Foundations of quantum mechanics and their impact on contemporary society
(2018)
Journal Article
All Outputs (102)
Quantum coherence fluctuation relations (2018)
Journal Article
We investigate manipulations of pure quantum states under incoherent or strictly incoherent operations assisted by a coherence battery, that is, a storage device whose degree of coherence is allowed to fluctuate in the process. This leads to the deri... Read More about Quantum coherence fluctuation relations.
Converting multilevel nonclassicality into genuine multipartite entanglement (2018)
Journal Article
Characterizing genuine quantum resources and determining operational rules for their manipulation are crucial steps to appraise possibilities and limitations of quantum technologies. Two such key resources are nonclassicality, manifested as quantum s... Read More about Converting multilevel nonclassicality into genuine multipartite entanglement.
Gaussian entanglement revisited (2018)
Journal Article
We present a novel approach to the problem of separability versus entanglement in Gaussian quantum states of bosonic continuous variable systems, as well as a collection of closely related results. We derive a simplified necessary and sufficient sepa... Read More about Gaussian entanglement revisited.
Testing the validity of the ‘local’ and ‘global’ GKLS master equations on an exactly solvable model (2017)
Journal Article
When deriving a master equation for a multipartite weakly-interacting open quantum systems, dissipation is often addressed locally on each component, i.e. ignoring the coherent couplings, which are later added ‘by hand’. Although simple, the resultin... Read More about Testing the validity of the ‘local’ and ‘global’ GKLS master equations on an exactly solvable model.
Colloquium: quantum coherence as a resource (2017)
Journal Article
The coherent superposition of states, in combination with the quantization of observables, represents one of the most fundamental features that mark the departure of quantum mechanics from the classical realm. Quantum coherence in many-body systems e... Read More about Colloquium: quantum coherence as a resource.
Investigating Einstein-Podolsky-Rosen steering of continuous-variable bipartite states by non-Gaussian pseudospin measurements (2017)
Journal Article
Einstein-Podolsky-Rosen (EPR) steering is an asymmetric form of correlations which is intermediate between quantum entanglement and Bell nonlocality, and can be exploited as a resource for quantum communication with one untrusted party. In particular... Read More about Investigating Einstein-Podolsky-Rosen steering of continuous-variable bipartite states by non-Gaussian pseudospin measurements.
Optimal continuous variable quantum teleportation with limited resources (2017)
Journal Article
Given a certain amount of entanglement available as a resource, what is the most efficient way to accomplish a quantum task? We address this question in the relevant case of continuous variable quantum teleportation protocols implemented using two-mo... Read More about Optimal continuous variable quantum teleportation with limited resources.
Optimal secure quantum teleportation of coherent states of light (2017)
Conference Proceeding
We investigate quantum teleportation of ensembles of coherent states of light with a Gaussian distributed displacement in phase space. Recently, the following general question has been addressed in [P. Liuzzo-Scorpo et al., arXiv:1705.03017]: Given a... Read More about Optimal secure quantum teleportation of coherent states of light.
From log-determinant inequalities to Gaussian entanglement via recoverability theory (2017)
Journal Article
Many determinantal inequalities for positive definite block matrices are consequences of general entropy inequalities, specialised to Gaussian distributed vectors with prescribed covariances. In particular, strong subadditivity (SSA) yields ln det VA... Read More about From log-determinant inequalities to Gaussian entanglement via recoverability theory.
Connecting measurement invasiveness to optimal metrological scenarios (2017)
Journal Article
The connection between the Leggett-Garg inequality and optimal scenarios from the point of view of quantum metrology is investigated for perfect and noisy general dichotomic measurements. In this context, we show that the Fisher information can be ex... Read More about Connecting measurement invasiveness to optimal metrological scenarios.
Role of non-Markovianity and backflow of information in the speed of quantum evolution (2017)
Journal Article
We consider a two-level open quantum system undergoing pure dephasing, dissipative, or multiply decohering dynamics and show that whenever the dynamics is non-Markovian, the initial speed of evolution is a monotonic function of the relevant physical... Read More about Role of non-Markovianity and backflow of information in the speed of quantum evolution.
Demonstration of monogamy relations for Einstein-Podolsky-Rosen steering in Gaussian cluster states (2017)
Journal Article
Understanding how quantum resources can be quantified and distributed over many parties has profound applications in quantum communication. As one of the most intriguing features of quantum mechanics, Einstein-Podolsky-Rosen (EPR) steering is a usefu... Read More about Demonstration of monogamy relations for Einstein-Podolsky-Rosen steering in Gaussian cluster states.
Estimating phase with a random generator: strategies and resources in multiparameter quantum metrology (2017)
Journal Article
Quantum metrology aims to exploit quantum phenomena to overcome classical limitations in the estimation of relevant parameters. We consider a probe undergoing a phase shift ? whose generator is randomly sampled according to a distribution with unknow... Read More about Estimating phase with a random generator: strategies and resources in multiparameter quantum metrology.
Versatile Gaussian probes for squeezing estimation (2017)
Journal Article
We consider an instance of “black-box” quantum metrology in the Gaussian framework, where we aim to estimate the amount of squeezing applied on an input probe, without previous knowledge on the phase of the applied squeezing. By taking the quantum Fi... Read More about Versatile Gaussian probes for squeezing estimation.
There is more to quantum interferometry than entanglement (2017)
Journal Article
Entanglement has long stood as one of the characteristic features of quantum mechanics, yet recent developments have emphasized the importance of quantumness beyond entanglement for quantum foundations and technologies. We demonstrate that entangleme... Read More about There is more to quantum interferometry than entanglement.
Non-Markovianity hierarchy of Gaussian processes and quantum amplification (2017)
Journal Article
We investigate the dynamics of Gaussian states of continuous variable systems under Gaussianity-preserving channels. We introduce a hierarchy of such evolutions encompassing Markovian and weakly and strongly non-Markovian processes and provide simple... Read More about Non-Markovianity hierarchy of Gaussian processes and quantum amplification.
Genuine multipartite nonlocality of permutationally invariant Gaussian states (2017)
Journal Article
We investigate genuine multipartite nonlocality of pure permutationally invariant multimode Gaussian states of continuous variable systems, as detected by the violation of Svetlichny inequality. We identify the phase space settings leading to the lar... Read More about Genuine multipartite nonlocality of permutationally invariant Gaussian states.
Probing the diamagnetic term in light–matter interaction (2017)
Journal Article
We address the quantum estimation of the diamagnetic, or A 2, term in an effective model of light–matter interaction featuring two coupled oscillators. First, we calculate the quantum Fisher information of the diamagnetic parameter in the interacting... Read More about Probing the diamagnetic term in light–matter interaction.
Unconditional security of entanglement-based continuous-variable quantum secret sharing (2017)
Journal Article
The need for secrecy and security is essential in communication. Secret sharing is a conventional protocol to distribute a secret message to a group of parties, who cannot access it individually but need to cooperate in order to decode it. While seve... Read More about Unconditional security of entanglement-based continuous-variable quantum secret sharing.