Here’s a nice article about it

https://steveblank.com/2024/10/22/quantum-computing-an-update/

Summary –

• There’s been incremental technical progress in making physical qubits
• There is no clear winner yet between the seven approaches in building qubits
• Reminder – why build a quantum computer?
• How many physical qubits do you need?
• Advances in materials science will drive down error rates
• Regional research consortiums
• Venture capital investment FOMO and financial engineering

We talk a lot about qubits in this post. As a reminder a qubit – is short for a quantum bit. It is a quantum computing element that leverages the principle of superposition (that quantum particles can exist in many possible states at the same time) to encode information via one of four methods: spin, trapped atoms and ions, photons, or superconducting circuits.

https://blog.google/technology/research/google-willow-quantum-chip/

Google: Our new chip demonstrates error correction and performance that paves the way to a useful, large-scale quantum computer

Today I’m delighted to announce Willow, our latest quantum chip. Willow has state-of-the-art performance across a number of metrics, enabling two major achievements.

• The first is that Willow can reduce errors exponentially as we scale up using more qubits. This cracks a key challenge in quantum error correction that the field has pursued for almost 30 years.