dorsal/arxiv
View SchemaInteraction with a pre and post selected environment and recoherence
| Authors | B. Reznik |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9501023 |
| URL | https://arxiv.org/abs/quant-ph/9501023 |
Abstract
The interaction of an open system $\s$ with a pre- and post-selected environment is studied. In general, under such circumstances $\s$ can not be described in terms of a density matrix, {\it even when $\s$ in not post-selected}. However, a simple description in terms of a two-state (TS) is always available. The two-state of $\s$ evolves in time from an initially `pure' TS to a `mixed' TS and back to a final `pure' TS. This generic process is governed by a modified Liouville equation, which is derived. For a sub-class of observables, which can still be described by an ordinary density matrix, this evolution generates recoherence to a final pure state. In some cases post-selection can even suppress any decoherence.
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"abstract": "The interaction of an open system $\\s$ with a pre- and post-selected\nenvironment is studied. In general, under such circumstances $\\s$ can not be\ndescribed in terms of a density matrix, {\\it even when $\\s$ in not\npost-selected}. However, a simple description in terms of a two-state (TS) is\nalways available. The two-state of $\\s$ evolves in time from an initially\n`pure\u0027 TS to a `mixed\u0027 TS and back to a final `pure\u0027 TS. This generic process\nis governed by a modified Liouville equation, which is derived. For a sub-class\nof observables, which can still be described by an ordinary density matrix,\nthis evolution generates recoherence to a final pure state. In some cases\npost-selection can even suppress any decoherence.",
"arxiv_id": "quant-ph/9501023",
"authors": [
"B. Reznik"
],
"categories": [
"quant-ph",
"gr-qc",
"hep-th"
],
"title": "Interaction with a pre and post selected environment and recoherence",
"url": "https://arxiv.org/abs/quant-ph/9501023"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "e435ac18-925f-4ce2-af7c-526aaa13ce4e",
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"type": "Model",
"variant": "snapshot-2026-03-01",
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