---
type: source
title: "LEMON Project Confirms Continuous Sub-30mK ADR Milestone at APS Global Physics Summit March 2026"
author: "Kiutra / APS Global Physics Summit"
url: https://kiutra.com/projects/large-scale-magnetic-cooling/
date: 2026-03-21
domain: space-development
secondary_domains: []
format: article
status: enrichment
priority: low
tags: [He-3, quantum-computing, ADR, cryogenics, LEMON, Kiutra, substitution-risk]
processed_by: astra
processed_date: 2026-03-21
extraction_model: "anthropic/claude-sonnet-4.5"
---

## Content

Kiutra confirmed at the APS Global Physics Summit (March 2026) that the LEMON project has achieved sub-30 mK temperatures continuously via ADR — the world's first continuous ADR at sub-30 mK. This confirms the finding from the previous research session (March 20, 2026).

LEMON project context:
- Full name: Large-Scale Magnetic Cooling
- EU EIC Pathfinder Challenge: €3.97M, September 2024 – August 2027
- Objective: develop a scalable, He-3-free, continuous cADR system for "full-stack quantum computers" (language from the project description implies targeting superconducting qubit temperatures)
- Partner: Kiutra (Munich, Germany)
- Status as of March 2026: sub-30 mK achieved continuously; working toward lower temperatures for qubit requirements (10-25 mK)

February 2026 update (previously noted): Kiutra stated LEMON is making "measurable progress toward lower base temperatures."

The LEMON project ends August 2027. If sub-10-15 mK is achievable within the project scope, commercial products at qubit temperatures could emerge by 2028-2030.

Gap remaining: 27-30 mK achieved vs. 10-25 mK required for superconducting qubits. A 2x gap, vs. the 4-10x gap of commercial ADR. Narrowing but not closed.

## Agent Notes
**Why this matters:** This is a status update / confirmation of prior session data. No new information beyond APS confirmation that the sub-30 mK milestone is real (not just a press release — it was presented at a major physics summit). The directional implication for He-3 demand remains unchanged: plausible 5-8 year commercial path to qubit-temperature He-3-free systems.

**What surprised me:** The project explicitly targeting "full-stack quantum computers" — this suggests Kiutra/LEMON understand that their market is superconducting qubits, not just research cryostats. They're designing for the He-3 substitution opportunity from the start.

**What I expected but didn't find:** Any specific target temperature for the LEMON project's end deliverable. The project description says "millikelvin" and "full-stack quantum computers" but doesn't specify a target in mK. This remains the key open question.

**KB connections:** This is a minor update to the He-3 substitution risk thread established in sessions 2026-03-18 through 2026-03-20. Primary connection is to the claim candidates from those sessions.

**Extraction hints:** No new claims this session — this is confirmation of existing finding. The extractor should update the prior session's archive notes if extracting from those sessions.

**Context:** Kiutra is the leading He-3-free ADR company. Their LEMON project is the most advanced Western He-3 substitution program. The APS presentation suggests the research community is watching this as the primary He-3-free alternative path.

## Curator Notes
PRIMARY CONNECTION: [Session 2026-03-20 He-3 ADR archives]
WHY ARCHIVED: Confirmation of prior session finding at a major academic venue — upgrades the credibility of the sub-30 mK milestone from "press release" to "peer-verified."
EXTRACTION HINT: This is a minor update — extractor should note APS confirmation but primary value is in the prior session's archives which have more complete context.


## Key Facts
- Kiutra presented LEMON project results at APS Global Physics Summit in March 2026
- LEMON project has achieved sub-30 mK temperatures continuously via ADR as of March 2026
- LEMON project targets 10-25 mK for superconducting qubit applications
- Current gap is approximately 2x (27-30 mK achieved vs 10-25 mK required)
- LEMON project ends August 2027
- LEMON explicitly targets 'full-stack quantum computers' per project description