Quantum Features of Gravcats

• Saeed Haddadi (School of Particles and Accelerators - IPM)

In this talk, I will present a series of studies where I explore the quantum properties of gravitational cats (so-called gravcats) modeled by interacting qubits under a variety of physical conditions. My focus is on understanding how gravcats can preserve quantum correlations in the presence of thermal noise, gravitational interactions, and different environmental decoherence mechanisms. I then extend this investigation to more general environments, including classical stochastic, correlated dephasing channels, and power-law noise, as well as weak measurement interventions. These results show that gravcats serve as robust resources for maintaining quantum correlations, particularly in non-Markovian regimes where information backflow can delay decoherence. Altogether, these works contribute new insights into how gravcats can function as reliable carriers of quantum information and highlight the nuanced interplay between gravity, noise, and quantumness in open quantum systems.