71 citations · 284 across the 21 of their papers we have counts for
21 papers
Minimal representations of topology-preserving quantum-like states
William Horvat, Debadrita Saha, Nicolás Gigena +2
We provide an equitable partition that gives an exact, minimal representation for the graph Cartesian product formed from quantum-like bits that preserves the relevant spectral and…
Machine learning meets the CHSH scenario
Gabriel Pereira Alves, Nicolas Gigena, Jędrzej Kaniewski
In this work, we perform a comprehensive study of the machine learning (ML) methods for the purpose of characterising the quantum set of correlations. As our main focus is on asses…
Bipartite representations and many-body entanglement of pure states of indistinguishable particles
J. A. Cianciulli, R. Rossignoli, M. Di Tullio +2
We analyze a general bipartite-like representation of arbitrary pure states of indistinguishable particles, valid for both bosons and fermions, based on - and -partic…
Revisited aspects of the local set in CHSH Bell scenario
Nicolas Gigena, Giovanni Scala, Antonio Mandarino
The Bell inequalities stand at the cornerstone of the developments of quantum theory on both the foundational and applied side. The discussion started as a way to test whether the…
Biased Random Access Codes
Gabriel Pereira Alves, Nicolas Gigena, Jędrzej Kaniewski
A random access code (RAC) is a communication task in which the sender encodes a random message into a shorter one to be decoded by the receiver so that a randomly chosen character…
Quantum value for a family of -like Bell functionals
N. Gigena, J. Kaniewski
We introduce a three-parameter family of Bell functionals that extends those studied in reference [Phys. Rev. Research 2, 033420 (2020)] by including a marginal contribution. An an…
Computable and operationally meaningful multipartite entanglement measures
Jacob L. Beckey, N. Gigena, Patrick J. Coles +1
Multipartite entanglement is an essential resource for quantum communication, quantum computing, quantum sensing, and quantum networks. The utility of a quantum state, ,…
Many-body entanglement in fermion systems
N. Gigena, M. Di Tullio, R. Rossignoli
We introduce a general bipartite-like representation and Schmidt decomposition of an arbitrary pure state of indistinguishable fermions, based on states of and fe…
One-body entanglement as a quantum resource in fermionic systems
N. Gigena, M. Di Tullio, R. Rossignoli
We show that one-body entanglement, which is a measure of the deviation of a pure fermionic state from a Slater determinant (SD) and is determined by the mixedness of the single-pa…
Fermionic entanglement in the Lipkin model
M. Di Tullio, R. Rossignoli, M. Cerezo +1
We examine the fermionic entanglement in the ground state of the fermionic Lipkin model and its relation with bipartite entanglement. It is first shown that the one-body entangleme…
Parallel-in-time optical simulation of history states
Dudbil Pabón, Lorena Rebón, Sebastián Bordakevich +5
We present an experimental optical implementation of a parallel-in-time discrete model of quantum evolution, based on the entanglement between the quantum system and a finite dimen…
Conditional states and entropy in qudit-qubit systems
M. Bilkis, N. Canosa, R. Rossignoli +1
We examine, in correlated mixed states of qudit-qubit systems, the set of all conditional qubit states that can be reached after local measurements at the qudit based on rank-1 pro…
Fermionic Entanglement in Superconducting Systems
M. Di Tullio, N. Gigena, R. Rossignoli
We examine distinct measures of fermionic entanglement in the exact ground state of a finite superconducting system. It is first shown that global measures such as the one-body ent…
Quantum Discord and entropic measures of quantum correlations: Optimization and behavior in finite spin chains
N. Canosa, M. Cerezo, N. Gigena +1
We discuss a generalization of the conditional entropy and one-way information deficit in quantum systems, based on general entropic forms. The formalism allows to consider simple…
Bipartite entanglement in fermion systems
N. Gigena, R. Rossignoli
We discuss the relation between fermion entanglement and bipartite entanglement. We first show that an exact correspondence between them arises when the states are constrained to h…
One-body information loss in fermion systems
N. Gigena, R. Rossignoli
We propose an entropic measure of non-classical correlations in general mixed states of fermion systems, based on the loss of information due to the unread measurement of the occup…
Conditional purity and quantum correlation measures in two qubit mixed states
L. Rebón, R. Rossignoli, J. J. M. Varga +4
We analyze and show experimental results of the conditional purity, the quantum discord and other related measures of quantum correlation in mixed two-qubit states constructed from…
System-time entanglement in a discrete time model
A. Boette, R. Rossignoli, N. Gigena +1
We present a model of discrete quantum evolution based on quantum correlations between the evolving system and a reference quantum clock system. A quantum circuit for the model is…
Entanglement in fermion systems
N. Gigena, R. Rossignoli
We analyze the problem of quantifying entanglement in pure and mixed states of fermionic systems with fixed number parity yet not necessarily fixed particle number. The "mode entan…
Generalized conditional entropy optimization for qudit-qubit states
N. Gigena, R. Rossignoli
We derive a general approximate solution to the problem of minimizing the conditional entropy of a qudit-qubit system resulting from a local projective measurement on the qubit, wh…
Generalized conditional entropy in bipartite quantum systems
N. Gigena, R. Rossignoli
We analyze, for a general concave entropic form, the associated conditional entropy of a quantum system A+B, obtained as a result of a local measurement on one of the systems (B).…