Analog computing

Once a Hamiltonian is encoded and the Schedule is converted to a Job, one can perform a simulation by sending this Job to a dedicated analog QPU.

myQLM is equipped with such a simulator - QutipQPU.

• QutipQPU is based on the QuTiP library. It can simulate the evolution of Bosonic Hamiltonians (i.e. more than 2-level systems) in the presence (or not) of qubits, Fermionic Hamiltonians, as well as Hamiltonians with stochastic noise with an arbitrary user-specified Power Spectral Density (PSD).

The analog QPU above is able to measure more than one Observable per simulation. One can achieve this by passing a list of the other desired observables to be measured to the observables argument of the to_job() method of the Schedule. Together with the final expectation values \(\left<O\right>(t_{f})\) provided in the Result fields value and values (for one and many observables, respectively), one can also access \(\left<O\right>(t)\), i.e. the measured values at all times via value_data and values_data.

We provide some of the key applications of analog quantum computations:

• Variational Quantum Simulation with analog QPUs