dorsal/arxiv
View SchemaQuantum Coherence Oscillations in Antiferromagnetic Chains
| Authors | Marius Grigorescu, Mahi R. Singh |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9808041 |
| URL | https://arxiv.org/abs/quant-ph/9808041 |
| DOI | 10.1103/PhysRevB.59.6013 |
| Journal | Phys.Rev.B59:6013,1999 |
Abstract
Macroscopic quantum coherence oscillations in mesoscopic antiferromagnets may appear when the anisotropy potential creates a barrier between the antiferromagnetic states with opposite orientations of the Neel vector. This phenomenon is studied for the physical situation of the nuclear spin system of eight Xe atoms arranged on a magnetic surface along a chain. The oscillation period is calculated as a function of the chain constant. The environmental decoherence effects at finite temperature are accounted assuming a dipole coupling between the spin chain and the fluctuating magnetic field of the surface. The numerical calculations indicate that the oscillations are damped by a rate $\sim (N-1)/ \tau$, where $N$ is the number of spins and $\tau$ is the relaxation time of a single spin.
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"abstract": "Macroscopic quantum coherence oscillations in mesoscopic antiferromagnets may\nappear when the anisotropy potential creates a barrier between the\nantiferromagnetic states with opposite orientations of the Neel vector. This\nphenomenon is studied for the physical situation of the nuclear spin system of\neight Xe atoms arranged on a magnetic surface along a chain. The oscillation\nperiod is calculated as a function of the chain constant. The environmental\ndecoherence effects at finite temperature are accounted assuming a dipole\ncoupling between the spin chain and the fluctuating magnetic field of the\nsurface. The numerical calculations indicate that the oscillations are damped\nby a rate $\\sim (N-1)/ \\tau$, where $N$ is the number of spins and $\\tau$ is\nthe relaxation time of a single spin.",
"arxiv_id": "quant-ph/9808041",
"authors": [
"Marius Grigorescu",
"Mahi R. Singh"
],
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"quant-ph"
],
"doi": "10.1103/PhysRevB.59.6013",
"journal_ref": "Phys.Rev.B59:6013,1999",
"title": "Quantum Coherence Oscillations in Antiferromagnetic Chains",
"url": "https://arxiv.org/abs/quant-ph/9808041"
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