dorsal/arxiv
View SchemaTransient dynamics of light propagation in EIT medium and hidden symmetry of multi-bit quantum memory
| Authors | Y. Li, X. F. Liu, C. P. Sun |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0306170 |
| URL | https://arxiv.org/abs/quant-ph/0306170 |
Abstract
We investigate the transient phenomenon or property of the propagation of an optical probe field in a medium consisting of many $\Lambda$-type three-level atoms coupled to this probe field and an classical driven field. We observe a hidden symmetry and obtain an exact solution for this light propagation problem by means of the spectral generating method. This solution enlightens us to propose a practical protocol implementing the quantum memory robust for quantum decoherence in a crystal. As an transient dynamic process this solution also manifests an exotic result that a wave-packet of light will split into three packets propagating at different group velocities. It is argued that "super-luminal group velocity" and "sub-luminal group velocity" can be observed simultaneously in the same system. This interesting phenomenon is expected to be demonstrated experimentally.
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"date_created": "2026-03-02T18:01:59.863000Z",
"date_modified": "2026-03-02T18:01:59.863000Z",
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"abstract": "We investigate the transient phenomenon or property of the propagation of an\noptical probe field in a medium consisting of many $\\Lambda$-type three-level\natoms coupled to this probe field and an classical driven field. We observe a\nhidden symmetry and obtain an exact solution for this light propagation problem\nby means of the spectral generating method. This solution enlightens us to\npropose a practical protocol implementing the quantum memory robust for quantum\ndecoherence in a crystal. As an transient dynamic process this solution also\nmanifests an exotic result that a wave-packet of light will split into three\npackets propagating at different group velocities. It is argued that\n \"super-luminal group velocity\" and \"sub-luminal group velocity\" can be\nobserved simultaneously in the same system. This interesting phenomenon is\nexpected to be demonstrated experimentally.",
"arxiv_id": "quant-ph/0306170",
"authors": [
"Y. Li",
"X. F. Liu",
"C. P. Sun"
],
"categories": [
"quant-ph"
],
"title": "Transient dynamics of light propagation in EIT medium and hidden symmetry of multi-bit quantum memory",
"url": "https://arxiv.org/abs/quant-ph/0306170"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "887224e0-3faf-46ce-aa00-353f904cd3d3",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
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