Hermann Uys
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View article: Robust control of quantum systems by quantum systems
Robust control of quantum systems by quantum systems Open
Quantum systems can be controlled by other quantum systems in a reversible way, without any information leaking to the outside of the system-controller compound. Such coherent quantum control is deterministic, is less noisy than measuremen…
View article: Generating Greenberger-Horne-Zeilinger states with squeezing and postselection
Generating Greenberger-Horne-Zeilinger states with squeezing and postselection Open
Many quantum state preparation methods rely on a combination of dissipative quantum state initialization followed by unitary evolution to a desired target state. Here we demonstrate the usefulness of quantum measurement as an additional to…
View article: Quantum control through measurement feedback
Quantum control through measurement feedback Open
CITATION: Uys, H., et al. 2018. Quantum control through measurement feedback. Physical Review A, 97(6):060102, doi:10.1103/PhysRevA.97.060102.
View article: Noninvasive measurement of dynamic correlation functions
Noninvasive measurement of dynamic correlation functions Open
CITATION: Uhrich, P., et al. 2017. Noninvasive measurement of dynamic correlation functions. Physical Review A, 96(2):022127, doi:10.1103/PhysRevA.96.022127.
View article: Analytically exploiting noise correlations inside the feedback loop to improve locked-oscillator performance
Analytically exploiting noise correlations inside the feedback loop to improve locked-oscillator performance Open
We introduce concepts from optimal estimation to the stabilization of precision frequency standards limited by noisy local oscillators. We develop a theoretical framework casting various measures for frequency standard variance in terms of…
View article: Vibration-induced field fluctuations in a superconducting magnet
Vibration-induced field fluctuations in a superconducting magnet Open
Superconducting magnets enable precise control of nuclear and electron spins, and are used in experiments that explore biological and condensed matter systems, and fundamental atomic particles. In high-precision applications, a common view…
View article: Process tomography via sequential measurements on a single quantum system
Process tomography via sequential measurements on a single quantum system Open
We utilize a discrete (sequential) measurement protocol to investigate\nquantum process tomography of a single two-level quantum system, with an\nunknown initial state, undergoing Rabi oscillations. The ignorance of the\ndynamical paramete…