References & Citations
Quantum Physics
Title: Catapulting towards massive and large spatial quantum superposition
(Submitted on 8 Jun 2022 (v1), last revised 11 Oct 2022 (this version, v2))
Abstract: Large spatial quantum superposition of size ${\cal O}(1-10)~{\rm \mu \text{m}}$ for mass $m \sim 10^{-17}-10^{-14}~\text{kg}$ is required to probe the foundations of quantum mechanics and testing 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 nano-crystal sourced by the inhomogeneous nonlinear magnetic field in the Stern-Gerlach type setup. We will assume that the electronic spin can be embedded at the centre of the nano-crystal, such as the nitrogen-vacancy (NV) centre 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 $1-2$ seconds 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 $99\%$ spin coherence confidence level at the moment of interference.
Submission history
From: Run Zhou [view email][v1] Wed, 8 Jun 2022 18:00:12 GMT (6389kb,D)
[v2] Tue, 11 Oct 2022 16:03:25 GMT (6068kb,D)
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