Catapulting towards massive and large spatial quantum superposition
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2022-12-02 |
| Journal | Physical Review Research |
| Authors | Run Zhou, Ryan J. Marshman, Sougato Bose, Anupam Mazumdar |
| Institutions | Centre for Quantum Computation and Communication Technology, University of Groningen |
| Citations | 38 |
Abstract
Section titled āAbstractāA large spatial quantum superposition of size O(1-10)Ī¼m for mass mā¼10-17-10-14 kg is required to probe the foundations of quantum mechanics and test the classical and quantum nature of gravity via entanglement in a laboratory. In this paper, we will show that it is possible to accelerate the two spin states of a macroscopic nanocrystal sourced by the inhomogeneous nonlinear magnetic field in a Stern-Gerlach-type setup. We will assume that the electronic spin can be embedded at the center of the nanocrystal, such as the nitrogen-vacancy (NV) center of diamond. Our analysis will be generic to any dopant or any material. We will show that we can create a desired superposition size within 1-2 s by catapulting the trajectories of the two spin states with a modest magnetic field gradient and then recombine the trajectories for a coherent interference. We will show the demanding nature of the precision required in the magnetic field to recover a 99% spin coherence confidence level at the moment of interference.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2014 - Quantum Gravity
- 2014 - XVIIth International Congress on Mathematical Physics