dorsal/arxiv
View SchemaInterference induced preparation of spinpolarized electrons in a three-terminal quantum ring
| Authors | Orsolya Kalman, Peter Foldi, Mihaly G. Benedict, F. M. Peeters |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0612183 |
| URL | https://arxiv.org/abs/quant-ph/0612183 |
| DOI | 10.1016/j.physe.2007.08.014 |
| Journal | Physica E 40 (3), 567 (2008) |
Abstract
We present an exact, analytic solution of the spin dependent quantum transport problem with spin-orbit interaction in a one-dimensional mesoscopic ring with one input and two output leads. We demonstrate that for appropriate parameters spatial interference in the ring leads to a behavior analogous to that of the Stern-Gerlach apparatus: different spin polarizations can be achieved in the two output channels from an originally totally unpolarized incoming spin state. It is shown that this requires an appropriate interference of states that carry oppositely directed currents. We find that spin polarization is possible for several geometries, including the case when the device is not symmetric with respect to the incoming lead. A clear connection is established between the Stern-Gerlach like property of the device and the relevant Aharonov-Casher phases in the loop geometry.
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"abstract": "We present an exact, analytic solution of the spin dependent quantum\ntransport problem with spin-orbit interaction in a one-dimensional mesoscopic\nring with one input and two output leads. We demonstrate that for appropriate\nparameters spatial interference in the ring leads to a behavior analogous to\nthat of the Stern-Gerlach apparatus: different spin polarizations can be\nachieved in the two output channels from an originally totally unpolarized\nincoming spin state. It is shown that this requires an appropriate interference\nof states that carry oppositely directed currents. We find that spin\npolarization is possible for several geometries, including the case when the\ndevice is not symmetric with respect to the incoming lead. A clear connection\nis established between the Stern-Gerlach like property of the device and the\nrelevant Aharonov-Casher phases in the loop geometry.",
"arxiv_id": "quant-ph/0612183",
"authors": [
"Orsolya Kalman",
"Peter Foldi",
"Mihaly G. Benedict",
"F. M. Peeters"
],
"categories": [
"quant-ph"
],
"doi": "10.1016/j.physe.2007.08.014",
"journal_ref": "Physica E 40 (3), 567 (2008)",
"title": "Interference induced preparation of spinpolarized electrons in a three-terminal quantum ring",
"url": "https://arxiv.org/abs/quant-ph/0612183"
},
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