Zobrazeno 1 - 10
of 147
pro vyhledávání: '"Bednorz, Adam"'
No-signaling is a consequence of the no-communication theorem that states that bipartite systems cannot transfer information unless a communication channel exists. It is also a by-product of the assumptions of Bell theorem about quantum nonlocality.
Externí odkaz:
http://arxiv.org/abs/2409.11348
Publikováno v:
Advanced Quantum Technologies, 2400264 (2024)
We construct a null test of the two-level space of a qubit, which is both device independent and needs a small number of different experiments. We demonstrate its feasibility on IBM Quantum, with most qubits failing the test by more than 10 standard
Externí odkaz:
http://arxiv.org/abs/2405.18827
We improve the test to show the impossibility of a quantum theory based on real numbers by a larger ratio of complex-to-real bound on a Bell-type parameter. In contrast to previous theoretical and experimental proposals the test requires three settin
Externí odkaz:
http://arxiv.org/abs/2405.03013
We present a precise certification test of the dimension of a qubit system on the public IBM quantum computer, using the determinant dimension witness and with a minimal number of independent parameters. We achieve it by mapping the Bloch sphere $\pi
Externí odkaz:
http://arxiv.org/abs/2404.06792
Publikováno v:
EPJ Quantum Technology 11, 62 (2024)
We investigate the dimensionality of bipartite quantum systems by construction of a device-independent null witness test. This test assesses whether a given bipartite state conforms with the expected quantum dimension, Schmidt number, and distinguish
Externí odkaz:
http://arxiv.org/abs/2312.13996
Publikováno v:
Phys. Rev. A 109, L020201 (2024)
We present a simple null test of a dimension of a quantum system, using a single repeated operation in the method of delays, assuming that each instance is identical and independent. The test is well-suited to current feasible quantum technologies, w
Externí odkaz:
http://arxiv.org/abs/2308.11246
Autor:
Bednorz, Adam
Publikováno v:
Phys. Rev. D 108, 056020 (2023)
Single particle detection is described in a limited way by simple models of measurements in quantum field theory. We show that a general approach, using Kraus operators in spacetime constructed from natural combinations of fields, leads to an efficie
Externí odkaz:
http://arxiv.org/abs/2305.12765
Autor:
Batle, Josep, Bednorz, Adam
Publikováno v:
Phys. Rev. A 108, 062202 (2023)
We present a null witness of the dimension of a quantum system, discriminating real, complex and classical spaces, based on equality due to linear independence. The witness involves only a single measurement with sufficiently many outcomes and prepar
Externí odkaz:
http://arxiv.org/abs/2305.08395
Publikováno v:
EPJ Quantum Technol. 11, 21 (2024)
We demonstrate an implementation of the precise test of dimension on the qubit, using the public IBM quantum computer, using the determinant dimension witness. The accuracy is below $10^{-3}$ comparing to maximal possible value of the witness in high
Externí odkaz:
http://arxiv.org/abs/2301.03296
Autor:
Bednorz, Adam, Batle, Josep
Publikováno v:
Phys. Rev. A 106, 042207 (2022)
We find the minimal number of settings to test quantum theory based on real numbers, assuming separability of the sources, modifying the recent proposal [M.-O. Renou et al., Nature 600, 625 (2021)]. The test needs only three settings for observers $A
Externí odkaz:
http://arxiv.org/abs/2206.02212