Event description
Abstract: The realization of effective quantum error correction protocols remains a central
challenge in the development of scalable quantum computers. Employing highdimensional
quantum systems (qudits) can offer more hardware-efficient protocols
than qubit-based approaches. Using electron-nuclear double resonance, we implement
a logical qubit encoded on the four states of a I = 3/2 nuclear spin hyperfine-coupled to
a S = 1/2 electron spin qubit; the encoding protects against the dominant decoherence
mechanism in such systems, fluctuations of the quantizing magnetic field. We explore
the dynamics of the encoded state both under a controlled application of the fluctuation
and under natural decoherence processes. Our results confirm the potential of these
proposals for practical, implementable, fault tolerant quantum memories.