Name: [QG-AA] "On the role of gravity in table-top quantum experiments" and "Quantum Nature of Gravity in the Lab: Assumptions and Schematics of a Proposal"
Start: 2021-10-22T17:00:00+02:00
End: 2021-10-22T19:00:00+02:00
Location: No location set

Description

Markus Aspelmeyer:

On the role of gravity in table-top quantum experiments

Abstract:

No experiment today provides evidence that gravity requires a quantum description. Two type of table-top searches have been suggested to provide answers: experiments that test low-energy consequences of quantum theories of gravity, and experiments that directly probe the phenomenology of quantum states of the metric generated by a quantum source mass (in the spirit of a quantum-Cavendish experiment). The latter requires to bridge the gap between two different realms: precision measurements of gravity with microscopic source masses (currently 10^21 atoms) and quantum state preparations of massive solid state objects (currently 10^9 atoms). I will review the current status in the lab and the challenges to be overcome for future experiments.

Sougato Bose:

Quantum Nature of Gravity in the Lab: Assumptions and Schematics of a Proposal

Abstract: There is no empirical evidence yet as to “whether” gravity has a quantum mechanical origin. Motivated by this, I will present a potentially feasible idea for testing the quantum origin of the Newtonian interaction based on the simple fact that two objects cannot be entangled without a quantum mediator. I will clarify the assumptions underpinning the above proposal such as a reasonable definition of “classicality”, as well as the "locality" of physical interactions. Further, I will show that despite its weakness, gravity can detectably entangle two adjacent micron sized test masses held in quantum superpositions even when they are placed far apart enough to keep Casimir-Polder forces at bay. A prescription for witnessing this entanglement through spin correlations is also provided. Further, I will state a few ideas about screening EM forces and Inertial noise reduction.

https://uni-jena-de.zoom.us/j/69556470634

Meeting-ID: 695 5647 0634
Kenncode: QG-AA

[QG-AA] "On the role of gravity in table-top quantum experiments" and "Quantum Nature of Gravity in the Lab: Assumptions and Schematics of a Proposal"

by Markus Aspelmeyer (University of Vienna), Sougato Bose (University College London)