Quantum Simulation of Dissipative Collective Effects on Noisy Quantum Computers

Dissipative collective effects are ubiquitous in quantum physics, and their relevance ranges from the study of entanglement biological systems to noise mitigation computers. Here, we put forward first fully simulation dissipative phenomena on a real computer, based recently introduced multipartite collision model. First, theoretically accuracy this algorithm near-term computers with noisy gates, derive some rigorous error bounds that depend timestep model gate errors. These can be employed estimate necessary resources for efficient dynamics. Then, implement IBM simulate superradiance subradiance between pair qubits. Our experimental results successfully display emergence simulation. In addition, analyze properties gates employ by means full process tomography, aim improving our understanding errors devices currently accessible worldwide researchers. We obtain values average fidelity, unitarity, incoherence diamond error, establish connection them experimentally simulated state. Moreover, build tomography two-qubit show its performance is comparable provided IBM. Finally, observe scaling as function number favorable, but at same time reaching threshold fault tolerant computation may still orders magnitude away employ.