Zobrazeno 1 - 10
of 21
pro vyhledávání: '"L. A. Toikka"'
Autor:
L A Toikka
Publikováno v:
New Journal of Physics, Vol 21, Iss 11, p 113033 (2019)
By solving the Bogoliubov–de Gennes equations analytically, we derive the fermionic zero-modes satisfying the Majorana property that exist in vortices of a two-dimensional s -wave Fermi superfluid with spin–orbit coupling and Zeeman spin-splittin
Externí odkaz:
https://doaj.org/article/52a8cfa7c3f948c5a5631cef2b0a7752
Autor:
L A Toikka, J Brand
Publikováno v:
New Journal of Physics, Vol 19, Iss 2, p 023029 (2017)
Vortex motion is a complex problem due to the interplay between the short-range physics at the vortex core level and the long-range hydrodynamical effects. Here we show that the hydrodynamic equations of vortex motion in a compressible superfluid can
Externí odkaz:
https://doaj.org/article/7802bcca6b10417eb58b880c43ffb84b
Autor:
L. A. Toikka
We observe the onset of non-ergodicity from ballistic propagation of a two-body bound state in an interacting discrete-time quantum walk (DTQW) due to time-dependent disorder in the interaction. The effect of the disorder on the two-body state can be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1fa06508710329a49f0eab0cf2d9e966
http://arxiv.org/abs/1911.06246
http://arxiv.org/abs/1911.06246
Autor:
L. A. Toikka
By solving the Bogoliubov–de Gennes equations analytically, we derive the fermionic zero-modes satisfying the Majorana property that exist in vortices of a two-dimensional s-wave Fermi superfluid with spin–orbit coupling and Zeeman spin-splitting
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2668f2f51aebd75bf3f36b8c10da35b5
http://arxiv.org/abs/1903.09131
http://arxiv.org/abs/1903.09131
We demonstrate the possibility to build stable Josephson $\pi$-junction stripes with exciton-polariton condensates. The stability of the $\pi$-junction between arbitrary long polariton stripes is achieved at low pumping by balancing the snaking insta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c5f02214f758a29cc61fb82bc135b7f
Autor:
L A Toikka
Publikováno v:
New Journal of Physics, Vol 16, Iss 4, p 043011 (2014)
We demonstrate the self-interference of a single Bose–Einstein condensate on a non-simply connected geometry, focussing on a toroidally trapped ring-shaped condensate. First, we show how the opposite parts of the ring can interfere using the Wigner
Externí odkaz:
https://doaj.org/article/70f1faf340894f02b10ba09e49408037
The interplay of spin-orbit coupling and Zeeman splitting in ultracold Fermi gases gives rise to a topological superfluid phase in two spatial dimensions that can host exotic Majorana excitations. Theoretical models have so far been based on a four-b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a605b4458a6e796f26e4202296adf93
http://arxiv.org/abs/1803.05579
http://arxiv.org/abs/1803.05579
Autor:
L. A. Toikka
Publikováno v:
Physical Review A. 96
Using a (1+2)-dimensional boson-vortex duality between non-linear electrodynamics and a two-component compressible Bose-Einstein condensate (BEC) with spin-orbit (SO) coupling, we obtain generalised versions of the hydrodynamic continuity and Euler e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9cfcf2ffa7a13ec7d1baa44d575b2215
https://doi.org/10.1103/physreva.96.033611
https://doi.org/10.1103/physreva.96.033611
Autor:
Kalle-Antti Suominen, L. A. Toikka
Publikováno v:
Physical Review A. 93
We consider analytically the dynamics of an arbitrary number and configuration of vortices in an annular Bose-Einstein condensate obtaining expressions for the free energy and vortex precession rates to logarithmic accuracy. We also obtain lower boun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4906bab3896da6ad97caf815281114e
http://juuli.fi/Record/0253125116
http://juuli.fi/Record/0253125116
Autor:
Alexei Andreanov, L. A. Toikka
Publikováno v:
Journal of Physics A: Mathematical and Theoretical. 52:02LT04
We formulate the necessary and sufficient conditions for the existence of dispersionless energy eigenvalues (so-called `flat bands') and their associated compact localized eigenstates in $M$-dimensional tight-binding lattices with $N$ sites per unit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec921e1a8ac5d8bb2b7f72a461cda5ad
https://doi.org/10.1088/1751-8121/aaf25c
https://doi.org/10.1088/1751-8121/aaf25c