#caltechquantumcomputing

CalTech Quantum Computing

By breaking the record with their 6,100-Qubit array, Caltech physicists enable powerful quantum computers.

Caltech has produced the most qubits, advancing the race to construct powerful quantum computers. Atom Computing's 1,180 qubit record was surpassed by 6,100. Create large-scale, error-corrected quantum computers that can address problems traditional machines cannot.

Manuel Endres, a Caltech physics professor and research principal scientist, said neutral-atom quantum computing is interesting. Massive error-corrected quantum computers are now possible. Basics are covered.

Modern Scale and Quality

Superposition, the ability of a qubit to exist in two states at once, gives quantum computers their power. For this reason, they can perform complex computations faster than ordinary computers. Because of their quantum fragility, qubits are prone to mistakes. For error correction, future quantum computers must be massive with hundreds of thousands of redundant qubits.

The Caltech invention solves this difficulty. The grid of 6,100 neutral caesium atoms, frozen to practically absolute zero, functions as qubits. Using “optical tweezers” to trap and manipulate atoms in a vacuum chamber. A single laser was divided into 12,000 tweezers to secure 6,100 atoms.

According to Caltech graduate student Hannah Manetsch, who co-led the research, “On the screen, it can actually see each qubit as a pinpoint of light.” "It's a striking visualisation of large-scale quantum hardware".

The team demonstrated that this massive scale expansion did not compromise qubit quality. Quantum computing is hindered by system precision that decreases with size. In coherence, the Caltech array maintained its quantum states for over 13 seconds, nearly 10 times longer than similar arrays. Additionally, the scientists performed qubit manipulation with 99.98 percent precision.

“It’s commonly believed that accuracy suffers when working on a large scale with more atoms, but findings demonstrate that it can achieve both,” said graduate student Gyohei Nomura, who co-led the study. Poor qubits are worthless. With quality and quantity.

Neutral-Atom Promise

Superconducting circuits and trapped ions are being created in a global race to scale up quantum computers. Success by Caltech shows the neutral-atom strategy's advantages.

One key feature is the ability to shift superposed qubits throughout the array. Compared to static, hard-wired platforms like superconducting qubits, the scientists shuttled atoms hundreds of micrometres, a vital function for better error correction. Mr. Manetsch compared this precise effort to racing with a glass of water balanced so it doesn't splash.

Field peers have lauded this mobility and scalability. The discovery was called “an amazing demonstration of the simple scaling that neutral atoms have to offer” by Atom Computing's Ben Bloom. Although researchers say more testing is needed before the arrangement can be called a quantum computer, the achievement is optimistic that neutral atom systems can be made very large.

Error Correction and Much More

The qubits are suitable for calculations, but the team has not yet calculated them. New quantum error correction at this scale is the next big step. "For us to actually do calculations of value, quantum computers will need to encode information in a way that's tolerant to errors," said third research co-lead Elie Bataille.

The scientists seek to connect qubits in quantum entanglement, where they align and behave as a single entity. Entanglement must be present for the computer to do quantum computations rather than just store data. Entanglement controls matter, thus quantum computers can mimic nature.