BITS Pilani team designs quantum algorithm beating classical computers in 20 seconds: Researcher Indrakshi Raychowdhury

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A quantum computer just did in 20 seconds what took a classical machine 2 hours.

No contrived party trick.

A real physics problem.

And the scientist behind it isn't in Silicon Valley or MIT.

She's in Goa.

Meet Dr. Indrakshi Raychowdhury, associate professor at BITS Pilani.

Her team just did something no Indian lab has ever done before.


🧠 The problem that breaks classical computers

Quarks. Gluons. The strong nuclear force.

Particles inside a proton, mutually shoving each other in real time.

Classical computers can snapshot them fine.

But watching them move, frame by frame?

Exponentially hard.

So her team flipped the script.

They used a quantum computer to imitate a quantum system.

  • ⚛️ 120 qubits on an IBM processor
  • ⏱️ 20 seconds on the quantum machine
  • 🐌 2 hours on a classical one

⚡ Here's the twist nobody saw coming

Quantum computers are terrible at simple arithmetic.

Adding two numbers? Painfully slow.

But simulating a chaotic, interacting quantum system?

That's exactly where they shine.

"That is highly counterintuitive," she said, "but it is where quantum advantage lies."


🎯 The real test wasn't the computer. It was the judge.

Enter the Quantum Advantage Tracker — IBM's watchdog, launched November 2025.

Submit a result. A committee tries to break it, on classical and quantum machines.

Stricter than peer review.

  • 📋 220+ claims logged
  • ✅ Only around a dozen accepted
  • 🔥 A handful still marked "active"

Her result is one of them.

The first ever from an Indian lab.


🌍 What happens next

CERN has taken notice.

She's headed to Switzerland next month, invited to see if her method can push their simulations further.

And the algorithm was built to travel.

"If someone gave me a 1,000-qubit computer today, our algorithm would scale to it seamlessly," she says.

Here's the part that stings a little.

India's National Quantum Mission has ₹6,003 crore behind it.

But India still doesn't own a high-end quantum computer.

Every run happened over the cloud, on IBM's hardware, from a desk in Goa.

No lab. No supercomputer. Just an algorithm.

Turns out, the hardware was never the hard part.

That's all for now!