1.3k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Université Paris-SaclayFR309 papers
- University of GlasgowGB306 papers
- European Organization for Nuclear ResearchCH302 papers
- University of WarwickGB302 papers
- Centre National de la Recherche ScientifiqueFR300 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT300 papers
- Heidelberg UniversityDE299 papers
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiIT299 papers
- University of CambridgeGB299 papers
- University of ManchesterGB299 papers
- Rutherford Appleton LaboratoryGB298 papers
- University of OxfordGB296 papers
26 papers · 2 filters
Decomposing the generalized Toffoli gate with qutrits
A. S. Nikolaeva, E. O. Kiktenko, A. K. Fedorov
The problem of finding efficient decompositions of multi-qubit gates is of importance for quantum computing, especially, in application to existing noisy intermediate-scale quantum…
Quantum dynamics of disordered arrays of interacting superconducting qubits: signatures of quantum collective states
M. V. Fistul, O. Neyenhuys, A. B. Bocaz +1
We study theoretically the collective quantum dynamics occurring in various interacting superconducting qubits arrays (SQAs) in the presence of a spread of individual qubit frequen…
QND measurements of photon number in monolithic microcavities
S. N. Balybin, A. B. Matsko, F. Ya. Khalili +5
We revisit the idea of quantum nondemolition measurement (QND) of optical quanta via a resonantly enhanced Kerr nonlinearity taking into account quantum back action and show that t…
Critical phase boundary and finite-size fluctuations in Su-Schrieffer-Heeger model with random inter-cell couplings
D. S. Shapiro, S. V. Remizov, A. V. Lebedev +4
A dimerized fermion chain, described by Su-Schrieffer-Heeger (SSH) model, is a well-known example of 1D system with a non-trivial band topology. An interplay of disorder and topolo…
Efficient realization of quantum algorithms with qudits
Anastasiia S. Nikolaeva, Evgeniy O. Kiktenko, Aleksey K. Fedorov
The development of a universal fault-tolerant quantum computer that can solve efficiently various difficult computational problems is an outstanding challenge for science and techn…
Trajectories without quantum uncertainties in composite systems with disparate energy spectra
Emil Zeuthen, Eugene S. Polzik, Farid Ya. Khalili
It is well established that measurement-induced quantum back action (QBA) can be eliminated in composite systems by engineering so-called quantum-mechanics-free subspaces (QMFSs) o…
Open quantum system dynamics and the mean force Gibbs state
A. S. Trushechkin, M. Merkli, J. D. Cresser +1
The dynamical convergence of a system to the thermal distribution, or Gibbs state, is a standard assumption across all of the physical sciences. The Gibbs state is determined just…
Reachable sets for two-level open quantum systems driven by coherent and incoherent controls
Lev Lokutsievskiy, Alexander Pechen
In this work, we study controllability in the set of all density matrices for a two-level open quantum system driven by coherent and incoherent controls. In [A. Pechen, Phys. Rev.…
Probing defect densities at the edges and inside Josephson junctions of superconducting qubits
Alexander Bilmes, Serhii Volosheniuk, Alexey V. Ustinov +1
Tunneling defects in disordered materials form spurious two-level systems which are a major source of decoherence for micro-fabricated quantum devices. For superconducting qubits,…
Effects of photon statistics in wave mixing on a single qubit
W. V. Pogosov, A. Yu. Dmitriev, O. V. Astafiev
We theoretically consider wave mixing under the irradiation of a single qubit by two photon fields. The first signal is a classical monochromatic drive, while the second one is a n…
Quantum feedback control in quantum photosynthesis
S. V. Kozyrev, A. N. Pechen
A model of charge separation in quantum photosynthesis as a model of quantum feedback control in a system of interacting excitons and vibrons is introduced. Quantum feedback in thi…
Tunable coupling scheme for implementing two-qubit gates on fluxonium qubits
I. N. Moskalenko, I. S. Besedin, I. A. Simakov +1
The superconducting fluxonium circuit is an RF-SQUID-type flux qubit that uses a large inductance built from an array of Josephson junctions or a high kinetic inductance material.…
Simulation of the five-qubit quantum error correction code on superconducting qubits
I. A. Simakov, I. S. Besedin, A. V. Ustinov
Experimental realization of stabilizer-based quantum error correction (QEC) codes that would yield superior logical qubit performance is one of the formidable task for state-of-the…
Cavity-QED of a quantum metamaterial with tunable disorder
Grigoriy S. Mazhorin, Ilya N. Moskalenko, Ilya S. Besedin +8
We explore experimentally a quantum metamaterial based on a superconducting chip with 25 frequency-tunable transmon qubits coupled to a common coplanar resonator. The collective br…
Numerical estimation of reachable and controllability sets for a two-level open quantum system driven by coherent and incoherent controls
Oleg V. Morzhin, Alexander N. Pechen
The article considers a two-level open quantum system, whose evolution is governed by the Gorini--Kossakowski--Lindblad--Sudarshan master equation with Hamiltonian and dissipation…
Tunable Anderson Localization of Dark States
Jan David Brehm, Paul Pöpperl, Alexander D. Mirlin +4
Random scattering of photons in disordered one-dimensional solids gives rise to an exponential suppression of transmission, which is known as Anderson localization. Here, we experi…
Quantum control landscape for ultrafast generation of single-qubit phase shift quantum gates
Boris O. Volkov, Oleg V. Morzhin, Alexander N. Pechen
In this work, we consider the problem of ultrafast controlled generation of single-qubit phase shift quantum gates. Globally optimal control is a control which realizes the gate wi…
Non-commutative graphs based on finite-infinite system couplings: quantum error correction for a qubit coupled to a coherent field
G. G. Amosov, A. S. Mokeev, A. N. Pechen
Quantum error correction plays a key role for quantum information transmission and quantum computing. In this work, we develop and apply the theory of non-commutative operator grap…
Quantum beats of a magnetic fluxon in a two-cell SQUID
I. N. Moskalenko, I. S. Besedin, S. S. Seidov +2
We report a detailed theoretical study of a coherent macroscopic quantum-mechanical phenomenon - quantum beats of a single magnetic fluxon trapped in a two-cell SQUID of high kinet…
Complete structural restoring of transferred multi-qubit quantum state
E. B. Fel'dman, A. N. Pechen, A. I. Zenchuk
We develop the protocol for structural restoring of multi-quantum coherence matrices of the multi-qubit quantum state transferred from the sender to the receiver along a spin-1/2 c…
Optimizing the deployment of quantum key distribution switch-based networks
Andrey Tayduganov, Vadim Rodimin, Evgeniy O. Kiktenko +7
Quantum key distribution (QKD) networks provide an infrastructure for establishing information-theoretic secure keys between legitimate parties via quantum and authentic classical…
Dead time duration and active reset influence on the afterpulse probability of InGaAs/InP single-photon avalanche diodes
A. V. Losev, V. V. Zavodilenko, A. A. Koziy +4
We have performed a detailed study of the dependence of afterpulse probability in InGaAs/InP sine-gated SPAD on the dead time and the existing approach for its implementation. We d…
Probing non-Markovian quantum dynamics with data-driven analysis: Beyond "black-box" machine learning models
I. A. Luchnikov, E. O. Kiktenko, M. A. Gavreev +3
A precise understanding of the influence of a quantum system's environment on its dynamics, which is at the heart of the theory of open quantum systems, is crucial for further prog…
Unified Gorini-Kossakowski-Lindblad-Sudarshan quantum master equation beyond the secular approximation
Anton Trushechkin
Derivation of a quantum master equation for a system weakly coupled to a bath which takes into account nonsecular effects, but nevertheless has the mathematically correct Gorini-Ko…