Do qubits dream of entangled sheep? Quantum measurement without classical output
Fuente:
arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2020
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| _version_ | 1866911877427101696 |
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| author | Lupu-Gladstein, Noah Brodutch, Aharon Ferretti, Hugo Tham, Weng-Kian Pang, Arthur Ou Teen Bonsma-Fisher, Kent Steinberg, Aephraim M. |
| author_facet | Lupu-Gladstein, Noah Brodutch, Aharon Ferretti, Hugo Tham, Weng-Kian Pang, Arthur Ou Teen Bonsma-Fisher, Kent Steinberg, Aephraim M. |
| contents | Quantum mechanics is usually formulated with an implicit assumption that agents who can observe and interact with the world are external to it and have a classical memory. However, there is no accepted way to define the quantum-classical cut and no a priori reason to rule out fully quantum agents with coherent quantum memories. In this work, we introduce an entirely quantum notion of measurement, called a sensation, to account for quantum agents that experience the world through quantum sensors. Sensations eschew probabilities and instead describe a deterministic flow of quantum information. We quantify the information gain and disturbance of a sensation using concepts from quantum information theory and find that sensations always disturb at least as much as they inform. Viewing measurements as sensations could lead to a new understanding of quantum theory in general and to new results in the context of quantum networks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2008_10617 |
| institution | arXiv |
| publishDate | 2020 |
| record_format | arxiv |
| spellingShingle | Do qubits dream of entangled sheep? Quantum measurement without classical output Lupu-Gladstein, Noah Brodutch, Aharon Ferretti, Hugo Tham, Weng-Kian Pang, Arthur Ou Teen Bonsma-Fisher, Kent Steinberg, Aephraim M. Quantum Physics Quantum mechanics is usually formulated with an implicit assumption that agents who can observe and interact with the world are external to it and have a classical memory. However, there is no accepted way to define the quantum-classical cut and no a priori reason to rule out fully quantum agents with coherent quantum memories. In this work, we introduce an entirely quantum notion of measurement, called a sensation, to account for quantum agents that experience the world through quantum sensors. Sensations eschew probabilities and instead describe a deterministic flow of quantum information. We quantify the information gain and disturbance of a sensation using concepts from quantum information theory and find that sensations always disturb at least as much as they inform. Viewing measurements as sensations could lead to a new understanding of quantum theory in general and to new results in the context of quantum networks. |
| title | Do qubits dream of entangled sheep? Quantum measurement without classical output |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2008.10617 |