Atomic Cubit completes simulation of its first four-qubit superconducting chip.
Design and full-chip electromagnetic simulation are complete. Fabrication is the next stage.
Company technology update · PDF · 3 pagesWhy we exist
Design and build India’s quantum chip —
and everything that will run on it.
Atomic Cubit builds the processor, the software that runs it, and the chemistry it unlocks — one foundation, one company.
01 · The ledger
What we’ve measured
Explore measurements, conditions and supporting records.
See the ledger
02 · The method
How we’re building it
Measure first. Design for the code. Build in India.
Read the approach
03 · The company
Who we are
Two founders building toward a full-stack fault-tolerant quantum computer.
About the company
Investment partners
Vedanshu Investments
Support partners
Atomic Cubit, by the numbers
99.94%1
Post-selected logical Bell-state fidelity, measured in three bases
621
Logical qubits certified in a single run — 31 independent encoded pairs
100×2
Lower logical error at code distance 9 than distance 3, at low noise — in simulation
8/83
Comparisons where logical error fell at larger code distance: Google’s public data, open-source decoder
2.1 vs 2.144
Suppression factor: calibrated simulation of Google’s processor alongside its published result
0 SWAPs2
The surface code lands natively on our target lattice
1 Encoded-pair measurements on IBM Heron-class processors, post-selected, 2026. Acceptance rates and job IDs: the ledger.
2 Circuit-level simulation, Stim — minimum-weight matching.
3 Offline analysis of 17 configurations from Google Quantum AI’s public surface-code dataset using PyMatching. Eight comparisons across distances 3, 5 and 7, two bases, and 13 and 30 rounds. Analysis details.
4 Google-processor simulation calibrated to its published distance-7 error rate: 2.11 ± 0.03, alongside the published 2.14 ± 0.02. Model summary.
News
Atomic Cubit & Quantamathical
Featured inHyderabad’s Quantum Leap: How Atomic Cubit and Quantamathical Are Shaping Science’s Next Frontier
Prime Postprimepost.news
Read our story
Building quantum technology from India.
Prime Post features the founders of Atomic Cubit and Quantamathical, our Nandi Q1 processor design, and our vision for quantum computing and computational drug discovery.
See company news →Research
The Chemistry Performance Envelope.
Circuit resources, energy prediction and conditional processor budgets for quantum chemistry.
Research preprint · 18 September 2026.
Read the paper and supporting materials →What we believe
“Measure first. Then design.”
The method
“The chip worth building is written in the errors of the machines that already exist.”
The conviction
“We build the foundation — and everything that runs on it.”
The company
“I want India to be a place that builds these machines, not only a place that uses them.”
Founder