Browsing Research Publications/Outputs by Author "Uys, Hermann"

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Equation of motion for estimation fidelity of monitored oscillating qubits

Author: Bassa, H ; Konrad, T ; Diósi, L ; Uys, Hermann Date: Aug 2017 We study the convergence properties of state estimates of an oscillating qubit being monitored by a sequence of discrete, unsharp measurements. Our method derives a differential equation determining the evolution of the estimation fidelity ... Read more
Generating Greenberger-Horne-Zeilinger states with squeezing and postselection

Author: Alexander, B ; Bollinger, JJ ; Uys, Hermann Date: Jun 2020 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 tool ... Read more
Noninvasive measurement of dynamic correlation functions

Author: Uhrich, P ; Castrignano, S ; Uys, Hermann ; Kastner, M Date: Aug 2017 The measurement of dynamic correlation functions of quantum systems is complicated by measurement backaction. To facilitate such measurements we introduce a protocol, based on weak ancilla-system couplings, that is applicable to arbitrary ... Read more
Quantum control through measurement feedback

Author: Uys, Hermann ; Bassa, H ; Du Toit, P ; Ghosh, S ; Konrad, T Date: Jun 2018 Measurement combined with feedback that aims to restore a presumed premeasurement quantum state will yield this state after a few measurement-feedback cycles even if the actual state of the system initially had no resemblance to the presumed ... Read more
Real-time state estimation and feedback control of an oscillating qubit via self-fulfilling prophecy (SFP)

Author: Du Toit, PJW ; Burd, SC ; Konrad, T ; Uys, Hermann Date: Dec 2018 We present protocols for feedback control and stabilization of a single qubit undergoing Rabi oscillations. Using a hybrid quantum-classical Bayesian estimation technique we simulate monitoring of the dynamical parameter (Rabi frequency) of ... Read more

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Browsing Research Publications/Outputs by Author "Uys, Hermann"

Browsing Research Publications/Outputs by Author "Uys, Hermann"

Browse

All of ResearchSpace

This Community

Quick Links

Legislation and compliance

General Enquiries

Social Connect