A chain carefully designed in an alternating pattern can function as a single body whose phase noise collapses to exactly zero using the coupling pattern itself as a barrier. The qualifier USC or ultrastrong coupling is the regime which carries specific meaning in quantum physics and has been shown that ultrastrong longitudinal coupling can be specified such that a new physics appears.

Qubits have two well-characterized failure modes. T₁ — relaxation (energy loss) and T₂ — dephasing (phase randomization). Relaxation (of a physical qubit) describes the qubit shedding energy to the environment, dropping its ground state and erasing whatever information was stored. When both channels are suppressed by a chain of qubits that is arranged in a specific pattern – specifically when quantum mechanically coupled – dephasing is prevented by employing an exact symmetry. And by using standard Ising-model chains (which) couple all neighbors along the same axis (XX throughout), dephasing is driven to zero.

BUT Logical errors require logical‑level error correction and this is were our model shines! Our logical qubit(s) is encoded in a symmetry‑protected, decoherence‑free, noise‑biased subspace where dephasing is suppressed at the logical level, not just the physical level and is our primary design principle.

Our user-defined image below is a (sample) solid of our curve generated by IBM™ processors that reflects our new physics and is embedded in our computing services – gijane®.

(Note: The authoritative USC regime definition and experimental history for readers is available to for those who want deeper background in other markets and is not available here.)