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

Abstract

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.

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• Exponentially Enhanced Scheme for the Heralded Qudit GHZ State in Linear Optics
• Low temperature decoherence dynamics in molecular spin systems using the Lindblad master equation
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• Mitigating decoherence in molecular spin qudits
• Optimal Control of Spin Qudits Subject to Decoherence Using Amplitude-and-Frequency-Constrained Pulses
• Time Crystals from single-molecule magnet arrays
• Magnetoelectric effect in the mixed valence polyoxovanadate cage V${}_{12}$
• Analog Circuit-QED Simulator of Quantum Spin Dynamics Through the Extended Bose-Hubbard Model
• Fault-Tolerant Encoding of Logical Qudits in Spin Systems
• Synthesis of Single Qutrit Circuits from Clifford+R