Quantum landauer erasure with a molecular nanomagnet

Quantum landauer erasure with a molecular nanomagnet

Gaudenzi, R. (TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft)
Burzuri Linares, E.
Maegawa, S. (Kyoto University)
van der Zant, H.S.J. (TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft)
Luis, F. (Universidad de Zaragoza)

2018

The erasure of a bit of information is an irreversible operation whose minimal entropy production of k_B ln 2 is set by the Landauer limit¹. This limit has been verified in a variety of classical systems, including particles in traps^2,3 and nanomagnets⁴. Here, we extend it to the quantum realm by using a crystal of molecular nanomagnets as a quantum spin memory and showing that its erasure is still governed by the Landauer principle. In contrast to classical systems, maximal energy efficiency is achieved while preserving fast operation owing to its high-speed spin dynamics. The performance of our spin register in terms of energy-time cost is orders of magnitude better than existing memory devices to date. The result shows that thermodynamics sets a limit on the energy cost of certain quantum operations and illustrates a way to enhance classical computations by using a quantum system.

http://resolver.tudelft.nl/uuid:c3926045-6e1a-4dd7-a584-df4a5c6b51b6

https://doi.org/10.1038/s41567-018-0070-7

1745-2473

Nature Physics, 14 (6), 565-568

Author correction: In the version of this Letter originally published, the key to the green and open circles in Fig. 4 was reversed; it should have shown that the green circles correspond to 'From χ versus T' and the open circles correspond to 'From χ versus H y '. This has now been corrected in all versions of the Letter. (Figure Presented). DOI: 10.1038/s41567-018-0140-x

Institutional Repository

journal article

© 2018 R. Gaudenzi, E. Burzuri Linares, S. Maegawa, H.S.J. van der Zant, F. Luis