44 citations · 105 across the 11 of their papers we have counts for
11 papers
Strengthening the quantum data processing inequality for maximal -divergences via unraveling
Marcos Ruibal Ortigueira, Robert de Keijzer, Luke Visser +2
Maximal -divergences, among them the Belavkin--Staszewski relative entropy, are non-increasing under completely positive trace-preserving maps, which is the quantum data process…
Fidelity Relations in an Array of Neutral Atom Qubits -- Experimental Validation of Control Noise
Deon Janse van Rensburg, Robert de Keijzer, Rogier Venderbosch +5
Noise is a hindering factor for current-era quantum computers. In this study, we experimentally validate the theoretical relationships between amplitude noise of the control signal…
Consensus-based qubit configuration optimization for variational algorithms on neutral atom quantum systems
Robert de Keijzer, Luke Visser, Oliver Tse +1
In this work, we report an algorithm that is able to tailor qubit interactions for individual variational quantum algorithm problems. Here, the algorithm leverages the unique abili…
Fidelity-Enhanced Variational Quantum Optimal Control
Robert de Keijzer, Luke Visser, Oliver Tse +1
Creating robust quantum operations is a major challenge in the current noisy intermediate-scale quantum computing era. Recently, the importance of noise-resilient control methods h…
Pulse family optimization for parametrized quantum gates using spectral clustering
Robert de Keijzer, Jurgen Snijders, André Carvalho +1
Parametrized gate circuits are used in plentiful applications in the current NISQ era of quantum computing. These parametrized gates are chiefly implemented using analytically foun…
Qubit fidelity under stochastic Schrödinger equations driven by colored noise
Robert de Keijzer, Luke Visser, Oliver Tse +1
Environmental noise on a controlled quantum system is generally modeled by a dissipative Lindblad equation. This equation describes the average state of the system via the density…
Variational method for learning Quantum Channels via Stinespring Dilation on neutral atom systems
L. Y. Visser, R. J. P. T. de Keijzer, O. Tse +1
Real-world quantum systems interact with their environments, leading to the irreversible dynamics described by the Lindblad equation. Solutions to the Lindblad equation give rise t…
Recapture Probability for anti-trapped Rydberg states in optical tweezers
R. J. P. T. de Keijzer, O. Tse, S. J. J. M. F. Kokkelmans
In a neutral atom quantum computer, the qubits are individual neutral atoms trapped in optical tweezers. Excitations to Rydberg states form the basis for the entanglement procedure…
Robust control and optimal Rydberg states for neutral atom two-qubit gates
Madhav Mohan, Robert de Keijzer, Servaas Kokkelmans
We investigate the robustness of two-qubit gates to deviations of experimental controls, on a neutral atom platform utilizing Rydberg states. We construct robust CZ gates - employi…
Pulse based Variational Quantum Optimal Control for hybrid quantum computing
Robert de Keijzer, Oliver Tse, Servaas Kokkelmans
This work studies pulse based variational quantum algorithms (VQAs), which are designed to determine the ground state of a quantum mechanical system by combining classical and quan…
Optimization of the Variational Quantum Eigensolver for Quantum Chemistry Applications
R. J. P. T. de Keijzer, V. E. Colussi, B. Škorić +1
This work studies the variational quantum eigensolver algorithm, designed to determine the ground state of a quantum mechanical system by combining classical and quantum hardware.…