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Can We Break the Landauer Bound in Spin-Based Electronics?

Wang, Frank Z. (2021) Can We Break the Landauer Bound in Spin-Based Electronics? IEEE Access, 9 . pp. 67109-67116. ISSN 2169-3536. E-ISSN 2169-3536. (doi:10.1109/ACCESS.2021.3076479) (KAR id:88044)

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Abstract

We found that the minimum energy of reading or erasing a spin datum should be expressed by delta E = 2*uB*B, in contrast to delta E = kB*T*ln(2) proposed by Landauer in 1961. The physics of using a spin'sorientation to represent a bit of information is fundamentally different from that of using a particle's position in classical charge-based data storage: the former is quantum-dynamic (independent of temperature below the Curie point), whereas the latter is thermodynamic (dependent on temperature). Quantitatively, this newenergy bound associated with a new information erasure protocol was estimated as 1.64e-36 J, 15 orders of magnitude lower than the Landauer bound (3e-21 J), at no cost of angular momentum and increasedtotal entropy. In this new information erasure protocol, there is no need to move the electron from one side of the potential well to the other side otherwise the energy used to retain the defined spin state still needs to be greater than the existing thermal fluctuation (the Landauer bound). We verified our new energy bound based on a number of experiments including the Rydberg atom and the spin-spin interaction.

Item Type: Article
DOI/Identification number: 10.1109/ACCESS.2021.3076479
Uncontrolled keywords: Low power electronics, the Landauer bound, spintronics, irreversible computing, green computing, energy Internet, smart grid, quantum computing.
Subjects: Q Science
Q Science > QA Mathematics (inc Computing science) > QA 75 Electronic computers. Computer science
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Computing
Depositing User: Frank Wang
Date Deposited: 11 May 2021 13:01 UTC
Last Modified: 11 May 2021 13:04 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/88044 (The current URI for this page, for reference purposes)
Wang, Frank Z.: https://orcid.org/0000-0003-4378-2172

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