All Outputs (21)

Quantum estimation of coupling strengths in driven-dissipative optomechanics (2021)
Journal Article

We exploit local quantum estimation theory to investigate the measurement of linear (g1) and quadratic (g2) coupling strengths in a driven-dissipative optomechanical system in the red-sideband regime. We consider model parameters inspired by recent e... Read More about Quantum estimation of coupling strengths in driven-dissipative optomechanics.

Single quantum emitter Dicke enhancement (2021)
Journal Article

Coupling N identical emitters to the same field mode is well-established method to enhance light matter interaction. However, the resulting √ N-boost of the coupling strength comes at the cost of a "linearized" (effectively semi-classical) dynamics.... Read More about Single quantum emitter Dicke enhancement.

General Expressions for the Quantum Fisher Information Matrix with Applications to Discrete Quantum Imaging (2021)
Journal Article

The quantum Fisher information matrix is a central object in multiparameter quantum estimation theory. It is usually challenging to obtain analytical expressions for it because most calculation methods rely on the diagonalization of the density matri... Read More about General Expressions for the Quantum Fisher Information Matrix with Applications to Discrete Quantum Imaging.

Non-Orthogonal Bases for Quantum Metrology (2019)
Journal Article

Many quantum statistical models are most conveniently formulated in terms of non-orthonormal bases. This is the case, for example, when mixtures and superpositions of coherent states are involved. In these instances, we show that the analytical evalu... Read More about Non-Orthogonal Bases for Quantum Metrology.

Towards superresolution surface metrology: quantum estimation of angular and axial separations (2019)
Journal Article

We investigate the localization of two incoherent point sources with arbitrary angular and axial separations in the paraxial approximation. By using quantum metrology techniques, we show that a simultaneous estimation of the two separations is achiev... Read More about Towards superresolution surface metrology: quantum estimation of angular and axial separations.

Generic emergence of objectivity of observables in infinite dimensions (2018)
Journal Article

Quantum Darwinism posits that information becomes objective whenever multiple observers indirectly probe a quantum system by each measuring a fraction of the environment. It was recently shown that objectivity of observables emerges generically from... Read More about Generic emergence of objectivity of observables in infinite dimensions.

Exploring corrections to the optomechanical Hamiltonian (2018)
Journal Article

We compare two approaches for deriving corrections to the “linear model” of cavity optomechanics, in order to describe effects that are beyond first order in the radiation pressure coupling. In the regime where the mechanical frequency is much lower... Read More about Exploring corrections to the optomechanical Hamiltonian.

Near-field strong coupling of single quantum dots (2018)
Journal Article

Strong coupling and resultant mixing of light and matter states is an important asset for future quantum technologies. Here we demonstrate deterministic room-temperature strong coupling of a mesoscopic colloidal quantum dot to a plasmonic nano resona... Read More about Near-field strong coupling of single quantum dots.

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.

Quantifying genuine multipartite correlations and their pattern complexity (2017)
Journal Article

We propose an information-theoretic framework to quantify multipartite correlations in classical and quantum systems, answering questions such as: what is the amount of seven-partite correlations in a given state of ten particles? We identify measure... Read More about Quantifying genuine multipartite correlations and their pattern complexity.

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.

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.

Experimental realization of a thermal squeezed state of levitated optomechanics (2016)
Journal Article

We experimentally squeeze the thermal motional state of an optically levitated nanosphere by fast switching between two trapping frequencies. The measured phase-space distribution of the center of mass of our particle shows the typical shape of a squ... Read More about Experimental realization of a thermal squeezed state of levitated optomechanics.

Quantum state reconstruction of an oscillator network in an optomechanical setting (2016)
Journal Article

We introduce a scheme to reconstruct an arbitrary quantum state of a mechanical oscillator network. We assume that a single element of the network is coupled to a cavity field via a linearized optomechanical interaction, whose time dependence is cont... Read More about Quantum state reconstruction of an oscillator network in an optomechanical setting.

Bound states and entanglement generation in waveguide quantum electrodynamics (2016)
Journal Article

We investigate the behavior of two quantum emitters (two-level atoms) embedded in a linear waveguide, in a quasi-one-dimensional configuration. Since the atoms can emit, absorb and reflect radiation, the pair can spontaneously relax towards an entang... Read More about Bound states and entanglement generation in waveguide quantum electrodynamics.

Non-Markovianity of a quantum emitter in front of a mirror (2014)
Journal Article

We consider a quantum emitter (“atom”) radiating in a one-dimensional photonic waveguide in the presence of a single mirror, resulting in a delay differential equation for the atomic amplitude. We carry out a systematic analysis of the non-Markovian... Read More about Non-Markovianity of a quantum emitter in front of a mirror.

Quantum non-Gaussianity witnesses in phase space (2014)
Journal Article

Quantum discord determines the interferometric power of quantum states (2014)
Journal Article

Quantum metrology exploits quantum mechanical laws to improve the precision in estimating technologically relevant parameters such as phase, frequency, or magnetic fields. Probe states are usually tailored to the particular dynamics whose parameters... Read More about Quantum discord determines the interferometric power of quantum states.

Coherently opening a high-Q cavity (2014)
Journal Article

We propose a general framework to effectively “open” a high-Q resonator, that is, to release the quantum state initially prepared in it in the form of a traveling electromagnetic wave. This is achieved by employing a mediating mode that scatters cohe... Read More about Coherently opening a high-Q cavity.