TY - JOUR
T1 - Quantum landauer erasure with a molecular nanomagnet
AU - Gaudenzi, R.
AU - Burzurí, E.
AU - Maegawa, S.
AU - van der Zant, H. S.J.
AU - Luis, F.
N1 - 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
PY - 2018
Y1 - 2018
N2 - The erasure of a bit of information is an irreversible operation whose minimal entropy production of kB ln 2 is set by the Landauer limit1. This limit has been verified in a variety of classical systems, including particles in traps2,3 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.
AB - The erasure of a bit of information is an irreversible operation whose minimal entropy production of kB ln 2 is set by the Landauer limit1. This limit has been verified in a variety of classical systems, including particles in traps2,3 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.
UR - http://resolver.tudelft.nl/uuid:c3926045-6e1a-4dd7-a584-df4a5c6b51b6
UR - http://www.scopus.com/inward/record.url?scp=85051245170&partnerID=8YFLogxK
U2 - 10.1038/s41567-018-0070-7
DO - 10.1038/s41567-018-0070-7
M3 - Letter
AN - SCOPUS:85051245170
SN - 1745-2473
VL - 14
SP - 565
EP - 568
JO - Nature Physics
JF - Nature Physics
IS - 6
ER -
