221 citations · 1.2k across the 19 of their papers we have counts for
20 papers
Heuristic lower bounds on real Grothendieck constants of finite and infinite order
Erika Bene, Tamás Vértesi
We propose candidate lower bounds on the real Grothendieck constants and their infinite-dimensional limit using rotationally invariant cubic kern…
Cyclic Einstein-Podolsky-Rosen Steering
István Márton, Sándor Nagy, Erika Bene +1
Einstein-Podolsky-Rosen (EPR) steering is a form of quantum correlation that exhibits a fundamental asymmetry in the properties of quantum systems. Given two observers, Alice and B…
Experimentally friendly approach towards nonlocal correlations in multisetting N -partite Bell scenarios
Artur Barasiński, Antonín Černoch, Wiesław Laskowski +3
In this work, we study a recently proposed operational measure of nonlocality by Fonseca and Parisio~[Phys. Rev. A 92, 030101(R) (2015)] which describes the probability of violatio…
Bound entangled singlet-like states for quantum metrology
Károly F. Pál, Géza Tóth, Erika Bene +1
Bipartite entangled quantum states with a positive partial transpose (PPT), i.e., PPT entangled states, are usually considered very weakly entangled. Since no pure entanglement can…
A class of genuinely high-dimensionally entangled states with a positive partial transpose
Károly F. Pál, Tamás Vértesi
Entangled states with a positive partial transpose (so-called PPT states) are central to many interesting problems in quantum theory. On one hand, they are considered to be weakly…
Self-testing non-projective quantum measurements in prepare-and-measure experiments
Armin Tavakoli, Massimiliano Smania, Tamás Vértesi +2
Self-testing represents the strongest form of certification of a quantum system. Here we investigate theoretically and experimentally the question of self-testing non-projective qu…
Survey on the Bell nonlocality of a pair of entangled qudits
Alejandro Fonseca, Anna de Rosier, Tamás Vértesi +2
The question of how Bell nonlocality behaves in bipartite systems of higher dimensions is addressed. By employing the probability of violation of local realism under random measure…
Self-testing quantum states and measurements in the prepare-and-measure scenario
Armin Tavakoli, Jędrzej Kaniewski, Tamás Vértesi +2
The goal of self-testing is to characterize an a priori unknown quantum system based solely on measurement statistics, i.e. using an uncharacterized measurement device. Here we dev…
Geometry of the set of quantum correlations
Koon Tong Goh, Jędrzej Kaniewski, Elie Wolfe +5
It is well known that correlations predicted by quantum mechanics cannot be explained by any classical (local-realistic) theory. The relative strength of quantum and classical corr…
Qutrit witness from the Grothendieck constant of order four
Péter Diviánszky, Erika Bene, Tamás Vértesi
In this paper, we prove that , where denotes the Grothendieck constant of order . To this end, we use a branch-and-bound algorithm commonly used in the s…
Measurement incompatibility does not give rise to Bell violation in general
Erika Bene, Tamás Vértesi
In the case of a pair of two-outcome measurements incompatibility is equivalent to Bell nonlocality. Indeed, any pair of incompatible two-outcome measurements can violate the Claus…
Proposed experiment to test fundamentally binary theories
Matthias Kleinmann, Tamás Vértesi, Adán Cabello
Fundamentally binary theories are nonsignaling theories in which measurements of many outcomes are constructed by selecting from binary measurements. They constitute a sensible alt…
Better local hidden variable models for two-qubit Werner states and an upper bound on the Grothendieck constant
Flavien Hirsch, Marco Túlio Quintino, Tamás Vértesi +2
We consider the problem of reproducing the correlations obtained by arbitrary local projective measurements on the two-qubit Werner state …
Entanglement without hidden nonlocality
Flavien Hirsch, Marco Túlio Quintino, Joseph Bowles +2
We consider Bell tests in which the distant observers can perform local filtering before testing a Bell inequality. Notably, in this setup, certain entangled states admitting a loc…
Bounding the persistency of the nonlocality of W states
Péter Diviánszky, Réka Trencsényi, Erika Bene +1
The nonlocal properties of the W states are investigated under particle loss. By removing all but two particles from an -qubit W state, the resulting two-qubit state is still en…
Optimal randomness certification from one entangled bit
Antonio Acín, Stefano Pironio, Tamás Vértesi +1
By performing local projective measurements on a two-qubit entangled state one can certify in a device-independent way up to one bit of randomness. We show here that general measur…
Inequivalence of entanglement, steering, and Bell nonlocality for general measurements
Marco Túlio Quintino, Tamás Vértesi, Daniel Cavalcanti +4
Einstein-Podolsky-Rosen steering is a form of inseparability in quantum theory commonly acknowledged to be intermediate between entanglement and Bell nonlocality. However, this sta…
Translationally invariant multipartite Bell inequalities involving only two-body correlators
J. Tura, A. B. Sainz, T. Vértesi +3
Bell inequalities are natural tools that allow one to certify the presence of nonlocality in quantum systems. The known constructions of multipartite Bell inequalities contain, how…
Physical characterization of quantum devices from nonlocal correlations
Jean-Daniel Bancal, Miguel Navascués, Valerio Scarani +2
In the device-independent approach to quantum information theory, quantum systems are regarded as black boxes which, given an input (the measurement setting), return an output (the…
Large Berry phases in layered graphene
R. Englman, T. Vértesi
Brillouin zones of graphene systems possess Dirac points, where band degeneracies occur. We study the variety of (and large magnitude) phases that the electronic states can acquire…