IBM Quantum

IBM Quantum Services provides access to more than 20 currently available quantum systems (known as backends). IBM’s quantum processors are made up of superconducting transmon qubits, and users can utilize these systems via the universal, gate-based, circuit model of quantum computation. Additionally, users have access to 5 different types of simulators, simulating from 32 up to 5000 qubits to represent different aspects of the quantum backends.

Rigetti

Rigetti currently offers access to the 40-qubit Aspen-11 system, a scalable, superconducting, gate-based quantum processor, which is accessible via their Quantum Cloud Service (QCS). Rigetti also provides users with quantum computing example algorithms for optimization, quantum system profiling, and other applications.

Quantinuum

Quantinuum offers access to the Quantinuum System Model H1 family of trapped ion quantum computers and emulators, accessible via their API and User Portal.
Features include, but are not limited to:

  • N ≥ 12 qubit trapped-ion based quantum computer
  • All-to-all connectivity
  • Laser based quantum gates
  • Linear trap Quantum Charge-Coupled Device (QCCD) architecture with three or more parallel gate zones
  • Mid-circuit measurement conditioned circuit branching
  • Qubit reuse after mid-circuit measurement
  • Native gate set: single-qubit rotations, two-qubit ZZ-gates