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http://hdl.handle.net/2289/8153| Title: | Massive spatial qubits: Testing macroscopic nonclassicality and Casimir entanglement |
| Authors: | Yi, Bin Sinha, Urbasi Home, Dipankar Mazumdar, Anupam Bose, Sougato |
| Keywords: | nonlocality quantum correlations in quantum information quantum entanglement quantum foundations quantum measurements quantum to classical transaction |
| Issue Date: | 22-Sep-2023 |
| Publisher: | American Physical Society |
| Citation: | Physical Review Research, 2023, Vol.5, Article No. 033202 |
| Abstract: | An open challenge in physics is to expand the frontiers of the validity of quantum mechanics by evidencing nonclassicality of the center of mass state of a macroscopic object. Yet another equally important task is to evidence the essential nonclassicality of the interactions which act between macroscopic objects. Here we introduce a new tool to meet these challenges: massive spatial qubits. In particular, we show that if two distinct localized states of a mass are used as the |0⟩ and |1⟩ states of a qubit, then we can measure this encoded spatial qubit with a high fidelity in the σx,σy, and σz bases simply by measuring its position after different duration of free evolution. This technique can be used reveal the irreducible nonclassicality of the spin and center of mass entangled state of a nanocrystal implying macrocontextuality. Further, in the context of Casimir interaction, this offers a powerful method to create and certify non-Gaussian entanglement between two neutral nano-objects. The entanglement such produced provides an empirical demonstration of the Casimir interaction being inherently quantum. |
| Description: | Open Access |
| URI: | http://hdl.handle.net/2289/8153 |
| ISSN: | 2643-1564 |
| Alternative Location: | https://arxiv.org/abs/2106.11906 https://doi.org/10.1103/PhysRevResearch.5.033202 https://ui.adsabs.harvard.edu/abs/2021arXiv210611906Y/abstract https://inspirehep.net/literature/2666456 |
| Copyright: | 2023 American Physical Society |
| Appears in Collections: | Research Papers (LAMP) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2023_PhysRevResearch.5.033202.pdf | Open Access | 756.38 kB | Adobe PDF | View/Open |
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