Quantum computing in molecular magnets

By M. N. Leuenberger, Daniel Loss. Nature, 2000

2,454 citations recorded by the source corpus.

Shor and Grover demonstrated that a quantum computer can outperform any classical computer in factoring numbers and in searching a database by exploiting the parallelism of quantum mechanics. Whereas Shor's algorithm requires both superposition and entanglement of a many-particle system, the superposition of single-particle quantum states is sufficient for Grover's algorithm. Recently, the latter has been successfully implemented using Rydberg atoms. Here we propose an implementation of Grover's algorithm that uses molecular magnets, which are solid-state systems with a large spin; their spin eigenstates make them natural candidates for single-particle systems. We show theoretically that molecular magnets can be used to build dense and efficient memory devices based on the Grover algorithm. In particular, one single crystal can serve as a storage unit of a dynamic random access memory device. Fast electron spin resonance pulses can be used to decode and read out stored numbers of up to 105, with access times as short as 10-10 seconds. We show that our proposal should be feasible using the molecular magnets Fe8 and Mn12.

Subfields: Biophysics, Electronic, Optical and Magnetic Materials, Spectroscopy

View Paper: https://www.semanticscholar.org/paper/21c2a1a7b4ce0f3c9b67b0b45b6d6650f4f8d18f

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Biophysics

1. A. Zabala‐Lekuona
2. J. Seco
3. Sabre Kais
4. Zixuan Hu
5. Barry C. Sanders
6. Yuchen Wang
7. E. Colacio
8. M. Ternes

In Electronic, Optical and Magnetic Materials

1. A. Zabala‐Lekuona
2. J. Seco
3. Sabre Kais
4. Zixuan Hu
5. Barry C. Sanders
6. Yuchen Wang
7. E. Colacio
8. M. Ternes

In Spectroscopy

1. A. Zabala‐Lekuona
2. J. Seco
3. Sabre Kais
4. Zixuan Hu
5. Barry C. Sanders
6. Yuchen Wang
7. E. Colacio
8. M. Ternes

Citations in the corpus

• Exchange-biased quantum tunnelling in a supramolecular dimer of single-molecule magnets (2002, background): “Quantum tunnelling of magnetization can be advantageous for some potential applications of SMMs, for example, in providing the quantum superposition of states required for quantum computing”
• Qudits and High-Dimensional Quantum Computing (2020, methodology): “The qudit-based quantum computing system can be implemented on various physical platforms such as photonic systems [60, 106]; continuous spin systems [2, 11]; ion trap [91]; nuclear magnetic resonance [48, 62] and molecular magnets [99].”
• Single-Molecule Magnets: From Mn12-ac to dysprosium metallocenes, a travel in time (2021, methodology): “Interestingly, Grover’s algorithm was successfully implemented for molecular magnets proving their candidature for this purpose [208].”