Experimental bath engineering for quantitative studies of quantum control
arXiv:1403.4632 · doi:10.1103/PhysRevA.89.042329
Abstract
We develop and demonstrate a technique to engineer universal unitary baths in quantum systems. Using the correspondence between unitary decoherence due to ambient environmental noise and errors in a control system for quantum bits, we show how a wide variety of relevant classical error models may be realized through In-Phase/Quadrature modulation on a vector signal generator producing a resonant carrier signal. We demonstrate our approach through high-bandwidth modulation of the 12.6 GHz carrier appropriate for trapped Yb ions. Experiments demonstrate the reduction of coherent lifetime in the system in the presence of an engineered bath, with the observed scaling as predicted by a quantitative model described herein. These techniques form the basis of a toolkit for quantitative tests of quantum control protocols, helping experimentalists characterize the performance of their quantum coherent systems.
Related manuscripts at http://www.physics.usyd.edu.au/~mbiercuk/Publications.html
References in corpus (11)
- Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
- Optimized Dynamical Decoupling in a Model Quantum Memory
- How to Enhance Dephasing Time in Superconducting Qubits
- Manipulation and Detection of a Trapped Yb+ Ion Hyperfine Qubit
- Nanoscale magnetic imaging of a single electron spin under ambient conditions
- Universal quantum control of two-electron spin quantum bits using dynamic nuclear polarization
- Coherent quantum LQG control
- Exact Results on Dynamical Decoupling by -Pulses in Quantum Information Processes
- Optimal pulse spacing for dynamical decoupling in the presence of a purely-dephasing spin-bath
- Process tomography of dynamical decoupling in a dense optically trapped atomic ensemble
- Generalization of short coherent control pulses: extension to arbitrary rotations