Zobrazeno 1 - 10
of 1 477
pro vyhledávání: '"Bartkiewicz, A"'
Autor:
Bartkiewicz, A., Sanna, A., Szymczak, M., Moscadelli, L., van Langevelde, H. J., Wolak, P., Kobak, A., Durjasz, M.
Publikováno v:
A&A 686, A275 (2024)
Methanol masers at 6.7~GHz are well-known signposts of high-mass star-forming regions. [...] We aim to understand the origin of the ring-like structures outlined by methanol maser emission in a number of sources. This emission could be, a priori, spa
Externí odkaz:
http://arxiv.org/abs/2404.07333
Publikováno v:
Phys. Rev. A 110, 023720 (2024)
Entanglement potentials (EPs) enable the characterization and quantification of the nonclassicality of single-mode optical fields by measuring the entanglement generated through beam splitting. We experimentally generated single-photon states and tom
Externí odkaz:
http://arxiv.org/abs/2401.15995
Hamiltonian exceptional points (HEPs) are spectral degeneracies of non-Hermitian Hamiltonians describing classical and semiclassical open systems with gain and/or loss. However, this definition overlooks the occurrence of quantum jumps in the evoluti
Externí odkaz:
http://arxiv.org/abs/2401.14993
Autor:
Szymczak, M., Durjasz, M., Goedhart, S., Wolak, P., Bartkiewicz, A., Garatti, A. Caratti o, Kobak, A., Massi, F.
Aims: We report the discovery and analysis of a periodic methanol maser in the massive protostar IRAS 20216+4104. Methods: To obtain the light curve, we used the 6.7 GHz methanol maser spectra collected between 2000-2003 and 2009-2023 with the Harteb
Externí odkaz:
http://arxiv.org/abs/2312.01978
Autor:
Miranowicz, Adam, Kadlec, Josef, Bartkiewicz, Karol, Černoch, Antonín, Chen, Yueh-Nan, Lemr, Karel, Nori, Franco
Entanglement potentials are popular measures of the nonclassicality of single-mode optical fields. These potentials are defined by the amount of entanglement (measured by, e.g., the negativity or concurrence) of the two-mode field generated by mixing
Externí odkaz:
http://arxiv.org/abs/2309.12930
Publikováno v:
Opt. Express 32, 2333-2346 (2024)
Entanglement potentials are a promising way to quantify the nonclassicality of single-mode states. They are defined by the amount of entanglement (expressed by, e.g., the Wootters concurrence) obtained after mixing the examined single-mode state with
Externí odkaz:
http://arxiv.org/abs/2309.12878
Autor:
Trávníček, Vojtěch, Roik, Jan, Bartkiewicz, Karol, Černoch, Antonín, Horodecki, Paweł, Lemr, Karel
In this paper, we present a supervised learning technique that utilizes artificial neural networks to design new collective entanglement witnesses for two-qubit and qubit-qutrit systems. Machine-designed collective entanglement witnesses allow for co
Externí odkaz:
http://arxiv.org/abs/2307.08293
Autor:
Aberfelds, A, Bartkiewicz, A, Szymczak, M, Šteinbergs, J, Surcis, G, Kobak, A, Durjasz, M, Shmeld, I
Publikováno v:
MNRAS, Volume 524, Issue 1, September 2023, Pages 599-618
{The variability study of 6.7\,GHz methanol masers has become a useful way to improve our understanding of the physical conditions in high-mass star-forming regions.} {Based on the single-dish monitoring using the Irbene telescopes, we selected three
Externí odkaz:
http://arxiv.org/abs/2307.03663
Autor:
Chimczak, Grzegorz, Kowalewska-Kudłaszyk, Anna, Lange, Ewelina, Bartkiewicz, Karol, Peřina Jr, Jan
Publikováno v:
Scientific Reports volume 13, Article number: 5859 (2023)
We analyse two quantum systems with hidden parity-time (PT) symmetry: one is an optical device, whereas another is a superconducting microwave-frequency device. To investigate their symmetry, we introduce an equilibrium frame, in which loss and gain
Externí odkaz:
http://arxiv.org/abs/2305.08150
Autor:
Burns, R. A., Uno, Y., Sakai, N., Blanchard, J., Rosli, Z., Orosz, G., Yonekura, Y., Tanabe, Y., Sugiyama, K., Hirota, T., Kim, Kee-Tae, Aberfelds, A., Volvach, A. E., Bartkiewicz, A., Garatti, A. Caratti o, Sobolev, A. M., Stecklum, B., Brogan, C., Phillips, C., Ladeyschikov, D. A., Johnstone, D., Surcis, G., MacLeod, G. C., Linz, H., Chibueze, J. O., Brand, J., Eislöffel, J., Hyland, L., Uscanga, L., Olech, M., Durjasz, M., Bayandina, O., Breen, S., Ellingsen, S. P., Heever, S. P. van den, Hunter, T. R., Chen, X.
High-mass protostars (M$_{\star} >$ 8 M$_{\odot}$) are thought to gain the majority of their mass via short, intense bursts of growth. This episodic accretion is thought to be facilitated by gravitationally unstable and subsequently inhomogeneous acc
Externí odkaz:
http://arxiv.org/abs/2304.14740