Rather than adding thousands of tiny antennas to control millions of electrons with magnetic waves, the research team came up with a way to use just one antenna to control all the qubits in the chip by introducing a crystal called a dielectric resonator. Late last year the same team at UNSW Sydney solved a technical problem that had stumped engineers for decades on how to manipulate millions of qubits without generating more heat and interference. Making the task even more challenging is the fact that working quantum computers of the future will need to keep track of the values of millions of qubits if they are to solve some of humanity’s biggest challenges, like the search for effective vaccines, modelling weather systems and predicting the impacts of climate change. The concept of extending coherence was already confirmed experimentally by quantum engineers at UNSW in 2016. When spin qubits stop spinning, the calculation collapses and the values represented by each qubit are lost. In quantum computing, the more you can keep spins in motion, the better the chance that the information can be maintained during calculations. “The coherence time is basically telling you how long you can do all of the operations in whatever algorithm or sequence you want to do before you've lost all the information in your qubits.” “Longer coherence time means you have more time over which your quantum information is stored – which is exactly what you need when doing quantum operations,” says PhD student Ms Amanda Seedhouse, whose work in theoretical quantum computing contributed to the achievement.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |