dorsal/arxiv
View SchemaMagnetic levitation and spatial superposition of a nanodiamond with a current-carrying chip
| Authors | Qian Xiang, Shafaq Gulzar Elahi, Andrew Geraci, Sougato Bose, Anupam Mazumdar |
|---|---|
| Categories | |
| ArXiv ID | 2601.06608vv1 |
| URL | https://arxiv.org/abs/2601.06608 |
| License | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
Abstract
We propose a current-carrying-chip scheme for generating spatial quantum superpositions using a levitating nanodiamond with a built-in nitrogen-vacancy (NV) centre defect. Our setup is quite versatile and we aim to create the superposition for a mass range of $10^{-19}~{\rm kg}< m< 10^{-15}~{\rm kg}$ and a superposition size ${\cal O}(10) {\rm \mu m} < \Delta x < {\cal O}(1){\rm nm}$, respectively, in $t\leq 0.1$s, depending on the position we launch from the center of the diamagnetic trap. We provide an in-depth analysis of two parallel chips that can create levitation and spatial superposition along the $x$-axis, while producing a very tight trap in the $y$ direction, and the direction of gravity, i.e., the $z$ direction. Numerical simulations demonstrate that our setup can create a one-dimensional spatial superposition state along the x-axis. Throughout this process, the particle is stably levitated in the z-direction, and its motion is effectively confined in the y-direction for a Gaussian initial condition. This setup presents a viable platform for a diamagnetically levitated nanoparticle for a table-top experiment exploring the possibility of creating a macroscopic Schr\"odinger Cat state to test the quantum gravity induced entanglement of masses (QGEM) protocol.
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"abstract": "We propose a current-carrying-chip scheme for generating spatial quantum superpositions using a levitating nanodiamond with a built-in nitrogen-vacancy (NV) centre defect. Our setup is quite versatile and we aim to create the superposition for a mass range of $10^{-19}~{\\rm kg}\u003c m\u003c 10^{-15}~{\\rm kg}$ and a superposition size ${\\cal O}(10) {\\rm \\mu m} \u003c \\Delta x \u003c {\\cal O}(1){\\rm nm}$, respectively, in $t\\leq 0.1$s, depending on the position we launch from the center of the diamagnetic trap. We provide an in-depth analysis of two parallel chips that can create levitation and spatial superposition along the $x$-axis, while producing a very tight trap in the $y$ direction, and the direction of gravity, i.e., the $z$ direction. Numerical simulations demonstrate that our setup can create a one-dimensional spatial superposition state along the x-axis. Throughout this process, the particle is stably levitated in the z-direction, and its motion is effectively confined in the y-direction for a Gaussian initial condition. This setup presents a viable platform for a diamagnetically levitated nanoparticle for a table-top experiment exploring the possibility of creating a macroscopic Schr\\\"odinger Cat state to test the quantum gravity induced entanglement of masses (QGEM) protocol.",
"arxiv_id": "2601.06608",
"authors": [
"Qian Xiang",
"Shafaq Gulzar Elahi",
"Andrew Geraci",
"Sougato Bose",
"Anupam Mazumdar"
],
"categories": [
"quant-ph"
],
"license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
"title": "Magnetic levitation and spatial superposition of a nanodiamond with a current-carrying chip",
"url": "https://arxiv.org/abs/2601.06608",
"version": "v1"
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