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- Vasileios Fragkos
- Department of Physics, Stockholm University 1 , SE-106 91 Stockholm, Sweden
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- Michael Kopp
- Department of Physics, Stockholm University 1 , SE-106 91 Stockholm, Sweden
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- Igor Pikovski
- Department of Physics, Stockholm University 1 , SE-106 91 Stockholm, Sweden
説明
<jats:p>Observable signatures of the quantum nature of gravity at low energies have recently emerged as a promising new research field. One prominent avenue is to test for gravitationally induced entanglement between two mesoscopic masses prepared in spatial superposition. Here, we analyze such proposals and what one can infer from them about the quantum nature of gravity as well as the electromagnetic analogues of such tests. We show that it is not possible to draw conclusions about mediators: even within relativistic physics, entanglement generation can equally be described in terms of mediators or in terms of non-local processes—relativity does not dictate a local channel. Such indirect tests, therefore, have limited ability to probe the nature of the process establishing the entanglement as their interpretation is inherently ambiguous. We also show that cosmological observations already demonstrate some aspects of quantization that these proposals aim to test. Nevertheless, the proposed experiments would probe how gravity is sourced by spatial superpositions of matter, an untested new regime of quantum physics.</jats:p>
収録刊行物
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- AVS Quantum Science
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AVS Quantum Science 4 (4), 2022-11-29
American Vacuum Society