QUANTUM ERROR CORRECTIONĬompanies building quantum computers like IBM and Google have highlighted that their roadmaps include the use of “Quantum Error Correction” as they scale to machines with 1000 or more qubits. Right now, instead of the trillions of operations that might be needed to run a full-fledged quantum algorithm, we can typically only perform dozens before noise causes a fatal error. The greater the influence of noise, the shorter the algorithm that can be run before it suffers an error and outputs an incorrect or even useless result. Noise causes the information in the qubits to become randomized - and this leads to errors in our algorithm. Now consider a quantum algorithm, executing many operations across a large number of qubits. By contrast, typical quantum bits become randomized in about one one-thousandth of a second. A typical transistor in a microprocessor can run for about a billion years at a billion operations per second, without ever suffering a hardware fault due to any form of interference. This is known as decoherence.Ĭompared with standard computers, quantum computers are extremely susceptible to noise. When qubits in a quantum computer are exposed to this kind of noise, the information in them gets degraded just the way sound quality is degraded by interference on a call. Just like a mobile phone call can suffer interference leading it to break up, a quantum computer is susceptible to interference from all sorts of sources, like electromagnetic signals coming from WiFi or disturbances in the Earth’s magnetic field. “Noise” describes all of the things that cause interference in a quantum computer. Here we’ll get to the heart of why quantum computing is really hard: noise and error. Building a universal quantum computer with millions of entangled, coherent quantum bits running complex algorithms is not going to be simple or straightforward. The journey to realizing functional quantum computers will be long and it's a path that Q-CTRL is committed to making as easy as possible for you.
0 kommentar(er)
