This list contains
quantum processors, also known as quantum processing units (QPUs). Some devices listed below have only been announced at press conferences so far, with no actual demonstrations or scientific publications characterizing the performance.
Quantum processors are difficult to compare due to the different
architecture
Architecture is the art and technique of designing and building, as distinguished from the skills associated with construction. It is both the process and the product of sketching, conceiving, planning, designing, and construction, constructi ...
s and approaches. Due to this, published physical
qubit
In quantum computing, a qubit () or quantum bit is a basic unit of quantum information—the quantum version of the classic binary bit physically realized with a two-state device. A qubit is a two-state (or two-level) quantum-mechanical syste ...
numbers do not reflect the performance levels of the processor. This is instead achieved through the number of
logical qubits or benchmarking metrics such as
quantum volume,
randomized benchmarking or circuit layer operations per second (CLOPS).
Circuit-based quantum processors
These QPUs are based on the
quantum circuit
In quantum information theory, a quantum circuit is a model for quantum computation, similar to classical circuits, in which a computation is a sequence of quantum gates, measurements, initializations of qubits to known values, and possibly o ...
and
quantum logic gate
In quantum computing and specifically the quantum circuit model of computation, a quantum logic gate (or simply quantum gate) is a basic quantum circuit operating on a small number of qubits. Quantum logic gates are the building blocks of qua ...
-based
model of computing.
Annealing quantum processors
These QPUs are based on
quantum annealing, not to be confused with digital annealing.
Analog quantum processors
These QPUs are based on analog Hamiltonian simulation.
See also
*
Quantum programming
*
Timeline of quantum computing and communication
References
{{Quantum information
Quantum computing
quantum processors