Selvia AI Research
The Coherence Engine
Presence is coherence. Building the felt sense that someone is truly there.
A digital human does not fail because a single frame is imperfect. It fails the moment its faculties fall out of phase — when the expression lags the words, when the reply comes a beat too late, when it forgets you, when it answers the room instead of you. In that instant the illusion of someone being there collapses. That collapse has a name in physics — decoherence — and it is the real name of the uncanny valley.
Most of the field is chasing photorealism. We believe presence is not a rendering problem. It is a coherence problem: the felt sense that someone is truly present emerges only when every faculty stays phase-locked, in real time, all at once. Solving that is the whole of our research.
The Coherence Engine is our real-time system for holding a digital human together. It is built from four proprietary pillars, each responsible for one faculty of presence.
The four pillars
Expressive Presence
Spectra
A continuously evolving emotional spectrum, alive on her face.
Read the pillar
Real-Time Presence
Entanglement
She responds the instant you stop — live, and many at once.
Read the pillar
Living Memory
Eigenstate
She recognises you and remembers, across every visit.
Read the pillar
Focused Attention
Decoherence Shield
She attends to you, even in a crowded room.
Read the pillar
Our thesis
The hard, unsolved problem in digital humans is not a prettier face. It is presence held together in real time — expressive, instant, personal, and focused — all at once, and affordably enough to run at scale. Coherence is not a feature of the product. Coherence is the product.
See coherence in a live conversation
Talk to a Selvia AI digital human — expressive, instant, and present.
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