Proof-of-concept Quantum Simulator based on Molecular Spin Qudits

• Published in: arXiv.org
• Main Authors: Chicco, Simone, Allodi, Giuseppe, Chiesa, Alessandro, Garlatti, Elena, Buch, Christian D, Santini, Paolo, De Renzi, Roberto, Piligkos, Stergios, Carretta, Stefano
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 11.09.2023
• Subjects: Broadband; Error correction; Ising model; Physics - Quantum Physics; Quantum tunnelling; Qubits (quantum computing); Radio frequency; Simulation; Simulators
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2309.05600

The use of \(d\)-level qudits instead of two-level qubits can largely increase the power of quantum logic for many applications, ranging from quantum simulations to quantum error correction. Molecular Nanomagnets are ideal spin systems to realize these large-dimensional qudits. Indeed, their Hamiltonian can be engineered to an unparalleled extent and can yield a spectrum with many low-energy states. In particular, in the last decade intense theoretical, experimental and synthesis efforts have been devoted to develop quantum simulators based on Molecular Nanomagnets. However, this remarkable potential is practically unexpressed, because no quantum simulation has ever been experimentally demonstrated with these systems. Here we show the first prototype quantum simulator based on an ensemble of molecular qudits and a radiofrequency broadband spectrometer. To demonstrate the operativity of the device, we have simulated quantum tunneling of the magnetization and the transverse-field Ising model, representative of two different classes of problems. These results represent an important step towards the actual use of molecular spin qudits in quantum technologies.