Zobrazeno 1 - 10
of 529
pro vyhledávání: '"Scarani, Valerio"'
Autor:
Zaw, Lin Htoo, Scarani, Valerio
Tsirelson's precession protocol is a nonclassicality witness that can be defined for both discrete and continuous variable systems. Its original version involves measuring a precessing observable, like the quadrature of a harmonic oscillator or a com
Externí odkaz:
http://arxiv.org/abs/2411.03132
Autor:
Vaartjes, Arjen, Nurizzo, Martin, Zaw, Lin Htoo, Wilhelm, Benjamin, Yu, Xi, Holmes, Danielle, Schwienbacher, Daniel, Kringhøj, Anders, van Blankenstein, Mark R., Jakob, Alexander M., Hudson, Fay E., Itoh, Kohei M., Murray, Riley J., Blume-Kohout, Robin, Anand, Namit, Dzurak, Andrew S., Jamieson, David N., Scarani, Valerio, Morello, Andrea
Spin precession is a textbook example of dynamics of a quantum system that exactly mimics its classical counterpart. Here we challenge this view by certifying the quantumness of exotic states of a nuclear spin through its uniform precession. The key
Externí odkaz:
http://arxiv.org/abs/2410.07641
Bayes' rule, which is routinely used to update beliefs based on new evidence, arises from a principle of minimal change. This principle states that updated beliefs must be consistent with new data, while deviating minimally from the prior belief. Her
Externí odkaz:
http://arxiv.org/abs/2410.00319
Informational contributions to thermodynamics can be studied in isolation by considering systems with fully-degenerate Hamiltonians. In this regime, being in non-equilibrium -- termed informational non-equilibrium -- provides thermodynamic resources,
Externí odkaz:
http://arxiv.org/abs/2409.12759
Fluctuation theorems are generalisations of the second law that describe the relations between work, temperature, and free energy in thermodynamic processes and are used extensively in studies of irreversibility and entropy. Many experiments have ver
Externí odkaz:
http://arxiv.org/abs/2406.09348
We introduce an even-parity precession protocol that can detect nonclassicality of some quantum states using only measurements of a uniformly-precessing variable at different points in time. Depending on the system under study, the protocol may detec
Externí odkaz:
http://arxiv.org/abs/2405.17966
Autor:
Sidajaya, Peter, Scarani, Valerio
Publikováno v:
Phys. Rev. A 109, 062408 (2024)
As a consequence of Bell's theorem, the statistics of measurements on some entangled states cannot be simulated with local hidden variables alone. The amount of communication that must be supplied is an intuitive quantifier of nonclassicality. While
Externí odkaz:
http://arxiv.org/abs/2402.02723
Tsirelson's original inequality for the precession protocol, first introduced for the harmonic oscillator but applicable to all uniformly-precessing systems, serves as a monopartite test of quantumness. Given that the system is undergoing a uniform p
Externí odkaz:
http://arxiv.org/abs/2401.16147
Publikováno v:
Phys. Rev. A 109, 042402 (2024)
We introduce entanglement witnesses for spin ensembles which detect genuine multipartite entanglement using only measurements of the total angular momentum. States that are missed by most other angular-momentum-based witnesses for spin ensembles, whi
Externí odkaz:
http://arxiv.org/abs/2311.00806
Of existing entanglement witnesses that utilize only collective measurements of a spin ensemble, not all can detect genuine multipartite entanglement (GME), and none can detect Greenberger-Horne-Zeilinger (GHZ) states beyond the tripartite case. We f
Externí odkaz:
http://arxiv.org/abs/2311.00805