874 citations · 3.8k across the 136 of their papers we have counts for
12 papers · 2 filters
Ultrahigh-fidelity composite rotational quantum gates
Hayk Gevorgyan, Nikolay V. Vitanov
Composite pulse sequences, which produce arbitrary pre-defined rotations of a qubit on the Bloch sphere, are presented. The composite sequences contain up to 17 pulses and can comp…
Coherent control techniques for two-state quantum systems: A comparative study
Boyan T. Torosov, Bruce W. Shore, Nikolay V. Vitanov
We evaluate various sources of errors that occur when attempting to produce a specified coherent change of a two-state quantum system using six popular coherent control techniques:…
Two-qubit entanglement generation through non-Hermitian Hamiltonians induced by repeated measurements on an ancilla
R. Grimaudo, A. Messina, A. Sergi +2
In contrast to classical systems, actual implementation of non-Hermitian Hamiltonian dynamics for quantum systems is a challenge because the processes of energy gain and dissipatio…
Morris-Shore transformation for non-degenerate systems
K. N. Zlatanov, G. S. Vasilev, N. V. Vitanov
The Morris-Shore (MS) transformation is a powerful tool for decomposition of the dynamics of multistate quantum systems to a set of two-state systems and uncoupled single states. I…
Chiral resolution by composite Raman pulses
Boyan T. Torosov, Michael Drewsen, Nikolay V. Vitanov
We present two methods for efficient detection of chiral molecules based on sequences of single pulses and Raman pulse pairs. The chiral molecules are modelled by a closed-loop thr…
Dzyaloshinskii-Moriya and dipole-dipole interactions affect coupling-based Landau-Majorana-Stückelberg-Zener transitions
Roberto Grimaudo, Hiromichi Nakazato, Antonino Messina +1
It has been theoretically demonstrated that two spins (qubits or qutrits), coupled by exchange interaction only, undergo a coupling-based joint Landau-Majorana-Stückelberg-Zener (L…
High-fidelity composite quantum gates for Raman qubits
Boyan T. Torosov, Nikolay V. Vitanov
We present a general systematic approach to design robust and high-fidelity quantum logic gates with Raman qubits using the technique of composite pulses. We use two mathematical t…
Narrowband and passband composite pulses for variable rotations
Boyan T. Torosov, Svetoslav S. Ivanov, Nikolay V. Vitanov
We develop a systematic approach to derive narrowband (NB) and passband (PB) composite sequences which can produce any pre-selected transition probability with any desired accuracy…
High-fidelity multistate STIRAP assisted by shortcut fields
Nikolay V. Vitanov
Multistate stimulated Raman adiabatic passage (STIRAP) is a process which allows for adiabatic population transfer between the two ends of a chainwise-connected quantum system. The…
Universal Composite Pulses for Efficient Population Inversion with an Arbitrary Excitation Profile
Genko T. Genov, Marcel Hain, Nikolay V. Vitanov +1
We introduce a method to rotate arbitrarily the excitation profile of universal broadband composite pulse sequences for robust high-fidelity population inversion. These pulses comp…
Efficient and robust chiral resolution by composite pulses
Boyan T. Torosov, Michael Drewsen, Nikolay V. Vitanov
We introduce a method for detection of chiral molecules using sequences of three pulses driving a closed-loop three-state quantum system. The left- and right-handed enantiomers hav…
Two-qubit quantum Fourier transform and entanglement protected by circulant symmetry
Peter A. Ivanov, Nikolay V. Vitanov
We propose a method for the realization of the two-qubit quantum Fourier transform (QFT) using a Hamiltonian which possesses the circulant symmetry. Importantly, the eigenvectors o…