![]() On a classical computer, these same problems require the circuit depth to grow larger as inputs increase.įirst, we would need millions and millions of extremely high quality qubits with low error rates and long coherence time for this to work. Scientists prove there are certain problems that require only a fixed circuit depth when done on a quantum computer, no matter how the number of inputs increases. However, people skip several elements of the fine print. This is getting a lot of attention because some people are getting concerned that we may be able to break prime-factor-based encryption like RSA much faster on a quantum computer than the thousands of years it would take using known classical methods. In 1994 Peter Shor formulated his eponymous algorithm that demonstrated how to factor integers on a quantum computer almost exponentially faster than any known method on a classical computer. Proving something mathematically is not just making a lot of observations and saying, “it seems likely that such and such is the case.” Is quantum computing just a flashy new alternative to the “classical” computers that are our smartphones, laptops, cloud servers, high performance computers, and mainframes?Ĭan they really perform some calculations faster than classical computers can? How do you characterize those areas where they can or potentially can do better? Can you prove it?Īh, proof. ![]() ![]() Since then, over 100,000 people have themselves directly used the no-charge IBM Q Experience and created software using the open source Qiskit quantum computing software development framework. Quantum computing is getting a significant amount of attention these days, especially since IBM put a real 5-qubit machine online in May 2016. Scientists Sergey Bravyi of IBM Research, David Gosset of the University of Waterloo’s Institute for Quantum Computing, and Robert König of the Institute for Advanced Study and Zentrum Mathematik, Technische Universität München, have published in Science as “Quantum advantage with shallow circuits.”
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