dorsal/arxiv
View SchemaQuantum coherence and interaction-free measurements
| Authors | S. Potting, E. S. Lee, W. Schmitt, I. Rumyantsev, B. Mohring, P. Meystre |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0007014 |
| URL | https://arxiv.org/abs/quant-ph/0007014 |
| DOI | 10.1103/PhysRevA.62.060101 |
| Journal | Phys. Rev. A 62 (2000) 060101(R) |
Abstract
We investigate the extent to which ``interaction-free'' measurements perturb the state of quantum systems. We show that the absence of energy exchange during the measurement is not a sufficient criterion to preserve that state, as the quantum system is subject to measurement dependent decoherence. While it is possible in general to design interaction-free measurement schemes that do preserve that state, the requirement of quantum coherence preservation rapidly leads to a very low efficiency. Our results, which have a simple interpretation in terms of ``which-way'' arguments, open up the way to novel quantum non-demolition techniques.
{
"annotation_id": "a13238d5-aa93-46cd-8515-41c6fa23dfa9",
"date_created": "2026-03-02T18:01:38.148000Z",
"date_modified": "2026-03-02T18:01:38.148000Z",
"file_hash": "ac87f5836fa0ae3aaf41098bad70845d0be1f1760ca12cfa35cfd82d73c573c3",
"private": false,
"record": {
"abstract": "We investigate the extent to which ``interaction-free\u0027\u0027 measurements perturb\nthe state of quantum systems. We show that the absence of energy exchange\nduring the measurement is not a sufficient criterion to preserve that state, as\nthe quantum system is subject to measurement dependent decoherence. While it is\npossible in general to design interaction-free measurement schemes that do\npreserve that state, the requirement of quantum coherence preservation rapidly\nleads to a very low efficiency. Our results, which have a simple interpretation\nin terms of ``which-way\u0027\u0027 arguments, open up the way to novel quantum\nnon-demolition techniques.",
"arxiv_id": "quant-ph/0007014",
"authors": [
"S. Potting",
"E. S. Lee",
"W. Schmitt",
"I. Rumyantsev",
"B. Mohring",
"P. Meystre"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.62.060101",
"journal_ref": "Phys. Rev. A 62 (2000) 060101(R)",
"title": "Quantum coherence and interaction-free measurements",
"url": "https://arxiv.org/abs/quant-ph/0007014"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "910fc5a2-c859-4af8-80bf-936b9d9522d1",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}