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| Home > Publications database > Superconducting flux qubits compared to ideal two-level systems as building blocks for quantum annealers |
| Home > Publications database > Superconducting flux qubits compared to ideal two-level systems as building blocks for quantum annealers |
| Poster (Other) | FZJ-2018-01746 |
; ; ; ;
2018
Please use a persistent id in citations: http://hdl.handle.net/2128/17671
Abstract: For quantum computers, two theoretical models are nowadays considered to be the most important: the gate-based quantum computer and the quantum annealer.Gate-based quantum computers are based on computational gates just like classical computers, but have potentially more computational power due to the algebra behind quantum theory. A quantum annealer works fundamentally different: First the system is prepared in a known ground state of an initial Hamiltonian, then this Hamiltonian is adiabatically transformed into the final Hamiltonian whose ground state corresponds to the solution of a given problem, usually taken from the class of optimization problems.Quantum annealing works well in theory if the qubits can be modeled as two-level systems. However, in real devices, the qubits are not based on perfect two-level systems, but on a two-dimensional subspace of a larger system. This makes approximations in analytic calculations unavoidable.With a simulation utilizing the Suzuki-Trotter product-formula approach to solve the time-dependent Schrödinger equation, the time-evolution of the full state of such a device based onsuperconducting flux qubits is investigated.
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