Qarakal Quantum's new Pangaea architecture needs only one-tenth the physical qubits of competing designs, the Israeli startup said this week. It unveiled a "quantum bus" aimed at breaking monolithic superconductor stacks into modular, Von Neumann-style systems.

The company, founded in Israel in 2024, says the bus acts as a universal interface for quantum information. It lets logical qubits running different error-correction codes coexist without sitting physically next to each other. Fewer qubits means less wiring, lower energy draw, and less noise.

"Quantum computers are computers, not a pile of qubits that you make and then hope that by some sort of magic programming it will converge to a full computational system," co-founder and CTO Nadav Katz told The Next Platform.

What problem does the quantum bus solve?

Current superconducting rigs are complex monoliths. Every qubit performs every function, so logic, communication, and error correction collide on the same chip. Scaling means replicating the whole layout. Memory, logic, and storage can't grow independently.

Pangaea borrows the classical playbook. Motherboards, backplanes, and buses untangled processors from memory and peripherals in the 1940s and 50s. Qarakal argues quantum computing has reached the same inflection point — eighty years late to the Von Neumann lesson.

What does the bus actually do?

It routes quantum information between modules that don't need physical adjacency. Each module can run its own error-correction code, high-density memory or lightweight fast-operation, without forcing the rest of the system to match.

Director of quantum software Sheir Yarkoni puts the trade-off in plain terms: "If you have a unit that has a high density of memory and slower operations — like a hard disk — and another code that's very lightweight with fast operations but little memory — like RAM — then we don't want to build a computer where you have to choose between those."

Mix them. Let the bus bridge them. That is the bet.

Why a 10x qubit reduction?

In monolithic designs, most qubits shuttle information around rather than run real computations. Katz says that overhead drags down the error-correction threshold and pushes fault tolerance further out. With the bus, more logical operations come from each qubit on the chip. The system converges to fault tolerance faster.

Yarkoni adds that slower error accumulation lets the logical qubits themselves shrink — less overhead per stored bit of quantum information. Fewer qubits and smaller logical qubits compound into less wiring, lower energy draw, and less noise across the cryostat.

Where does Pangaea sit in the broader race?

Qarakal is one of several vendors pushing modular quantum architectures. D-Wave scientists are working on dual-rail superconducting designs. QuiX Quantum recently rolled out its Dedalo architecture alongside the Carina commercial photonics system. Qarakal, founded in 2024, is betting its superconducting stack can keep pace.

What is the deployment roadmap?

Pangaea is the first leg of a three-phase plan:

• 2025: integrate components and capabilities
• 2028: deploy systems
• 2030: expand those systems

The 2028 target is Qarakal's own roadmap, not analyst projection. Reaching it with a fault-tolerant machine small enough for a single datacenter rack would put pricing pressure on D-Wave and QuiX Quantum — assuming the 10x qubit efficiency survives contact with real hardware.