Storage of classical information in quantum spins
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Title: | Storage of classical information in quantum spins |
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Authors: | Delgado Acosta, Fernando | Fernández-Rossier, Joaquín |
Research Group/s: | Grupo de Nanofísica |
Center, Department or Service: | Universidad de Alicante. Departamento de Física Aplicada |
Keywords: | Digital magnetic recording | Classical information | Quantum spins | STM | Single magnetic atom |
Knowledge Area: | Física de la Materia Condensada |
Issue Date: | 11-May-2012 |
Publisher: | American Physical Society |
Citation: | DELGADO, F.; FERNÁNDEZ-ROSSIER, J. “Storage of classical information in quantum spins”. Physical Review Letters. Vol. 108, No. 19 (11 May 2012). ISSN 0031-9007, pp. 196602-1/5 |
Abstract: | Digital magnetic recording is based on the storage of a bit of information in the orientation of a magnetic system with two stable ground states. Here we address two fundamental problems that arise when this is done on a quantized spin: quantum spin tunneling and backaction of the readout process. We show that fundamental differences exist between integer and semi-integer spins when it comes to both reading and recording classical information in a quantized spin. Our findings imply fundamental limits to the miniaturization of magnetic bits and are relevant to recent experiments where a spin-polarized scanning tunneling microscope reads and records a classical bit in the spin orientation of a single magnetic atom. |
Sponsor: | This work was supported by MEC-Spain (Grants No. MAT07-67845, and No. FIS2010-21883-C02-01, Grant No. JCI-2008-01885 and CONSOLIDER Grant No. CSD2007-00010) and Generalitat Valenciana (Grant No. ACOMP/2010/070). |
URI: | http://hdl.handle.net/10045/25259 |
ISSN: | 0031-9007 (Print) | 1079-7114 (Online) |
DOI: | 10.1103/PhysRevLett.108.196602 |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Rights: | © 2012 American Physical Society |
Peer Review: | si |
Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.108.196602 |
Appears in Collections: | INV - Grupo de Nanofísica - Artículos de Revistas |
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2012_PhysRevLett.108.196602.pdf | 265,85 kB | Adobe PDF | Open Preview | |
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