dorsal/arxiv
View SchemaMeasurement, Trace, Information Erasure and Entropy
| Authors | Qing-Yu Cai |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0307026 |
| URL | https://arxiv.org/abs/quant-ph/0307026 |
Abstract
We show that both information erasure process and trace process can be realized by projective measurement. And a partial trace operation consists to a projective measurement on a subsystem. We show that a nonunitary operation will destroy the wave-behavior of a particle. We give a quantum manifestation of Maxwell's demon and give a quantum manifestation of the second law of therodynamics. We show that, considering the law of memontum-energy conversation, the evolution of a closed system should be unitary and the von Neumann entropy of the closed quantum system should be least.
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"abstract": "We show that both information erasure process and trace process can be\nrealized by projective measurement. And a partial trace operation consists to a\nprojective measurement on a subsystem. We show that a nonunitary operation will\ndestroy the wave-behavior of a particle. We give a quantum manifestation of\nMaxwell\u0027s demon and give a quantum manifestation of the second law of\ntherodynamics. We show that, considering the law of memontum-energy\nconversation, the evolution of a closed system should be unitary and the von\nNeumann entropy of the closed quantum system should be least.",
"arxiv_id": "quant-ph/0307026",
"authors": [
"Qing-Yu Cai"
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"categories": [
"quant-ph"
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"title": "Measurement, Trace, Information Erasure and Entropy",
"url": "https://arxiv.org/abs/quant-ph/0307026"
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