Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Pusey, Matthew F."'
Publikováno v:
Phys. Rev. Research 6, 023038 (2024)
The classical causal relations between a set of variables, some observed and some latent, can induce both equality constraints (typically conditional independences) as well as inequality constraints (Instrumental and Bell inequalities being prototypi
Externí odkaz:
http://arxiv.org/abs/2308.02380
Publikováno v:
Phys. Rev. Lett. 129, 120403, 2022
We give a complete characterization of the (non)classicality of all stabilizer subtheories. First, we prove that there is a unique nonnegative and diagram-preserving quasiprobability representation of the stabilizer subtheory in all odd dimensions, n
Externí odkaz:
http://arxiv.org/abs/2101.06263
Publikováno v:
Quantum 8, 1283 (2024)
It is useful to have a criterion for when the predictions of an operational theory should be considered classically explainable. Here we take the criterion to be that the theory admits of a generalized-noncontextual ontological model. Existing works
Externí odkaz:
http://arxiv.org/abs/2005.07161
The non-classicality of single quantum systems can be formalised using the notion of contextuality. But can contextuality be convincingly demonstrated in an experiment, without reference to the quantum formalism? The operational approach to contextua
Externí odkaz:
http://arxiv.org/abs/1904.08699
Publikováno v:
Phys. Rev. A 100, 042116 (2019)
Weak values are quantities accessed through quantum experiments involving weak measurements and post-selection. It has been shown that 'anomalous' weak values (those lying beyond the eigenvalue range of the corresponding operator) defy classical expl
Externí odkaz:
http://arxiv.org/abs/1812.06940
Publikováno v:
PRX Quantum 2, 020302 (2021)
Many experiments in the field of quantum foundations seek to adjudicate between quantum theory and speculative alternatives to it. This requires one to analyze the experimental data in a manner that does not presume the correctness of the quantum for
Externí odkaz:
http://arxiv.org/abs/1710.05948
Publikováno v:
Proc. R. Soc. A 473 (2205), p. 20170395 (2017)
Standard quantum theory represents a composite system at a given time by a joint state, but it does not prescribe a joint state for a composite of systems at different times. If a more even-handed treatment of space and time is possible, then such a
Externí odkaz:
http://arxiv.org/abs/1607.03637
Publikováno v:
Phys. Rev. Lett. 117, 190402 (2016)
Constructing local hidden variable (LHV) models for entangled quantum states is challenging, as the model should reproduce quantum predictions for all possible local measurements. Here we present a simple method for building LHV models, applicable to
Externí odkaz:
http://arxiv.org/abs/1512.00262
Publikováno v:
Quantum Stud.: Math. Found. 5, 189 (2018)
"Protective measurement" refers to two related schemes for finding the expectation value of an observable without disturbing the state of a quantum system, given a single copy of the system that is subject to a "protecting" operation. There have been
Externí odkaz:
http://arxiv.org/abs/1509.08893
Autor:
Pusey, Matthew F., Leifer, Matthew S.
Publikováno v:
EPTCS 195, 2015, pp. 295-306
If a quantum system is prepared and later post-selected in certain states, "paradoxical" predictions for intermediate measurements can be obtained. This is the case both when the intermediate measurement is strong, i.e. a projective measurement with
Externí odkaz:
http://arxiv.org/abs/1506.07850