Our second group publication in the journal "Quantum" within three weeks: The article "Far from Perfect: Quantum Error Correction with (Hyperinvariant) Evenbly Codes" introduces a new class of holographic qubit codes. In collaboration with TU Delft (The Netherlands), the University of Queensland (Australia), and OIST (Japan) we propose these "Evenbly codes" - named after a landmark 2017 paper by Glen Evenbly on "hyper-invariant" tensor networks - to describe both aspects of holographic dualities under bulk quantum corrections as well as subsystem qubit codes with potentially practical features. In particular, we show that different ways of gauge-fixing the bulk state lead to an encoding of bulk (logical) in boundary (physical) qubits that can protect well against different types of physical quantum errors. This applies ideas from pure high-energy theory on holographic dualities to practical questions of realizing quantum computation in noisy environments.

Link to publication: https://quantum-journal.org/papers/q-2025-08-08-1826/