India's Defence Research and Development Organisation (DRDO) signed its first high-value deep-tech agreement under the Technology Development Fund (TDF), partnering with Alwar, Rajasthan-based start-up Zero mK India Private Limited to build a 20 millikelvin (mK) dilution refrigerator for quantum applications. The deal draws on the Rs 500 crore envelope Defence Minister Rajnath Singh approved for deep-tech and advanced-technology projects.

What does a 20 mK refrigerator do for a quantum lab?

Dilution refrigerators cool experimental chambers to the millikelvin range that several quantum computing platforms — superconducting qubits and certain spin-qubit architectures — require to suppress decoherence during operation and readout. A domestic 20 mK-class system addresses two recurring pain points for Indian research groups: lead times stretching into months on imported cryostats, and service contracts denominated in foreign currency.

Who is the partner?

Zero mK India Private Limited, headquartered in Alwar, operates in the niche cryogenic segment. DRDO's Director of the Technology Development Fund signed the agreement on behalf of the government in New Delhi. The agency has not disclosed the project's value, the share of the Rs 500 crore envelope the deal consumes, or a delivery timeline.

How does the TDF scheme work?

DRDO's Technology Development Fund finances industry-led R&D for defence and dual-use technologies, channelling grants to start-ups, MSMEs, and academic partners. The Rs 500 crore allocation specifically targets deep-tech and advanced technology projects, with the Zero mK agreement marking the first high-value award drawn from that expanded scope.

How does the project align with the National Quantum Mission?

DRDO framed the refrigerator as a National Quantum Mission deliverable, spanning quantum technology, advanced cryogenics, and adjacent strategic areas. Reducing dependence on imported cryogenic infrastructure sits alongside that objective. For R&D programme managers, the procurement question becomes whether a 20 mK indigenous platform can reach baseline parity with systems from Bluefors, Oxford Instruments NanoScience, or Leiden Cryogenics inside the project window.

Who oversees delivery?

The Director of DRDO's Solid State Physics Laboratory (SSPL) will monitor, mentor, and support the effort. The signing ceremony drew the Director General of Micro Electronic Devices & Computational System and Cyber Security, the Director General of Technology Management, and the SSPL Director.

What did officials say?

Defence Minister Rajnath Singh congratulated DRDO and industry participants, saying the partnership should "set a meaningful precedent for future collaborations between DRDO and industry in emerging technology fields," according to India Blooms reporting cited by The Quantum Insider. Defence Secretary and DRDO Chairman Rajesh Kumar Singh also congratulated the teams.

What remains unverified

The available reporting omits a completion date, the prototype-to-production pathway, and benchmark metrics such as cooling power at 20 mK, base-temperature stability, and cooldown duration. R&D managers weighing a future procurement will need those figures before the system can credibly replace incumbent cryogenic suppliers.

If Zero mK India delivers a working 20 mK platform under SSPL supervision, the deal becomes a template for the remaining TDF drawdowns and a measurable test of whether India's deep-tech start-up base can shoulder strategic cryogenic infrastructure.