The qubits of known quantum computers cannot be regarded as equivalent due to the production process; rather, a standard quantum computer has high-performance qubits with long decoherence times and good operational quality levels and has low-performance qubits with short decoherence times and poor operational quality levels. …

Quantum mechanical systems, such as for instance electronic states in molecules or solid bodies, can be simulated using quantum computers. However, at present quantum computers only provide a limited quantity of qubits for the calculation. This deficiency is attributable to unsolved problems in connection with inherent noise and scalability, with the result that quantum computers currently only enable simulations of small quantum systems. …

It is already known that quantum computers can be used to simulate materials and molecules. However, quantum computers are error-prone and exhibit intrinsic noise, which has so far made the real technical application of quantum computers impossible.
Approaches are already known from the prior art which, despite the error susceptibility, allow meaningful simulations of quantum mechanical systems to be created, but the errors still exist. …

A method for simulating a noisy spin system using a quantum computer, wherein a real spin system is based on an abstract quantum spin system and at least one physical parameter to be determined is mapped to the abstract quantum spin system. It is characterized by the fact that a simulation algorithm for the abstract quantum spin system is created and the decoherence rates and the corresponding coupling operators of all available qubits of a quantum computer are determined, …