Zobrazeno 1 - 10
of 757
pro vyhledávání: '"Kleinmann P"'
Autor:
de Gois, Carlos, Kleinmann, Matthias
Publikováno v:
Phys. Rev. A 109, 062417 (2024)
Quantum state tomography is the standard technique for reconstructing a quantum state from experimental data. In the regime of finite statistics, experimental data cannot give perfect information about the quantum state. A common way to express this
Externí odkaz:
http://arxiv.org/abs/2308.01851
MIP*=RE implies that C_{qa} (the closure of the set of tensor product correlations) and C_{qc} (the set of commuting correlations) can be separated by a hyperplane (i.e., a Bell-like inequality) and that there are correlations produced by commuting m
Externí odkaz:
http://arxiv.org/abs/2307.02920
Quantum theory allows for different classes of correlations, such as entanglement, steerability or Bell-nonlocality. Experimental demonstrations of the preparation of quantum states within specific classes and their subsequent interconversion have be
Externí odkaz:
http://arxiv.org/abs/2305.03748
Publikováno v:
New J. Phys. 25 113018 (2023)
The quantum state associated to an unknown experimental preparation procedure can be determined by performing quantum state tomography. If the statistical uncertainty in the data dominates over other experimental errors, then a tomographic reconstruc
Externí odkaz:
http://arxiv.org/abs/2303.07136
Autor:
Plávala, Martin, Kleinmann, Matthias
Publikováno v:
Phys. Rev. A 108, 052212 (2023)
We show that the phase-space formulation of general probabilistic theories can be extended to include a generalized time-evolution and that it can describe a nonquantum hydrogen-like system which is stable, has discrete energy levels, and includes th
Externí odkaz:
http://arxiv.org/abs/2212.12267
Autor:
Gaida, Michael, Kleinmann, Matthias
An entangled state is bound entangled, if one cannot combine any number of copies of the state to a maximally entangled state, by using only local operations and classical communication. If one formalizes this notion of bound entanglement, one arrive
Externí odkaz:
http://arxiv.org/abs/2212.11015
A set of quantum measurements exhibits quantum contextuality when any consistent value assignment to the measurement outcomes leads to a contradiction with quantum theory. In the original Kochen-Specker-type of argument the measurement projectors are
Externí odkaz:
http://arxiv.org/abs/2207.11183
Publikováno v:
Phys. Rev. A 104, 062431 (2021)
The number of outcomes is a defining property of a quantum measurement, in particular, if the measurement cannot be decomposed into simpler measurements with fewer outcomes. Importantly, the number of outcomes of a quantum measurement can be irreduci
Externí odkaz:
http://arxiv.org/abs/2105.09925
Autor:
Vitagliano, Giuseppe, Fadel, Matteo, Apellaniz, Iagoba, Kleinmann, Matthias, Lücke, Bernd, Klempt, Carsten, Tóth, Géza
Publikováno v:
Quantum 7, 914 (2023)
We present a method to detect bipartite entanglement based on number-phase-like uncertainty relations in split spin ensembles. First, we derive an uncertainty relation that plays the role of a number-phase uncertainty for spin systems. It is importan
Externí odkaz:
http://arxiv.org/abs/2104.05663
Publikováno v:
Rev. Mod. Phys. 94, 045007 (2022)
A central result in the foundations of quantum mechanics is the Kochen-Specker theorem. In short, it states that quantum mechanics is in conflict with classical models in which the result of a measurement does not depend on which other compatible mea
Externí odkaz:
http://arxiv.org/abs/2102.13036