507 citations · 571 across the 20 of their papers we have counts for
20 papers
A Robust Strontium Tweezer Apparatus for Quantum Computing
Marijn Venderbosch, Rik van Herk, Zhichao Guo +11
Neutral atoms for quantum computing applications show promise in terms of scalability and connectivity. We demonstrate the realization of a versatile apparatus capable of stochasti…
Lie algebra-assisted quantum simulation and quantum optimal control via high-order Magnus expansions
R. F. dos Santos, S. J. J. M. F. Kokkelmans
The evolution of a quantum system under time-dependent driving exhibits phenomena that are absent in its stationary counterpart. However, the high dimensionality and non-commutativ…
-Enhanced Gray Molasses Cooling of Rb Atoms in Tweezers Using the D Line
Deon Janse van Rensburg, Rogier Venderbosch, Yuri van der Werf +5
We demonstrate the implementation of -enhanced gray molasses cooling on the D line of Rb atoms in an optical tweezer array. This technique yields lower atomic tempera…
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…
Acousto-optic lens for 3D shuttling of atoms in a neutral atom quantum computer
Zhichao Guo, Rik A. H. van Herk, Edgar J. D. Vredenbregt +1
We present a novel acousto-optic lens (AOL) design for neutral atom quantum computing. This approach enhances atom rearrangement in optical tweezer arrays and addresses the speed l…
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…
Existence and Characterisation of Bivariate Bicycle Codes
Jasper Johannes Postema, Servaas J. J. M. F. Kokkelmans
Encoding quantum information in a quantum error correction (QEC) code offers protection against decoherence and enhances the fidelity of qubits and gate operations. One of the fund…
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…
Parametrized multiqubit gate design for neutral-atom based quantum platforms
Madhav Mohan, Julius de Hond, Servaas Kokkelmans
A clever choice and design of gate sets can reduce the depth of a quantum circuit, and can improve the quality of the solution one obtains from a quantum algorithm. This is especia…
Geometrical Approach to Logical Qubit Fidelities of Neutral Atom CSS Codes
J. J. Postema, S. J. J. M. F. Kokkelmans
Encoding quantum information in a quantum error correction (QEC) code enhances protection against errors. Imperfection of quantum devices due to decoherence effects will limit the…
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…
Higgs oscillations in a unitary Fermi superfluid
P. Dyke, S. Musolino, H. Kurkjian +7
Symmetry-breaking phase transitions are central to our understanding of states of matter. When a continuous symmetry is spontaneously broken, new excitations appear that are tied t…
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…
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.…
Patterned Rydberg excitation and ionisation with a spatial light modulator
R. M. W. van Bijnen, C. Ravensbergen, D. J. Bakker +3
We demonstrate the ability to excite atoms at well-defined, programmable locations in a magneto-optical trap, either to the continuum (ionisation), or to a Rydberg state. To this e…
Hartree-Fock-Bogoliubov Model and Simulation of Attractive and Repulsive Bose-Einstein Condensates
V. D. Snyder, S. J. J. M. F. Kokkelmans, L. D. Carr
We describe a model of dynamic Bose-Einstein condensates near a Feshbach resonance that is computationally feasible under assumptions of spherical or cylindrical symmetry. Simulati…
Resonance superfluidity in a quantum degenerate Fermi gas
M. Holland, S. J. J. M. F. Kokkelmans, M. L. Chiofalo +1
We consider the superfluid phase transition that arises when a Feshbach resonance pairing occurs in a dilute Fermi gas. We apply our theory to consider a specific resonance in pota…