29 citations · 131 across the 16 of their papers we have counts for
16 papers
Bell tests for collider decay processes
Danilo M. Fucci, Alexandre C. Orthey, Alan J. Barr +1
We propose Bell tests for collider decays using independently sampled analysis axes as settings and detector regions to assign binary or null outcomes. We show that a Bell violatio…
Robust self-test of the maximally entangled state of two-qubits without assuming unitary observables
Alexandre C. Orthey, Magdalena Stobińska-Moretto
Standard device-independent self-testing uses Naimark dilation to assume projective measurements, masking the operational limitations of realistic non-unitary observables. We estab…
Optimality of universal conclusive entanglement concentration protocols
Alexandre C. Orthey, Aby Philip, Tulja Varun Kondra +1
Entanglement concentration is essential for quantum technologies, yet rigorous bounds on the success probability for universal protocols (those requiring no prior knowledge about t…
Geometric monotones of violations of quantum realism
Alexandre C. Orthey, Alexander Streltsov
Quantum realism, as introduced by Bilobran and Angelo [EPL 112, 40005 (2015)], states that projective measurements in quantum systems establish the reality of physical properties,…
Certifying classes of -outcome measurements with quantum steering
Alexandre C. Orthey, Remigiusz Augusiak
Device-independent (DI) certification schemes are based on minimal assumptions about the quantum system under study, which makes the most desirable among certification schemes. How…
Quantum switch instabilities with an open control
Otavio A. D. Molitor, André H. A. Malavazi, Roberto Dobal Baldijão +3
The superposition of causal order shows promise in various quantum technologies. However, the fragility of quantum systems arising from environmental interactions, leading to dissi…
Almost device-independent certification of GME states with minimal measurements
Shubhayan Sarkar, Alexandre C. Orthey, Gautam Sharma +2
Device-independent certification of quantum states enables the characterization of states within a device under minimal physical assumptions. A major problem in this regard is to c…
A universal scheme to self-test any quantum state or measurement
Shubhayan Sarkar, Alexandre C. Orthey, Remigiusz Augusiak
The emergence of quantum devices has raised a significant issue: how to certify the quantum properties of a device without placing trust in it. To characterise quantum states and m…
Correcting for finite statistics effects in a quantum steering experiment
Sophie Engineer, Ana C. S. Costa, Alexandre C. Orthey +7
Verifying entanglement between parties is essential for creating secure quantum communication. However, finite statistics can lead to false positive outcomes in any tests for entan…
High-dimensional monitoring and the emergence of realism via multiple observers
Alexandre C. Orthey, Pedro R. Dieguez, Owidiusz Makuta +1
Correlation is the basic mechanism of every measurement model, as one never accesses the measured system directly. Instead, correlations are created, codifying information about th…
Quantum realism: axiomatization and quantification
Alexandre C. Orthey, R. M. Angelo
The emergence of an objective reality in line with the laws of the microscopic world has been the focus of longstanding debates. Recent approaches seem to have reached a consensus…
Nonlocality, quantum correlations, and violations of classical realism in the dynamics of two noninteracting quantum walkers
Alexandre C. Orthey, R. M. Angelo
That quantum correlations can be generated over time between the spin and the position of a quantum walker is indisputable. The creation of bipartite entanglement has also been rep…
Connecting velocity and entanglement in quantum walks
Alexandre C. Orthey, Edgard P. M. Amorim
We investigate the relation between transport properties and entanglement between the internal (spin) and external (position) degrees of freedom in one-dimensional discrete time qu…
Weak disorder enhancing the production of entanglement in quantum walks
Alexandre C. Orthey, Edgard P. M. Amorim
We find out a few ways to improve the realization of entanglement between the internal (spin) and external (position) degrees of freedom of a quantum particle, through the insertio…
On the spreading of quantum walks starting from local and delocalized states
Alexandre C. Orthey, Edgard P. M. Amorim
We investigate the ballistic spreading behavior of the one-dimensional discrete time quantum walks whose time evolution is driven by any balanced quantum coin. We obtain closed-for…
Asymptotic entanglement in quantum walks from delocalized initial states
Alexandre C. Orthey, Edgard P. M. Amorim
We study the entanglement between the internal (spin) and external (position) degrees of freedom of the one-dimensional discrete time quantum walk starting from local and delocaliz…