6 papers
Mesoscopic mechanical superpositions by gluing individual quantum systems
Thiago Guerreiro
We propose a protocol for preparing mechanical Schrödinger kittens -- mesoscopic quantum superpositions of coherent motional states of an optically levitated nanoparticle -- by ad…
Response of a classical mesoscopic oscillator to a two-level quantum system
Felipe Sobrero, Luca Abrahão, Thiago Guerreiro +1
We investigate the dynamics of a classical mechanical oscillator coupled to the simplest quantum system, a single qubit. Using the Feynman-Vernon influence functional formalism, we…
All-optical saddle trap as a platform for mesoscopic quantum experiments
Pedro V. Paraguassú, Luca Abrahão, Daniel Tandeitnik +3
We investigate the quantum dynamics of a levitated nanoparticle in a structured light rotating saddle-like optical potential consisting of a superposition of Gaussian and Laguerre-…
On the quantum nature of strong gravity
Felipe Sobrero, Luca Abrahão, Thiago Guerreiro
Belenchia et al. [Phys. Rev. D 98, 126009 (2018)] have analyzed a gedankenexperiment where two observers, Alice and Bob, attempt to communicate via superluminal signals using a sup…
Apparent violations of the second law in the quantum-classical dynamics of interacting levitated nanoparticles
Pedro V. Paraguassú, Thiago Guerreiro
Random exchanges of energy arise naturally in stochastic systems. As a consequence, apparent violations of the second law of thermodynamics can occur, as it holds true on average.…
Quantum-induced Stochastic Optomechanical Dynamics
Pedro V. Paraguassú, Luca Abrahão, Thiago Guerreiro
We study the effective stochastic dynamics of a semiclassical probe induced by linear optomechanical interactions with a quantum oscillator. Quantum fluctuations lead to state-depe…