000078352 001__ 78352 000078352 005__ 20200117213748.0 000078352 0247_ $$2doi$$a10.1038/s41567-018-0070-7 000078352 0248_ $$2sideral$$a105449 000078352 037__ $$aART-2018-105449 000078352 041__ $$aeng 000078352 100__ $$aGaudenzi, R. 000078352 245__ $$aQuantum Landauer erasure with a molecular nanomagnet 000078352 260__ $$c2018 000078352 5060_ $$aAccess copy available to the general public$$fUnrestricted 000078352 5203_ $$aThe 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. 000078352 536__ $$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2015-68204-R$$9info:eu-repo/grantAgreement/EC/FP7/618082/EU/Electrical spin manipulation in electroACtive MOLecules/ACMOL$$9info:eu-repo/grantAgreement/ES/DGA/E98-MOLCHIP$$9info:eu-repo/grantAgreement/EUR/COST/15128 000078352 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/ 000078352 590__ $$a20.113$$b2018 000078352 591__ $$aPHYSICS, MULTIDISCIPLINARY$$b3 / 81 = 0.037$$c2018$$dQ1$$eT1 000078352 592__ $$a9.515$$b2018 000078352 593__ $$aPhysics and Astronomy (miscellaneous)$$c2018$$dQ1 000078352 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion 000078352 700__ $$aBurzurí, E. 000078352 700__ $$aMaegawa, S. 000078352 700__ $$avan der Zant, H.S.J. 000078352 700__ $$0(orcid)0000-0001-6284-0521$$aLuis, F.$$uUniversidad de Zaragoza 000078352 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada 000078352 773__ $$g14 (2018), 565-568$$pNat. Phys.$$tNature Physics$$x1745-2473 000078352 8564_ $$s10414108$$uhttps://zaguan.unizar.es/record/78352/files/texto_completo.pdf$$yPostprint 000078352 8564_ $$s119294$$uhttps://zaguan.unizar.es/record/78352/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint 000078352 909CO $$ooai:zaguan.unizar.es:78352$$particulos$$pdriver 000078352 951__ $$a2020-01-17-21:30:31 000078352 980__ $$aARTICLE