dorsal/arxiv
View SchemaQuantum Speed Limit for Perfect State Transfer in One Dimension
| Authors | Man-Hong Yung |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0603179 |
| URL | https://arxiv.org/abs/quant-ph/0603179 |
| DOI | 10.1103/PhysRevA.74.030303 |
| Journal | Phys. Rev. A 74, 030303(R) (2006) |
Abstract
The basic idea of spin chain engineering for perfect quantum state transfer (QST) is to find a set of coupling constants in the Hamiltonian, such that a particular state initially encoded on one site will evolve freely to the opposite site without any dynamical controls. The minimal possible evolution time represents a speed limit for QST. We prove that the optimal solution is the one simulating the precession of a spin in a static magnetic field. We also argue that, at least for solid-state systems where interactions are local, it is more realistic to characterize the computation power by the couplings than the initial energy.
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"abstract": "The basic idea of spin chain engineering for perfect quantum state transfer\n(QST) is to find a set of coupling constants in the Hamiltonian, such that a\nparticular state initially encoded on one site will evolve freely to the\nopposite site without any dynamical controls. The minimal possible evolution\ntime represents a speed limit for QST. We prove that the optimal solution is\nthe one simulating the precession of a spin in a static magnetic field. We also\nargue that, at least for solid-state systems where interactions are local, it\nis more realistic to characterize the computation power by the couplings than\nthe initial energy.",
"arxiv_id": "quant-ph/0603179",
"authors": [
"Man-Hong Yung"
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"quant-ph"
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"doi": "10.1103/PhysRevA.74.030303",
"journal_ref": "Phys. Rev. A 74, 030303(R) (2006)",
"title": "Quantum Speed Limit for Perfect State Transfer in One Dimension",
"url": "https://arxiv.org/abs/quant-ph/0603179"
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