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6 papers · 2 filters
Noise Dynamics of Quantum Annealers: Estimating the Effective Noise Using Idle Qubits
Elijah Pelofske, Georg Hahn, Hristo N. Djidjev
Quantum annealing is a type of analog computation that aims to use quantum mechanical fluctuations in search of optimal solutions of QUBO (quadratic unconstrained binary optimizati…
Extension of the Morris-Shore transformation to arbitrary time-dependent driving fields
K. N. Zlatanov, A. A. Rangelov, N. V. Vitanov
The treatment of time-dependent dynamics of quantum systems involving multiple states poses considerable technical challenges. One of the most efficient approaches in treating such…
Effects of spatial nonlocality versus nonlocal causality for bound electrons in external fields
Ivan P. Christov
Using numerically exact solution of the time-dependent Schroedinger equation together with time-dependent quantum Monte Carlo (TDQMC) calculations we compare the effects of spatial…
Solving Larger Maximum Clique Problems Using Parallel Quantum Annealing
Elijah Pelofske, Georg Hahn, Hristo N. Djidjev
Quantum annealing has the potential to find low energy solutions of NP-hard problems that can be expressed as quadratic unconstrained binary optimization problems. However, the har…
High-fidelity quantum control by polychromatic pulse trains
Svetoslav S. Ivanov, Boyan T. Torosov, Nikolay V. Vitanov
We introduce a quantum control technique using polychromatic pulse sequences (PPS), consisting of pulses with different carrier frequencies, i.e. different detunings with respect t…
Control of a qubit state by a soliton propagating through a Heisenberg spin chain
S. Varbev, I. Boradjiev, R. Kamburova +1
We demonstrate that nonlinear magnetic solitary excitations (solitons) traveling through a Heisenberg spin chain may be used as a robust tool capable of coherent control of the qub…