Accelerated State Expansion of a Nanoparticle in a Dark Inverted Potential
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866915347838271488 |
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| author | Tomassi, Gregoire F. M. Veldhuizen, Daniel Melo, Bruno Candoli, Davide Riera-Campeny, Andreu Romero-Isart, Oriol Meyer, Nadine Quidant, Romain |
| author_facet | Tomassi, Gregoire F. M. Veldhuizen, Daniel Melo, Bruno Candoli, Davide Riera-Campeny, Andreu Romero-Isart, Oriol Meyer, Nadine Quidant, Romain |
| contents | While the wave packet of a massive particle grows linearly under free dynamics, it grows exponentially in an inverted harmonic potential, offering a pathway to rapidly increase quantum fluctuations to macroscopic dimensions. In this work, we experimentally demonstrate this principle by expanding the center-of-mass thermal state of a 125nm silica nanoparticle to a position uncertainty of 43.4nm within 260 $μ$s. This expansion, achieved using an inverted dark potential to minimize decoherence from photon recoil, represents a 952-fold increase, reaching a scale comparable to the nanoparticle's physical size. This work represents a key advancement toward preparing macroscopic quantum superpositions at unprecedented mass and length scales. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_20707 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Accelerated State Expansion of a Nanoparticle in a Dark Inverted Potential Tomassi, Gregoire F. M. Veldhuizen, Daniel Melo, Bruno Candoli, Davide Riera-Campeny, Andreu Romero-Isart, Oriol Meyer, Nadine Quidant, Romain Quantum Physics Atomic Physics While the wave packet of a massive particle grows linearly under free dynamics, it grows exponentially in an inverted harmonic potential, offering a pathway to rapidly increase quantum fluctuations to macroscopic dimensions. In this work, we experimentally demonstrate this principle by expanding the center-of-mass thermal state of a 125nm silica nanoparticle to a position uncertainty of 43.4nm within 260 $μ$s. This expansion, achieved using an inverted dark potential to minimize decoherence from photon recoil, represents a 952-fold increase, reaching a scale comparable to the nanoparticle's physical size. This work represents a key advancement toward preparing macroscopic quantum superpositions at unprecedented mass and length scales. |
| title | Accelerated State Expansion of a Nanoparticle in a Dark Inverted Potential |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2503.20707 |