Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Julian D. Töpfer"'
Autor:
Tamsin Cookson, Kirill Kalinin, Helgi Sigurdsson, Julian D. Töpfer, Sergey Alyatkin, Matteo Silva, Wolfgang Langbein, Natalia G. Berloff, Pavlos G. Lagoudakis
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-11 (2021)
There is interest in studying vorticity in systems of light-matter interaction using different platforms. Here, the authors show vortices of topological charge more than one and their scaling in an exciton-polariton condensate using GaAs microcavity
Externí odkaz:
https://doaj.org/article/1c7e9509a1fb443387ef4a4c0c95f738
Autor:
Kirill A. Sitnik, Sergey Alyatkin, Julian D. Töpfer, Ivan Gnusov, Tamsin Cookson, Helgi Sigurdsson, Pavlos G. Lagoudakis
Publikováno v:
Physical Review Letters. 128
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e5ccb78da6c1ec73c73b8d490a6d55a
https://doi.org/10.1103/physrevlett.128.237402
https://doi.org/10.1103/physrevlett.128.237402
Autor:
Sergey Alyatkin, Julian D. Töpfer, Pavlos G. Lagoudakis, Helgi Sigurdsson, Alexis Askitopoulos
Publikováno v:
Nature Communications
Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)
Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)
One of the recently established paradigms in condensed matter physics is examining a system’s behaviour in artificial potentials, giving insight into phenomena of quantum fluids in hard-to-reach settings. A prominent example is the matter-wave scat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f2b6684c62f0266855cbc253fe63807
http://europepmc.org/articles/PMC8458361
http://europepmc.org/articles/PMC8458361
Autor:
Julian D. Töpfer, Tamsin Cookson, Ioannis Chatzopoulos, Pavlos G. Lagoudakis, Helgi Sigurdsson, Yuri G. Rubo
Artificial lattices of coherently coupled macroscopic states are at the heart of applications ranging from solving hard combinatorial optimization problems to simulating complex many-body physical systems. The size and complexity of the problems scal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb410755a2a4644b73f54b166129dbca
https://eprints.soton.ac.uk/445855/
https://eprints.soton.ac.uk/445855/
Autor:
Julian D. Töpfer, Sergey Alyatkin, Helgi Sigurdsson, Ivan Gnusov, Pavlos G. Lagoudakis, Stepan Baryshev
Publikováno v:
Physical Review Applied
We demonstrate all-optical linear polarization control in semiconductor microcavities using an exciton-polariton condensate in an elliptically shaped optical trap. The microcavity inherent TE-TM splitting lifts the pseudospin degeneracy of the anisot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13986bfbb698c01f53bb5276de35fad5
Autor:
Helgi Sigurdsson, Sergey Alyatkin, Julian D. Töpfer, Alexis Askitopoulos, Pavlos G. Lagoudakis
Publikováno v:
Physical Review Letters. 124
We demonstrate deterministic control of the nearest and next-nearest neighbor coupling in the unit cell of a square lattice of microcavity exciton-polariton condensates. We tune the coupling in a continuous and reversible manner by optically imprinti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::549f903e46c48fbd4d5959319f92c946
https://doi.org/10.1103/physrevlett.124.207402
https://doi.org/10.1103/physrevlett.124.207402
Publikováno v:
Communications Physics, Vol 3, Iss 1, Pp 1-8 (2020)
Non-linearity and finite signal propagation speeds are omnipresent in nature, technologies, and real-world problems, where efficient ways of describing and predicting the effects of these elements are in high demand. Advances in engineering condensed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08e97f171c265f71a0ba47d76dd592be
https://doi.org/10.1038/s42005-019-0271-0
https://doi.org/10.1038/s42005-019-0271-0
We demonstrate a regime in which matter-wave condensates of exciton-polaritons trapped in an elliptically shaped two-dimensional potential appear as a coherent mixture of ground and first-excited state of the quantum harmonic oscillator. This system
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9510352c31a4f205637b3d94b1e75326
Autor:
Wolfgang Werner Langbein, Natalia G. Berloff, Pasquale Cilibrizzi, Kirill P. Kalinin, Julian D. Töpfer, Matteo Silva, Alexis Askitopoulos, Pavlos G. Lagoudakis
The vast majority of real-life optimization problems with a large number of degrees of freedom are intractable by classical computers, since their complexity grows exponentially fast with the number of variables. Many of these problems can be mapped
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4425df4d7bd2a53ad506166000ba7782
Autor:
Kirill P. Kalinin, Pavlos G. Lagoudakis, Julian D. Töpfer, Wolfgang Werner Langbein, Pasquale Cilibrizzi, Matteo Silva, Alexis Askitopoulos, Natalia G. Berloff
Publikováno v:
Scopus-Elsevier
Solving large optimization problems lies at heart of modem science and technology from social sciences to technological applications, i.e. protein design [1]. Recently, we proposed a new platform for an analog Hamiltonian simulator based on polariton
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::55a6cbdc0c7a8db2a92be0ad8bf37712
https://doi.org/10.1109/cleoe-eqec.2017.8087623
https://doi.org/10.1109/cleoe-eqec.2017.8087623