314 citations · 493 across the 6 of their papers we have counts for
6 papers
Eigenvalue-invariant transformation of Ising problem for anti-crossing mitigation in quantum annealing
Toru Fujii, Koshi Komuro, Yosuke Okudaira +1
We have proposed the energy landscape transformation of Ising problems (ELTIP), which changes the combination of the state and eigenvalue without changing all the original eigenval…
Energy landscape transformation of Ising problem with invariant eigenvalues for quantum annealing
Toru Fujii, Koshi Komuro, Yosuke Okudaira +2
Quantum annealing tends to be more difficult as the energy landscape of the problem becomes complicated with many local minima. We have found a transformation for changing the ener…
Time-optimal CNOT between indirectly coupled qubits in a linear Ising chain
A. Carlini, A. Hosoya, T. Koike +1
We give analytical solutions for the time-optimal synthesis of entangling gates between indirectly coupled qubits 1 and 3 in a linear spin chain of three qubits subject to an Ising…
Time complexity and gate complexity
Tatsuhiko Koike, Yosuke Okudaira
We formulate and investigate the simplest version of time-optimal quantum computation theory (t-QCT), where the computation time is defined by the physical one and the Hamiltonian…
Time Optimal Unitary Operations
Alberto Carlini, Akio Hosoya, Tatsuhiko Koike +1
Extending our previous work on time optimal quantum state evolution, we formulate a variational principle for the time optimal unitary operation, which has direct relevance to quan…
Quantum Brachistochrone
Alberto Carlini, Akio Hosoya, Tatsuhiko Koike +1
We present a general framework for finding the time-optimal evolution and the optimal Hamiltonian for a quantum system with a given set of initial and final states. Our formulation…