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27 papers · 2 filters
High extraction efficiency source of photon pairs based on a quantum dot embedded in a broadband micropillar cavity
Laia Ginés, Magdalena Moczała-Dusanowska, David Dlaka +9
The generation of photon pairs in single quantum dots is based on a process that is, in its nature, deterministic. However, an efficient extraction of these photon pairs from a hig…
Optimal Fidelity Witnesses for Gravitational Entanglement
Thomas Guff, Nicolas Boulle, Igor Pikovski
Optomechanical systems open new possibilities in fundamental research at the interface between quantum information and gravity. Recently, an ambitious experimental proposal was sug…
Extensions of the Mandelstam-Tamm quantum speed limit to systems in mixed states
Niklas Hörnedal, Dan Allan, Ole Sönnerborn
The Mandelstam-Tamm quantum speed limit puts a bound on how fast a closed system in a pure state can evolve. In this paper, we derive several extensions of this quantum speed limit…
Operational models of temperature superpositions
Carolyn E. Wood, Harshit Verma, Fabio Costa +1
A quantum system and a thermal bath can reach thermal equilibrium through an interaction, whereupon the system acquires the same temperature as the bath. But how does a delocalised…
Enhancing self-discharging process with disordered quantum batteries
Mohammad B. Arjmandi, Hamidreza Mohammadi, Alan C. Santos
One of the most important devices emerging from quantum technology are quantum batteries. However, self-discharging, the process of charge wasting of quantum batteries due to decoh…
Many-body probes for quantum features of spacetime
Hadrien Chevalier, Hyukjoon Kwon, Kiran E. Khosla +2
Many theories of quantum gravity can be understood as imposing a minimum length scale the signatures of which can potentially be seen in precise table top experiments. In this work…