DRDO inks first high-value deep tech project agreement with a start-up under TDF scheme for indigenous development of 20 mK Dilution Refrigerator for Quantum Applications

1. At a Glance

• DRDO signed its first high-value deep-tech project agreement under the Technology Development Fund (TDF) scheme with the start-up Zero mK India Private Limited (Alwar, Rajasthan). The aim is indigenous development of a 20 mK Dilution Refrigerator for Quantum Applications. [1]
• Dilution refrigerators are specialised cryogenic systems that reach the millikelvin range. Several quantum computing platforms need this ultra-low-temperature environment for operation and testing. [1]
• The project aligns with the National Quantum Mission. It aims to reduce dependence on imported cryogenic infrastructure and build a self-reliant, quantum-ready ecosystem. [1]
• Why it matters: it is a template for DRDO–start-up collaboration in emerging technologies, and it links defence R&D, quantum technology and Atmanirbharta. [1]

2. Why in the News

• On 24 Sep 2026 (PIB release), the agreement was signed in New Delhi between Director, TDF and Zero mK India Pvt Ltd. [1]
• It is the first high-value agreement under the Rs 500 crore corpus. Raksha Mantri Rajnath Singh had earlier approved this corpus for deep-tech and cutting-edge projects. [1]
• Rajnath Singh complimented DRDO and industry. He said the partnership would set a precedent for future DRDO-Industry collaborations in emerging technology domains. [1]

3. Background & Evolution

• Driving rationale: reduce dependence on imported cryogenic infrastructure and strengthen the domestic quantum technology ecosystem. [1]
• Milestones:
• The Rs 500 crore corpus for deep-tech projects was approved earlier by the Raksha Mantri; the release gives no date. [1]

• The first agreement under the corpus was signed on 24 Sep 2026. [1]

• Not covered by retrieved sources: TDF's founding year and budget, and National Quantum Mission details. Verify these separately before using them.

4. Core Static Facts

Item	Fact
Scheme	Technology Development Fund (TDF) [1]
Parent body	DRDO, Ministry of Defence [1]
Start-up	Zero mK India Private Limited, Alwar, Rajasthan [1]
Product	20 mK dilution refrigerator for quantum applications [1]
Signatories	Director, TDF, and Zero mK India Pvt Ltd; signed in New Delhi [1]
Funding corpus	Rs 500 crore for deep-tech and cutting-edge projects [1]
Monitoring and mentoring	Director, SSPL (Solid State Physics Laboratory) and team [1]
Officials present	DG MCC (Micro Electronic Devices & Computational System and Cyber Security); DG TM (Technology Management); Director, SSPL [1]
Defence Secretary and DRDO Chairman	Rajesh Kumar Singh [1]
Related national programme	National Quantum Mission [1]

5. Multi-Dimensional Analysis

Scientific / Technological

• Millikelvin cryogenics is an enabling infrastructure for quantum computing platforms and associated quantum technologies. [1]
• The project builds capability in advanced cryogenics and strategic technologies. [1]

Geopolitical / Strategic

• Reduces reliance on imported cryogenic infrastructure, which supports strategic autonomy in quantum technology. [1]
• The link to strategic technologies suggests defence relevance. [1]

Economic

• Start-up participation through a dedicated Rs 500 crore corpus channels public R&D funds to private deep-tech firms. [1]
• Import substitution strengthens the domestic quantum ecosystem. [1]

Administrative / Governance

• The project has a defined mentoring structure: SSPL monitors, mentors and supports it. [1]
• Senior leadership of DRDO, including DG MCC and DG TM, was present at the signing, indicating institutional priority. [1]

6. Recent Developments (last 12-18 months)

• 24 Sep 2026: first high-value deep-tech agreement under TDF signed with Zero mK India Pvt Ltd. [1]
• Date not stated: Raksha Mantri approved the Rs 500 crore corpus for deep-tech projects. [1]

7. Prelims Hooks

• The agreement is the first high-value deep-tech project under DRDO's TDF scheme. [1]
• The start-up is Zero mK India Private Limited, based in Alwar, Rajasthan. [1]
• The target is a 20 mK dilution refrigerator for quantum applications. [1]
• Dilution refrigerators achieve the millikelvin temperature range. [1]
• The corpus is Rs 500 crore, approved by Raksha Mantri Rajnath Singh. [1]
• The agreement was signed between Director, TDF and the start-up in New Delhi. [1]
• The project is monitored and mentored by SSPL. [1]
• It aligns with the National Quantum Mission. [1]
• The parent ministry is Defence, not MeitY or DST. [1]
• The Chairman, DRDO is also Secretary, Department of Defence R&D. [1]

8. Sanctioning Money Is the Easy Part — Delivery Is Where TDF Is Tested

• TDF gives money as a grant, not as an order
• TDF is a grant-in-aid scheme: DRDO pays the firm to develop a technology India does not yet have [2].
• A grant pays for the building. It does not promise that anyone will buy the finished machine.

• So a project can be a technical success and still end with one working prototype and no factory.

• The scheme is still small when you look at money actually spent

• As of June 2026, 80 TDF projects were running, worth Rs 334 crore in total [3].
• That is an average of about Rs 4 crore per project — even though the ceiling per project was raised to Rs 50 crore in 2022, up from Rs 10 crore [2].

• Most TDF work has therefore been small-ticket. This 20 mK dilution refrigerator is one of the first times the scheme is used for a big, hard, first-of-its-kind machine [1].

• The Rs 500 crore deep-tech corpus buys fewer projects than it sounds

• At the Rs 50 crore per-project ceiling [2], a Rs 500 crore corpus [1] can fully fund only about ten such projects.

• So this corpus is a pilot, not a national programme. The test is whether these few projects finish.

• Watch the handover step, not the signing step

• DRDO has publicly handed over TDF-developed technologies to the armed forces — one such event covered seven technologies [6].
• Signing ceremonies get press releases. Handover is the number that tells you the scheme works. Use handover counts in an answer, not sanction counts.

9. A Fridge Is Only One Layer of a Quantum Computer

• The refrigerator is the room, not the machine
• A dilution refrigerator gives the cold environment. The qubits (the basic units of a quantum computer) still have to be made, wired and controlled [1].
• You also need the chip fabrication, the very low-noise control electronics and the cables that carry signals into the cold zone.

• Making the fridge in India removes one import. It does not make the computer Indian.

• The National Quantum Mission itself treats this as four separate problems

• NQM was approved on 19 April 2023 with Rs 6,003.65 crore for 2023-24 to 2030-31 [4].
• It set up four Thematic Hubs (T-Hubs) — quantum computing, quantum communication, quantum sensing and metrology, and quantum materials and devices — with 14 Technical Groups, 152 researchers from 43 institutions [5].

• Cryogenics sits under materials and devices. Computing is a different hub. A student who says "this fridge delivers the quantum computer" has merged four workstreams into one.

• Measure the project against NQM's own targets

• NQM aims for machines of 20-50 physical qubits in 3 years, 50-100 in 5 years and 50-1000 in 8 years [4].
• The 1000-qubit end needs many refrigerators, not one. Domestic supply matters only if it can be repeated at scale and on time.

10. Who Will Buy the Second One?

• The problem is the market, not the science
• India's quantum users are a small set: the four NQM T-Hubs, some IITs and DRDO labs [5].
• A firm that builds one refrigerator on a DRDO grant [2] then faces a home market of perhaps a few dozen units over years.

• Without repeat orders, the firm cannot bring the unit cost down, and imports stay cheaper than the Indian machine.

• What would fix it: DRDO and NQM should agree the follow-on orders now

• TDF's stated purpose is technologies "not available with the Indian defence industry" [2] — it funds development, while buying is a separate decision taken later by users.
• Action: DRDO and the NQM T-Hubs should commit, in advance, to sourcing their next cryostats from the qualified Indian unit once it passes test — the same logic the Positive Indigenisation Lists use, where an assured closed market is what makes a private firm invest in a production line.

• Action: SSPL, which mentors this project [1], should publish the acceptance test standard early, so the start-up builds to a known bar instead of a moving one.

• Export is the only other way out

• The world market for millikelvin cryostats is small and specialised.
• If the Indian machine cannot be sold abroad, the line survives only on government demand. Say this plainly in an answer — it is the real limit on Atmanirbharta in niche instruments.

11. The Case for Just Importing It — and Why Building Is Still Worth It

• The strongest argument against this project
• Dilution refrigerators are already sold by a few established foreign firms. India can buy one tomorrow.
• Building one takes years of engineering for a machine that is a tool, not a weapon. That money could instead buy several imported units and put researchers to work now.

• India is behind on qubit counts already [4]. Spending time on the support equipment can slow the actual science.

• What is right in that argument — concede it

• On pure cost and speed, importing wins. That is true, and an honest answer should say so.

• Nothing in the PIB release promises the Indian unit will be cheaper than an imported one [1].

• Why building still makes sense

• Supply, not price, is the risk. The stated reason for the project is dependence on imported cryogenic infrastructure [1]. A handful of foreign suppliers means long waiting lists and no control over delivery dates.
• Defence use changes the calculation. The buyer here is DRDO, under the Ministry of Defence [1]. For a system tied to strategic work, an imported machine that needs foreign service engineers is a standing dependency.
• The bet is small and capped. Rs 500 crore for deep tech [1] is under a tenth of NQM's Rs 6,003.65 crore [4]. India is not choosing between the fridge and the science; it is spending a small share on removing one choke point.

12. Anchors for Answers

• Data: National Quantum Mission — Rs 6,003.65 crore, 2023-24 to 2030-31, approved 19 April 2023 [4]
• Data: NQM targets 20-50 physical qubits in 3 years, 50-100 in 5 years, 50-1000 in 8 years [4]
• Data: 80 TDF projects worth Rs 334 crore under implementation as of June 2026 [3]
• Data: TDF per-project funding ceiling raised to Rs 50 crore from Rs 10 crore (2022) [2]
• Scheme: TDF is grant-in-aid to MSMEs, start-ups and academia for defence and dual-use technologies not available with Indian industry [2]
• Scheme: NQM's four T-Hubs — computing, communication, sensing and metrology, materials and devices — 14 Technical Groups, 152 researchers, 43 institutions [5]
• Comparison: Positive Indigenisation Lists work by assuring a closed domestic market; TDF funds development but carries no such purchase promise [2]

13. Mains Relevance

• GS-III: Science & Technology, covering developments and their applications and effects in everyday life; indigenisation of technology; and achievements of Indians in science and technology.
• GS-III: Defence technology and Atmanirbharta.
• Plausible questions: 1. Millikelvin cryogenics is a foundational enabler of quantum computing. Discuss India's efforts at indigenisation and the role of DRDO–start-up partnerships. 2. Evaluate the role of the Technology Development Fund in building a defence deep-tech ecosystem. 3. How can dedicated deep-tech funding reduce import dependence in strategic technologies?

14. Related Topics to Study Next

• National Quantum Mission: the policy anchor for this project.
• Technology Development Fund scheme: eligibility, funding limits and the role of start-ups and MSMEs.
• iDEX and Innovations for Defence Excellence: the other defence start-up channel.
• DRDO laboratories such as SSPL: structure and mandate.
• Quantum computing platforms: superconducting qubits and their cryogenic needs.
• Positive Indigenisation Lists: the import-substitution policy context.
• Cryogenics in India: ISRO cryogenic engines are conceptually related but a different technology.

15. Common Errors / Trap Areas

• Scheme confusion: this is TDF (DRDO), not iDEX (a Ministry of Defence initiative), and not the National Quantum Mission (a science mission).
• Temperature: the target is 20 mK (millikelvin), not 20 K (kelvin).
• "First" claim: it is the first high-value agreement under the Rs 500 crore corpus, not the first TDF project ever. [1]
• Location: the start-up is in Alwar, Rajasthan; the signing was in New Delhi. [1]
• Mentor lab: SSPL monitors the project, not a lab of ISRO or DST. [1]