Experiments with the D-Wave Prototype
Quantum annealing is an optimization method designed to take advantage of quantum phenomena, such as quantum superposition, tunneling and quantum fluctuations. Diabatic transactions between energy levels, and thermal excitations and relaxation, can play an important role in quantum annealing (as opposed to adiabatic quantum computation). DWave has implemented a physical quantum annealing prototype with up to 512 qubits. The decoherence time scale in this device is much shorter than the annealing time. I will review recent work done in this prototype. On the one hand, we find evidence of entanglement within eight superconducting flux qubits. On the other hand, we find no evidence of a quantum speedup for the case of random Ising glasses when the entire data set is considered, and obtain inconclusive results when comparing subsets of problems on an instance-by-instance basis. I will present preliminary new results on correlations between the DWave prototype and several high level numerical models.
Host: Chris Monroe
Subscribe to A Quantum Bit
Quantum physics began with revolutionary discoveries in the early twentieth century and continues to be central in today’s physics research. Learn about quantum physics, bit by bit. From definitions to the latest research, this is your portal. Subscribe to receive regular emails from the quantum world. Previous Issues...
Sign Up Now
Sign up to receive A Quantum Bit in your email!