QuamCore Ltd, a startup working to develop a quantum computer with one million qubits, today announced that it has raised $26 million in early-stage funding.

Sentinel Global led the Series A round with participation from Arkin Capital and several returning backers. The investment brings QuamCore’s outside funding to $35 million.

The largest quantum chips manufactured to date have fewer than 1,500 qubits, which limits their computing capacity. One of the main reasons researchers struggle to add more qubits is that most quantum chips must be kept in cryogenic refrigerators. Those refrigerators, in turn, have a limited amount of space.

Qubits take up a relatively small portion of the space available in the fridge that houses them. The rest is used by cables that connect the qubits to the outside world. The more qubits there are in a quantum computer, the more cables are needed.

Tel Aviv-based QuamCore has developed a quantum computer architecture that promises to reduce cabling requirements by a factor of more than 1,000. According to the company, its technology will make it possible to place one million qubits in a single cryogenic fridge. QuamCore says that the architecture is “fully designed and simulated.”

A quantum computer’s qubits are managed by a control chip that usually runs outside the fridge. The cables inside the fridge are used to transmit data between the control chip and the qubits. According to QuamCore, its architecture reduces cabling requirements by integrating qubit control components directly into the fridge.

Intel Corp. is taking a similar approach with its Pando Tree device. Introduced last year, Pando Tree is a qubit control chip that can be installed inside a quantum computer’s cryogenic fridge. That makes it possible to place the chip on the same circuit board as the qubits it manages, which reduces the need for cabling.

QuamCore’s quantum computer architecture uses qubits made of superconducting materials. This arrangement makes it possible to manufacture the circuits using standard chipmaking equipment, which reduces production costs. Additionally, superconducting qubits can perform some processing tasks faster than other types of quantum circuits.

“We chose to radically rethink the architecture of the most mature and performant platform: superconducting qubits,” said QuamCore Chief Executive Officer Alon Cohen (pictured, center, with co-founders Shay Hacohen-Gourgy and Serge Rosenblum). “The result is a blueprint that can scale, stay compact and remain aligned with where the industry is already headed.”

QuamCore will use the proceeds from its funding round to manufacture its first-generation quantum chips. The company also plans to launch a new quantum lab that will support research initiatives. 

Photo: QuamCore

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