TechnologyJohn Preskill has been guiding the growing quantum computing industry for decades, and now he has set a new challenge to build a device capable of a million quantum operations per second, or a megaquop 11 February 2025 John Preskill has set a challenge for the quantum computing industryGregg SegalThe past decade has seen significant advances and investment in quantum computing, and yet the devices we have today essentially have no practical purpose. That is down to two main reasons the first being that the qubits, or quantum bits, that make up todays machines still struggle with noise, or errors, that we are only just learning to correct. The second is that devices that could solve practical problems are expected to require many more qubits than even the biggest quantum computers currently have.In 2018,