What can quantum computers do that classical computers Cannot?
However, a classical computer can only be in one of these one billion states at the same time. A quantum computer can be in a quantum combination of all of those states, called superposition. This allows it to perform one billion or more copies of a computation at the same time.
Can quantum computing solve classically unsolvable problems?
Abstract: T. D. Kieu has claimed that a quantum computing procedure can solve a classically unsolvable problem. Recent work of W. D. Kieu announced that a quantum computing procedure could solve a classically unsolvable problem, namely Hilbert’s Tenth Problem.
Why won’t quantum computers replace classical computers?
The short answer is no. Classical computers have unique qualities that will be hard for quantum computers to attain. The ability to store data, for example, is unique to classical computers since the memory of quantum computers only lasts a few hundred microseconds at most.
Can quantum computers solve P NP?
Quantum computers can solve NP-hard problems that classical computers are unable to solve. Currently, the two most important and notable complexity classes are “P” and “NP.” P represents problems that can be solved in polynomial time by a classical computer.
Will quantum computers solve everything?
Quantum computers can solve NP-hard problems that classical computers are unable to solve. They also proved that P is a subset of BQP- that a quantum computer can solve all problems that a classical computer can solve. They also defined another class of problems called PH or “Polynomial Hierarchy”.
Is a quantum computer faster than a classical computer?
If both computers were equal in speed and size, the quantum computer would solve the problem faster. However, a classical computer might compensate for the larger number of steps by its sheer speed and size. But with the increasing complexity of the problem to solve, speed and size will not suffice anymore.
What problems can be solved with a quantum computer?
Cryptographic problems that use factoring are excellent examples of problems that can be solved with a quantum computer because both the input and output are each a single number. Note that the numbers used in the key are huge, so a significant amount of qubits are needed to calculate the result.
Is a quantum algorithm faster than a classical algorithm?
By that, we mean the quantum algorithm will solve a problem in fewer steps than a classical algorithm requires. If both computers were equal in speed and size, the quantum computer would solve the problem faster. However, a classical computer might compensate for the larger number of steps by its sheer speed and size.
Is machine learning a good fit for a quantum computer?
Because of this, machine learning problems often don’t make for a perfect fit because of the large amount of input data. However, optimization problems are a type of machine learning problem that can be a good fit for a quantum computer.