![horizon diamond free 2018 horizon diamond free 2018](https://i.pcmag.com/imagery/reviews/02ePddG85OpbdhLoT2tT14t-4.fit_lim.size_1050x.jpg)
National Aeronautics and Space Administration ( NASA), claimed to have performed a quantum computation that was infeasible on any classical computer, but whether this claim was or is still valid is a topic of active research. On 23 October 2019, Google AI, in partnership with the U.S. Despite ongoing experimental progress since the late 1990s, most researchers believe that " fault-tolerant quantum computing still a rather distant dream." In recent years, investment in quantum computing research has increased in the public and private sectors. In 1998 Isaac Chuang, Neil Gershenfeld and Mark Kubinec created the first two- qubit quantum computer that could perform computations. In 1994, Peter Shor developed a quantum algorithm for factoring integers with the potential to decrypt RSA-encrypted communications. Richard Feynman and Yuri Manin later suggested that a quantum computer had the potential to simulate things a classical computer could not feasibly do. Quantum computing began in 1980 when physicist Paul Benioff proposed a quantum mechanical model of the Turing machine. The study of quantum computing is a subfield of quantum information science. : I-5 Though current quantum computers are too small to outperform usual (classical) computers for practical applications, they are believed to be capable of solving certain computational problems, such as integer factorization (which underlies RSA encryption), substantially faster than classical computers. The devices that perform quantum computations are known as quantum computers. Quantum computing is a type of computation that harnesses the collective properties of quantum states, such as superposition, interference, and entanglement, to perform calculations. IBM Q System One (2019), the first circuit-based commercial quantum computer