Complete Characterization of a Quantum Process: the Two-Bit Quantum Gate [PDF]
, 1996 We show how to fully characterize a quantum process in an open quantum system. We particularize the procedure to the case of a universal two-qubit gate in a quantum computer.
A. Peres +9 more
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The bitter truth about gate-based quantum algorithms in the NISQ era [PDF]
Quantum Science and Technology, 2020 Implementing a gate-based quantum algorithm on an noisy intermediate scale quantum (NISQ) device has several challenges that arise from the fact that such devices are noisy and have limited quantum resources.
F. Leymann, Johanna Barzen
semanticscholar +1 more source
Fast three-qubit Toffoli quantum gate based on three-body Förster resonances in Rydberg atoms [PDF]
Physical Review A, 2018 We propose a scheme of fast three-qubit Toffoli quantum gate for ultracold neutral-atom qubits. The scheme is based on the Stark-tuned three-body F\"{o}rster resonances, which we have observed in our recent experiment [D.B.Tretyakov et al., Phys.Rev.Lett.
I. Beterov +8 more
semanticscholar +1 more source
Gate-free state preparation for fast variational quantum eigensolver simulations
npj Quantum Information, 2021 The variational quantum eigensolver is currently the flagship algorithm for solving electronic structure problems on near-term quantum computers. The algorithm involves implementing a sequence of parameterized gates on quantum hardware to generate a ...
O. R. Meitei +6 more
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Gate-based superconducting quantum computing [PDF]
Journal of Applied Physics, 2020 In this tutorial, we introduce basic conceptual elements to understand and build a gate-based superconducting quantum computing system.
Sangil Kwon +4 more
semanticscholar +1 more source
Improving the Performance of Deep Quantum Optimization Algorithms with Continuous Gate Sets [PDF]
PRX Quantum, 2020 Variational quantum algorithms are believed to be promising for solving computationally hard problems and are often comprised of repeated layers of quantum gates. An example thereof is the quantum approximate optimization algorithm (QAOA), an approach to
N. Lacroix +12 more
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Pauli Error Propagation-Based Gate Rescheduling for Quantum Circuit Error Mitigation
IEEE Transactions on Quantum Engineering, 2022 Noisy intermediate-scale quantum algorithms, which run on noisy quantum computers, should be carefully designed to boost the output state fidelity. While several compilation approaches have been proposed to minimize circuit errors, they often omit the ...
Vedika Saravanan, Samah M. Saeed
doaj +1 more source
Measuring Controlled-NOT and two-qubit gate operation [PDF]
, 2003 Accurate characterisation of two-qubit gates will be critical for any realisation of quantum computation. We discuss a range of measurements aimed at characterising a two-qubit gate, specifically the CNOT gate.
Alexei Gilchrist +41 more
core +2 more sources
Scalable distributed gate-model quantum computers
Scientific Reports, 2021 A scalable model for a distributed quantum computation is a challenging problem due to the complexity of the problem space provided by the diversity of possible quantum systems, from small-scale quantum devices to large-scale quantum computers.
L. Gyongyosi, S. Imre
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Heralded Nondestructive Quantum Entangling Gate with Single-Photon Sources. [PDF]
Physical Review Letters, 2020 Heralded entangling quantum gates are an essential element for the implementation of large-scale optical quantum computation. Yet, the experimental demonstration of genuine heralded entangling gates with free-flying output photons in linear optical ...
Jin-Peng Li +12 more
semanticscholar +1 more source