Abstract: Evidence for quantum annealing with more than one hundred qubits Quantum technology is maturing to the point where quantum devices, such as quantum communication systems, quantum random num...
Abstract: We establish the ultimate quantum limits to the amplification of an unknown coherent state in the realistic setting where the expected photon number is finite. Moreover, we provide the benc...
Abstract: The dynamics of large quantum systems is currently an active topic of research due to the great progress on experimental setups. These dynamics appear to often obey certain universal featur...
Abstract: We have studied the impact of low-frequency magnetic flux noise upon superconducting transmon qubits with various levels of tunability. We find that qubits with weaker tunability exhibit de...
Abstract: Feynman's "no-node" theorem states that the conventional many-body ground state wavefunctions of bosons in the coordinate representation are positive de nite. This implies that time-reversa...
Abstract: Optical detection of single defect centers in the solid state is a key element of novel quantum technologies. This includes the generation of single photons and quantum information processi...