispersion lead to a new type of particle-like object from non-interacting fields---muc
Externí odkaz:
http://arxiv.org/abs/1507.02676