What is the foundational concept behind cross-entropy benchmarking (XEB) and how is it used to measure the fidelity of quantum circuits?
Cross-entropy benchmarking (XEB) is a pivotal technique employed in the realm of quantum computing to evaluate the fidelity of quantum circuits, particularly in the context of demonstrating quantum supremacy. The foundational concept behind XEB revolves around the comparison of experimentally obtained probability distributions with theoretically predicted distributions for a quantum circuit, typically a random circuit.
What is the primary objective of utilizing Google's Bristlecone quantum processor?
The primary objective of utilizing Google's Bristlecone quantum processor is to achieve quantum supremacy, a milestone where a quantum computer can perform a computation that is infeasible for classical computers. Quantum supremacy represents a significant leap in computational capability, providing a foundation for advancements in various fields, including cryptography, material science, and artificial intelligence. Quantum
Has quantum supremacy been achieved in universal quantum computation?
Quantum supremacy, a term coined by John Preskill in 2012, refers to the point at which quantum computers can perform tasks beyond the reach of classical computers. Universal quantum computation, a theoretical concept where a quantum computer could efficiently solve any problem that a classical computer can solve, is a significant milestone in the field
What are the limits of quantum computers and what are the problems that cannot be solved quickly even with quantum computers?
Quantum computers, a field of study within quantum information science, have garnered significant attention due to their potential to solve certain problems more efficiently than classical computers. However, it is important to understand that quantum computers also have limitations and there are problems that cannot be solved quickly even with the use of quantum algorithms.