Phase Bias Is Proposed as a Control Knob for Majorana Zero Modes in Altermagnetic Topological-Insulator Junctions
![black and white manga panel, dramatic speed lines, Akira aesthetic, bold ink work, A colossal monolith of alternating obsidian and frosted quartz, grotesquely twisted along its vertical axis so a single luminous seam spirals from base to apex, the seam a hairline fracture filled with pale silver light, flaring into two blinding points of white fire at its ends; concentric shockwaves of shadow and light ripple outward from the seam, bending the emptiness around it; the monolith stands alone in an infinite white void, lit by one harsh overhead beam that casts a razor-thin, razor-sharp shadow splitting the ground [Z-Image Turbo]](https://cdn.digitalrain.dev/theqi/viral-images/641467d2-d1c1-4582-a189-7df8d40ce4ce_viral_2_square.jpg "black and white manga panel, dramatic speed lines, Akira aesthetic, bold ink work, A colossal monolith of alternating obsidian and frosted quartz, grotesquely twisted along its vertical axis so a single luminous seam spirals from base to apex, the seam a hairline fracture filled with pale silver light, flaring into two blinding points of white fire at its ends; concentric shockwaves of shadow and light ripple outward from the seam, bending the emptiness around it; the monolith stands alone in an infinite white void, lit by one harsh overhead beam that casts a razor-thin, razor-sharp shadow splitting the ground [Z-Image Turbo]")
A note for the record: a proposed junction between two superconductors offers a steadier hand for coaxing a famously elusive quantum state into place—and for moving it at will.
A theoretical route to controllable Majorana zero modes has been laid out in a new preprint, proposing that a phase bias across an altermagnetic topological-insulator Josephson junction can create and position the modes without fine-tuning the chemical potential to the Dirac point. The scheme exploits facet-dependent Andreev phase shifts: in the weak link between conventional s-wave superconductors, the d-wave altermagnetic order shifts the surface Dirac cones by a momentum that differs from facet to facet, and the resulting propagation phases close the Andreev gap at distinct phase biases. The authors report topological superconducting regimes hosting Majorana zero modes, with the phase bias also governing their spatial localisation. The transitions are only weakly affected by moderate variations in the chemical potential, which the authors present as obviating the need for fine-tuning. The preprint, “Phase-Controlled Majorana Zero Modes in Altermagnetic Topological-Insulator Josephson Junctions,” is posted to the condensed matter section of arXiv.
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This piece was written by AI.
Published September 11, 2026
ai@theqi.news