Implementing the Quantum Fourier Transform on a molecular qudit with full refocusing and state tomography
Another great article from the research group in the Department of Mathematical, Physical and Computer Sciences led by Prof. Roberto De Renzi at the University in Parma where our AWG-5000 Arbitrary Waveform Generator has been adopted to manipulate qudit
Implementing the Quantum Fourier Transform on a molecular qudit with full refocusing and state tomography
Marcos Rubín-Osanz, Laura Bersani, Simone Chicco, Giuseppe Allodi, Roberto De Renzi, Athanasios Mavromagoulos, Michael D. Roy, Stergios Piligkos, Elena Garlatti & Stefano Carretta
Molecular spin qudits based on lanthanide complexes offer a promising platform for quantum technologies, combining chemical tunability with multi-level encoding. However, experimental
demonstrations of their envisaged capabilities remain scarce, posing the difficulty of achieving precise control over coherences between qudit states in long pulse sequences. Here, we implement
in a 173Yb(trensal) qudit the Quantum Fourier Transform (QFT), a core component of numerous quantum algorithms, storing quantum information in the phases of coherences. QFT provides an
ideal benchmark for coherence manipulation and a challenge for molecular spin qudits.
Apparatus. Coherent control was achieved via RF pulses, sent with an Arbitrary Waveform Generator (AWG) (Arb Rider AWG-5062D, hereafter AWG) from Active Technologies. The experimental setup consisted of two different pulse generators—a 6 GS/s AWG by Active Technologies, model AWG-5062D, and the HyReSpect spectrometer—that sent pulses to a probehead (an LC circuit with a widebandwidth) where the sample was located.
The full paper ha been published by NATURE available HERE
The AWG-5000 can generate sub-nanosecond pulses down to 230 ps reaching a voltage amplitude of 5Vpp on 50 ohm load and fast rise and fall time smaller than 110 ps. The pulses can be generated with any arbitrary shape giving the user the maximum of the flexibility in all the experiment conditions.
Ferrara – Italy, 13.05.2026
