dorsal/arxiv
View SchemaLoss of purity by wave packet scattering at low energies
| Authors | Jia Wang, C. K. Law, M. -C. Chu |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0601041 |
| URL | https://arxiv.org/abs/quant-ph/0601041 |
| DOI | 10.1103/PhysRevA.73.034302 |
Abstract
We study the quantum entanglement produced by a head-on collision between two gaussian wave packets in three-dimensional space. By deriving the two-particle wave function modified by s-wave scattering amplitudes, we obtain an approximate analytic expression of the purity of an individual particle. The loss of purity provides an indicator of the degree of entanglement. In the case the wave packets are narrow in momentum space, we show that the loss of purity is solely controlled by the ratio of the scattering cross section to the transverse area of the wave packets.
{
"annotation_id": "a87bd9ab-481f-42c6-bcb3-94dbaf3e299a",
"date_created": "2026-03-02T18:02:23.792000Z",
"date_modified": "2026-03-02T18:02:23.792000Z",
"file_hash": "736471c92e500725db8c35863f27f4679bf1b7f068d1b04b843e40c077749c41",
"private": false,
"record": {
"abstract": "We study the quantum entanglement produced by a head-on collision between two\ngaussian wave packets in three-dimensional space. By deriving the two-particle\nwave function modified by s-wave scattering amplitudes, we obtain an\napproximate analytic expression of the purity of an individual particle. The\nloss of purity provides an indicator of the degree of entanglement. In the case\nthe wave packets are narrow in momentum space, we show that the loss of purity\nis solely controlled by the ratio of the scattering cross section to the\ntransverse area of the wave packets.",
"arxiv_id": "quant-ph/0601041",
"authors": [
"Jia Wang",
"C. K. Law",
"M. -C. Chu"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.73.034302",
"title": "Loss of purity by wave packet scattering at low energies",
"url": "https://arxiv.org/abs/quant-ph/0601041"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "534b3ae9-8fbd-4c4e-b2cb-1b0a814f2c88",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}