dorsal/arxiv
View SchemaAbelian and non-Abelian geometric phases in adiabatic open quantum systems
| Authors | M. S. Sarandy, D. A. Lidar |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0507012 |
| URL | https://arxiv.org/abs/quant-ph/0507012 |
| DOI | 10.1103/PhysRevA.73.062101 |
| Journal | Phys. Rev. A 73, 062101 (2006) |
Abstract
We introduce a self-consistent framework for the analysis of both Abelian and non-Abelian geometric phases associated with open quantum systems, undergoing cyclic adiabatic evolution. We derive a general expression for geometric phases, based on an adiabatic approximation developed within an inherently open-systems approach. This expression provides a natural generalization of the analogous one for closed quantum systems, and we prove that it satisfies all the properties one might expect of a good definition of a geometric phase, including gauge invariance. A striking consequence is the emergence of a finite time interval for the observation of geometric phases. The formalism is illustrated via the canonical example of a spin-1/2 particle in a time-dependent magnetic field. Remarkably, the geometric phase in this case is immune to dephasing and spontaneous emission in the renormalized Hamiltonian eigenstate basis. This result positively impacts holonomic quantum computing.
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"abstract": "We introduce a self-consistent framework for the analysis of both Abelian and\nnon-Abelian geometric phases associated with open quantum systems, undergoing\ncyclic adiabatic evolution. We derive a general expression for geometric\nphases, based on an adiabatic approximation developed within an inherently\nopen-systems approach. This expression provides a natural generalization of the\nanalogous one for closed quantum systems, and we prove that it satisfies all\nthe properties one might expect of a good definition of a geometric phase,\nincluding gauge invariance. A striking consequence is the emergence of a finite\ntime interval for the observation of geometric phases. The formalism is\nillustrated via the canonical example of a spin-1/2 particle in a\ntime-dependent magnetic field. Remarkably, the geometric phase in this case is\nimmune to dephasing and spontaneous emission in the renormalized Hamiltonian\neigenstate basis. This result positively impacts holonomic quantum computing.",
"arxiv_id": "quant-ph/0507012",
"authors": [
"M. S. Sarandy",
"D. A. Lidar"
],
"categories": [
"quant-ph",
"cond-mat.mes-hall"
],
"doi": "10.1103/PhysRevA.73.062101",
"journal_ref": "Phys. Rev. A 73, 062101 (2006)",
"title": "Abelian and non-Abelian geometric phases in adiabatic open quantum systems",
"url": "https://arxiv.org/abs/quant-ph/0507012"
},
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