Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Wołoncewicz, Bianka"'
Autor:
Schlichtholz, Konrad, Woloncewicz, Bianka, Das, Tamoghna, Markiewicz, Marcin, Żukowski, Marek
We present a single-photon based device-independent quantum key distribution scheme secure even against no-signaling eavesdropping, which covers quantum attacks, as well as ones beyond laws of physics but still obeying the rules for spatially separat
Externí odkaz:
http://arxiv.org/abs/2311.07451
Publikováno v:
PRX Quantum 5, 010318 (2024)
In plethora of physical situations one can distinguish a mediator -- a system that couples other, non-interacting systems. Often the mediator itself is not directly accessible to experimentation, yet it is interesting and sometimes crucial to underst
Externí odkaz:
http://arxiv.org/abs/2303.12428
Better versions of separability conditions for four mode optical fields, i.e. two beams with two modes of mutually orthogonal polarization are given. Our conditions involve variances. Their meaning is intuitive and their implementation is feasible. N
Externí odkaz:
http://arxiv.org/abs/2205.05641
We introduce a simplified form of Stokes operators for quantum optical fields that involve the known concept of binning. Behind polarization analyzer photon numbers (more generally intensities) are measured. If the value obtained in one of the output
Externí odkaz:
http://arxiv.org/abs/2112.00084
Autor:
Das, Tamoghna, Karczewski, Marcin, Mandarino, Antonio, Markiewicz, Marcin, Woloncewicz, Bianka, Żukowski, Marek
Publikováno v:
New J. Phys. 24 038001 (2022)
We comment on the purported violation of local realism, by a single photon induced correlations between homodyne detectors, which one can find in: New J. Phys. 10, 113024 (2008), [arXiv:0807.0109]. The claim is erroneous, due to a calculational mista
Externí odkaz:
http://arxiv.org/abs/2107.07951
Autor:
Das, Tamoghna, Karczewski, Marcin, Mandarino, Antonio, Markiewicz, Marcin, Woloncewicz, Bianka, Żukowski, Marek
Publikováno v:
New J. Phys. 24, 033017 (2022)
Non-existence of a local hidden variables (LHV) model for a phenomenon benchmarks its use in device-independent quantum protocols. Nowadays photon-number resolving weak-field homodyne measurements allow realization of emblematic gedanken experiments.
Externí odkaz:
http://arxiv.org/abs/2104.10703
Autor:
Das, Tamoghna, Karczewski, Marcin, Mandarino, Antonio, Markiewicz, Marcin, Woloncewicz, Bianka, Żukowski, Marek
Publikováno v:
New J. Phys. 23 073042 (2021)
We reconsider the all-optical homodyne-measurement based experimental schemes that aim to reveal Bell nonclassicality of a single photon, often termed `nonlocality'. We focus on the schemes put forward by Tan, Walls and Collett (TWC, 1991) and Hardy
Externí odkaz:
http://arxiv.org/abs/2102.06689
Autor:
Das, Tamoghna, Karczewski, Marcin, Mandarino, Antonio, Markiewicz, Marcin, Woloncewicz, Bianka, Żukowski, Marek
We investigate the interferometric scheme put forward by Tan, Walls and Collett [Phys. Rev. Lett. {\bf 66}, 256 (1991)] that aims to reveal Bell non-classicality of a single photon. By providing a local hidden variable model that reproduces their res
Externí odkaz:
http://arxiv.org/abs/2102.03254
Publikováno v:
Phys. Rev. A 103, 042226 (2021)
With the emerging possibility to obtain emissions of triples of GHZ-entangled photons via a direct parametric generation we study here bright emissions of this kind which involve higher order emissions of two triples, three triples, etc. Such states
Externí odkaz:
http://arxiv.org/abs/2009.03357
Publikováno v:
Quantum Reports. 2020; 2(1):49-56
We discuss the use of the Gilbert algorithm to tailor entanglement witnesses for unextendibleproduct basis bound entangled states (UPB BE states). The method relies on the fact that an optimalentanglement witness is given by a plane perpendicular to
Externí odkaz:
http://arxiv.org/abs/1912.06569