Storage of classical information in quantum spins

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 back-action of the readout process. We show that fundamental differences exist between integer and semi-integer spins when it comes to both, read and record classical information in a quantized spin. Our findings imply fundamental limits to the miniaturization of magnetic bits and are relevant to recent experiments where spin polarized scanning tunneling microscope reads and records a classical bit in the spin orientation of a single magnetic atom.

References in corpus (3)

• Spin Inelastic Electron Tunneling Spectroscopy on Local Spin Adsorbed on Surface
• Spin dynamics of current driven single magnetic adatoms and molecules
• Quenching of magnetic excitations in single adsorbates at surfaces: Mn on CuN/Cu(100)

Cited by in corpus (18)

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• Spin decoherence of magnetic atoms on surfaces
• Probing Magnetic Excitations and Correlations in Single and Coupled Spin Systems with Scanning Tunneling Spectroscopy
• Magnetic Ground State of an Individual Fe2+ Ion in Strained Semiconductor Nanostructure
• Harnessing the Quantum Behavior of Spins on Surfaces
• The emergence of classical behavior in magnetic adatoms
• A theoretical review on the single-impurity electron spin resonance on surfaces
• Consequences of Kondo exchange on quantum spins
• Correlation-mediated processes for electron-induced switching between Neel states of Fe anti-ferromagnetic chains
• Interplay of Lorentz-Berry forces in position-momentum spaces for valley-dependent impurity scattering in alpha-T3 lattices
• Competition between quantum spin tunneling and Kondo effect
• Magnetic adatoms as memory bits: A quantum master equation analysis
• Extremely long-lived magnetic excitations in supported Fe chains
• Gating classical information flow through spin chains by quantum phase transitions
• Manipulation and readout of spin states of a single-molecule magnet by a spin-polarized current
• Integrated information storage and transfer with a coherent magnetic device
• The geometric phase of Z${}_n$- and T-symmetric nanomagnets as a classification toolkit
• Spin transport through a nanojunction with a precessing anisotropic molecular spin: Quantum interference and spin-transfer torque