dorsal/arxiv
View SchemaFidelity optimization for holonomic quantum gates in dissipative environments
| Authors | Daniele Parodi, Maura Sassetti, Paolo Solinas, Paolo Zanardi, Nino Zanghi |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0510056 |
| URL | https://arxiv.org/abs/quant-ph/0510056 |
| DOI | 10.1103/PhysRevA.73.052304 |
| Journal | Phys. Rev. A 73, 052304 (2006) |
Abstract
We analyze the performance of holonomic quantum gates in semi-conductor quantum dots, driven by ultrafast lasers, under the effect of a dissipative environment. In agreement with the standard practice, the environment is modeled as a thermal bath of oscillators linearly coupled with the excitonic states of the quantum dot. Standard techniques of quantum dissipation make the problem amenable to a numerical treatment and allow to determine the fidelity (the common gate-performance estimator), as a function of all the relevant physical parameters. As a consequence of our analysis, we show that, by varying in a suitable way the controllable parameters, the disturbance of the environment can be (approximately) suppressed, and the performance of the gate optimized--provided that the thermal bath is purely superhomic. We conclude by showing that such an optimization it is impossible for ohmic environments.
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"abstract": "We analyze the performance of holonomic quantum gates in semi-conductor\nquantum dots, driven by ultrafast lasers, under the effect of a dissipative\nenvironment. In agreement with the standard practice, the environment is\nmodeled as a thermal bath of oscillators linearly coupled with the excitonic\nstates of the quantum dot. Standard techniques of quantum dissipation make the\nproblem amenable to a numerical treatment and allow to determine the fidelity\n(the common gate-performance estimator), as a function of all the relevant\nphysical parameters. As a consequence of our analysis, we show that, by varying\nin a suitable way the controllable parameters, the disturbance of the\nenvironment can be (approximately) suppressed, and the performance of the gate\noptimized--provided that the thermal bath is purely superhomic. We conclude by\nshowing that such an optimization it is impossible for ohmic environments.",
"arxiv_id": "quant-ph/0510056",
"authors": [
"Daniele Parodi",
"Maura Sassetti",
"Paolo Solinas",
"Paolo Zanardi",
"Nino Zanghi"
],
"categories": [
"quant-ph",
"cond-mat.mes-hall"
],
"doi": "10.1103/PhysRevA.73.052304",
"journal_ref": "Phys. Rev. A 73, 052304 (2006)",
"title": "Fidelity optimization for holonomic quantum gates in dissipative environments",
"url": "https://arxiv.org/abs/quant-ph/0510056"
},
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