153 citations · 463 across the 23 of their papers we have counts for
23 papers
The quantum optics of gravitational waves
Luca Abrahao, Francesco Coradeschi, Antonia Micol Frassino +3
By utilizing quantum optics techniques, we examine the characteristics of a quantum gravitational wave (GW) signature at interferometers. In particular, we study the problem by ana…
Nonlinearities in Black Hole Ringdowns and the Quantization of Gravity
Thiago Guerreiro
Einstein's theory of gravity admits a low energy effective quantum field description from which predictions beyond classical general relativity can be drawn. As gravitational wave…
Trapping microparticles in a structured dark focus
F. Almeida, I. Sousa, O. Kremer +5
We experimentally demonstrate stable trapping and controlled manipulation of silica microspheres in a structured optical beam consisting of a dark focus surrounded by light in all…
Evolving Quantum Circuits
Daniel Tandeitnik, Thiago Guerreiro
We develop genetic algorithms for searching quantum circuits, in particular stabilizer quantum error correction codes. Quantum codes equivalent to notable examples such as the 5-qu…
QuGIT: a numerical toolbox for Gaussian quantum states
Igor Brandão, Daniel Tandeitnik, Thiago Guerreiro
Simulating quantum states on a classical computer is hard, typically requiring prohibitive resources in terms of memory and computational power. Efficient simulation, however, can…
Quantum signatures in nonlinear gravitational waves
Thiago Guerreiro, Francesco Coradeschi, Antonia Micol Frassino +2
The effective quantum field theory description of gravity, despite its non-renormalizability, allows for predictions beyond classical general relativity. As we enter the age of gra…
Can we detect the quantum nature of weak gravitational fields?
Francesco Coradeschi, Antonia Micol Frassino, Thiago Guerreiro +2
A theoretical framework for the quantization of gravity has been an elusive Holy Grail since the birth of quantum theory and general relativity. While generations of scientists hav…
Molecular machines for quantum error correction
Thiago Guerreiro
Inspired by biological molecular machines we explore the idea of an active quantum robot whose purpose is delaying decoherence. A conceptual model capable of partially protecting a…
Coherent Scattering-mediated correlations between levitated nanospheres
Igor Brandão, Daniel Tandeitnik, Thiago Guerreiro
We explore entanglement generation between multiple optically levitated nanospheres interacting with a common optical cavity via the Coherent Scattering optomechanical interaction.…
Path integrals and nonlinear optical tweezers
Bruno Suassuna, Bruno Melo, Thiago Guerreiro
We use path integrals to calculate perturbative corrections to the correlation function of a particle under the action of nonlinear optical tweezers, both in the overdamped and und…
Quantum Molecular Robots
Thiago Guerreiro
Living organisms exploit complex molecular machines to execute crucial functions in chaotic environments. Inspired by nature's molecular setups we explore the idea of a quantum mec…
Entanglement Dynamics in Dispersive Optomechanics: Non-Classicality and Revival
Igor Brandão, Bruno Suassuna, Bruno Melo +1
We study entanglement dynamics in dispersive optomechanical systems consisting of two optical modes and a mechanical oscillator inside an optical cavity. The two optical modes inte…
Relaxing constraints on data acquisition and position detection for trap stiffness calibration in optical tweezers
Bruno Melo, Felipe Almeida, Guilherme Temporão +1
Optical tweezers find applications in various fields, ranging from biology to physics. One of the fundamental steps necessary to perform quantitative measurements using trapped par…
Directed graphs and interferometry
Bruno Melo, Igor Brandão, Carlos Tomei +1
The observed output of an interferometer is the result of interference among the parts of the input light beam traveling along each possible optical path. In complex systems, writi…
Quantum Effects in Gravity Waves
Thiago Guerreiro
We discuss the quantum mechanical description of a gravitational wave interacting with a cavity electromagnetic field. Quantum fluctuations of the gravitational vacuum induce squee…
Quantifying photonic high-dimensional entanglement
Anthony Martin, Thiago Guerreiro, Alexey Tiranov +5
High-dimensional entanglement offers promising perspectives in quantum information science. In practice, however, the main challenge is to devise efficient methods to characterize…
Demonstration of EPR steering using single-photon path entanglement and displacement-based detection
T. Guerreiro, F. Monteiro, A. Martin +15
We demonstrate the violation of an EPR steering inequality developed for single photon path entanglement with displacement-based detection. We use a high-rate source of heralded si…
Revealing Genuine Optical-Path Entanglement
F. Monteiro, V. Caprara Vivoli, T. Guerreiro +5
How can one detect entanglement between multiple optical paths sharing a single photon? We address this question by proposing a scalable protocol, which only uses local measurement…
Intrinsically stable light source at telecom wavelengths
Fernando Monteiro, Thiago Guerreiro, Bruno Sanguinetti +1
We present a highly stable light source at telecom wavelengths, based on a short erbium doped fiber. The high stability arises from the high inversion of the Er3+ion population. Th…
Measuring absolute spectral radiance using an Erbium Doped Fibre Amplifier
Bruno Sanguinetti, Thiago Guerreiro, Fernando Monteiro +2
We describe a method to measure the spectral radiance of a source in an absolute way without the need of a reference. Here we give the necessary detail to allow for the device to b…
MHz rate and efficient synchronous heralding of single photons at telecom wavelengths
Enrico Pomarico, Bruno Sanguinetti, Thiago Guerreiro +2
We report on the realization of a synchronous source of heralded single photons at telecom wavelengths with MHz heralding rates and high heralding efficiency. This source is based…
Single-photon space-like antibunching
Thiago Guerreiro, Bruno Sanguinetti, Hugo Zbinden +2
We use heralded single photons to perform an antibunching experiment in which the clicks at the detectors are spacelike separated events. The idea of such experiment dates back to…
An Energy Puzzle in Quantum Collapse
Thiago Guerreiro, Fernando Monteiro
Since its discovery, quantum theory has proven to be one of the most precise theories ever made. Measurement processes, however, do not seem to be governed by the unitary law of qu…