The Holy Grail of Computing: Microsoft Unveils New Discovery Crucial for Quantum Computer Development

Microsoft announced last week that it has discovered a new state of matter for creating a quantum computer, thus ending a twenty-year struggle in physics that many in the quantum world dismissed as unfeasible.

The American tech giant is now on the brink of the holy grail of computing, and as they stated, the company believes this discovery will enable them to build a practical quantum computer by the end of this decade, as well as a multitude of other breakthroughs in this field.

Microsoft’s discovery is the result of years of research into a type of particle that consists of a fourth aggregate state, which is different from solid, liquid, and gas. The existence of these particles, known as Majorana fermions, was first theorized in 1937, and scientists have struggled for decades to prove that these particles actually exist. Now, Microsoft has succeeded, although scientists claimed back in 2022 that they had managed to record effects caused by these particles.

The tech giant decided to start researching these particles realizing that they are the true path to quantum computing. While bits in a traditional computer represent ones and zeros, qubits used in quantum computers can represent both digits simultaneously.

However, most types of qubits retain their quantum states for only a fraction of a second, meaning that all the information they hold is lost very quickly. To compensate for this, fully functional quantum computers will require a multitude of additional qubits to run the software necessary for error correction.

In comparison, the so-called topological qubits that Microsoft has been trying to create using Majorana particles are more resistant to errors. Information is stored throughout the qubit, meaning that even when parts fail, the topological qubit as a whole should retain enough information to be useful.

This greater stability means that Microsoft will likely need only about 100 additional qubits to correct errors for each fully operational qubit, said Jason Zander, Executive Vice President for Strategic Missions and Technologies at Microsoft. This is roughly a tenth of what is expected to be needed in machines whose qubits are based on other materials.

The latest data released by Microsoft, including work published on Wednesday in Nature, represents a significant advancement towards creating usable topological qubits. However, as reported by the Financial Times, there is still a small chance that the company’s discoveries could be explained by something other than the successful exploitation of elusive particles.

This discovery comes just weeks after Nvidia’s CEO Jensen Huang predicted that useful quantum computers are still 20 years away – much longer than companies working in the field claim.

As one sign of official U.S. interest in the ambitious technology, Darpa, the agency of the U.S. Department of Defense responsible for developing advanced technologies, has selected Microsoft this month to attempt to demonstrate that it can build a large quantum computer.

The American startup PsiQuantum, the only other company selected by Darpa, uses photon-based qubits and announced last year a $620 million project to build a full-scale quantum system in Australia.

With the latest research and data supporting its claims of mastering Majorana particles, Microsoft stated that it has created the first processor using this technology. Named Majorana 1, the chip is based on eight topological qubits. The tiny size of each component means that it will eventually be able to squeeze up to a million qubits onto each chip, creating a full-scale quantum computer, the company announced.