Contents
What is the depth of a quantum circuit?
1 Answer. The depth of a circuit is the longest path in the circuit. The path length is always an integer number, representing the number of gates it has to execute in that path. if you look at the second qubit, there are 3 gates acting upon it.
What quantum means?
Quantum is the Latin word for amount and, in modern understanding, means the smallest possible discrete unit of any physical property, such as energy or matter. Quantum came into the latter usage in 1900, when the physicist Max Planck used it in a presentation to the German Physical Society.
What is the volume of a quantum computer?
Quantum volume is a metric that measures the performance of a quantum computer ‘s capabilities and error rates. IBM’s quantum computer Raleigh, achieved a score of 32 in January 2020. In August 2020 IBM announced it had achieved a volume of 64 in a 27-qubit system. Quantum computers are difficult to compare.
Why did IBM use the quantum volume metric?
IBM introduced the Quantum Volume metric because a classical computer’s transistor count and a quantum computer’s quantum bit count aren’t the same. Qubits decohere with a resulting loss of performance so a few fault tolerant bits are more valuable as a performance measure than a larger number of noisy, error-prone qubits.
Which is the highest quantum volume ever achieved?
In 2020, the highest achieved quantum volume (per § IBM’s modified definition) rose from 32 for IBM ‘s computer “Raleigh” to 128 for Honeywell ‘s “H1”, i.e. quantum circuits of size up to 7×7 have been implemented successfully. More recently in 2021, Honeywell ‘s “H1”, achieved a measured quantum volume of 512.
How many qubits are in Honeywell quantum volume?
Achievement history Date Quantum volume (circuit size) Manufacturer Notes 2020, June 64 (6×6) Honeywell 6 qubits 2020, August 64 (6×6) IBM 27 qubits 2020, November 128 (7×7) Honeywell “System Model H1” (10 qubits) 2021, March 512 (9×9) Honeywell “System Model H1” (10 qubits)