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
23 papers · 2 filters
Amplification of quantum transfer and quantum ratchet
Sergei Kozyrev, Alexander Pechen
Amplification of quantum transfer and ratchet--type processes are important for quantum technologies. We also expect that quantum ratchet works in quantum photosynthesis, where pos…
Control and readout of a transmon using a compact superconducting resonator
Julia Zotova, Shtefan Sanduleanu, Gleb Fedorov +3
We demonstrate control and readout of a superconducting artificial atom based on a transmon qubit using a compact lumped-element resonator. The resonator consists of a parallel-pla…
Security of the decoy-state BB84 protocol with imperfect state preparation
Aleksei Reutov, Andrey Tayduganov, Vladimir Mayboroda +1
The quantum key distribution (QKD) allows two remote users to share a common information-theoretic secure secret key. In order to guarantee the security of a practical QKD implemen…
Quantum control landscape for generation of and gates in an open qubit with both coherent and environmental drive
Vadim Petruhanov, Alexander Pechen
An important problem in quantum computation is generation of single-qubit quantum gates such as Hadamard () and () gates which are components of a universal set of gate…
Qudits for decomposing multiqubit gates and realizing quantum algorithms
Evgeniy O. Kiktenko, Anastasiia S. Nikolaeva, Aleksey K. Fedorov
The paradigm behind digital quantum computing inherits the idea of using binary information processing. Nature in fact gives much more rich structures of physical objects that can…
Eurasian-Scale Experimental Satellite-based Quantum Key Distribution with Detector Efficiency Mismatch Analysis
Aleksandr V. Khmelev, Alexey V. Duplinsky, Ruslan M. Bakhshaliev +9
The Micius satellite is the pioneering initiative to demonstrate quantum teleportation, entanglement distribution, quantum key distribution (QKD), and quantum-secured communication…
Demonstration of a parity-time symmetry breaking phase transition using superconducting and trapped-ion qutrits
Alena S. Kazmina, Ilia V. Zalivako, Alexander S. Borisenko +21
Scalable quantum computers hold the promise to solve hard computational problems, such as prime factorization, combinatorial optimization, simulation of many-body physics, and quan…
Preparing a commercial quantum key distribution system for certification against implementation loopholes
Vadim Makarov, Alexey Abrikosov, Poompong Chaiwongkhot +9
A commercial quantum key distribution (QKD) system needs to be formally certified to enable its wide deployment. The certification should include the system's robustness against kn…
Evolution of coherent waves driving a single artificial atom
A. V. Vasenin, Sh. V. Kadyrmetov, A. N. Bolgar +2
An electromagnetic wave propagating through a waveguide with a strongly coupled superconducting artificial two-level atom exhibits an evolving superposition with the atom. The Rabi…
Optimization of Time-Dependent Decoherence Rates and Coherent Control for a Qutrit System
Oleg Morzhin, Alexander Pechen
The work considers an open qutrit system whose density matrix evolution is governed by the Gorini-Kossakowski-Sudarshan-Lindblad master equation with simultaneous coherent (…
Reliable confidence regions for quantum tomography using distribution moments
D. O. Norkin, E. O. Kiktenko, A. K. Fedorov
Quantum tomography is a widely applicable method for reconstructing unknown quantum states and processes. However, its applications in quantum technologies usually also require est…
Digitization of a random signal from the interference of laser pulses
Roman Shakhovoy
In the study of quantum random number generators (QRNGs), the problem of random signal digitization is often not considered in detail. However, in the context of a standalone QRNG…
Minimizing the negativity of quantum circuits in overcomplete quasiprobability representations
Denis A. Kulikov, Vsevolod I. Yashin, Aleksey K. Fedorov +1
The problem of simulatability of quantum processes using classical resources plays a cornerstone role for quantum computing. Quantum circuits can be simulated classically, e.g., us…
Hybrid quantum learning with data re-uploading on a small-scale superconducting quantum simulator
Aleksei Tolstobrov, Gleb Fedorov, Shtefan Sanduleanu +11
Supervised quantum learning is an emergent multidisciplinary domain bridging between variational quantum algorithms and classical machine learning. Here, we study experimentally a…
Fourier expansion in variational quantum algorithms
Nikita A. Nemkov, Evgeniy O. Kiktenko, Aleksey K. Fedorov
The Fourier expansion of the loss function in variational quantum algorithms (VQA) contains a wealth of information, yet is generally hard to access. We focus on the class of varia…
Deploying hybrid quantum-secured infrastructure for applications: When quantum and post-quantum can work together
Aleksey K. Fedorov
Most currently used cryptographic tools for protecting data are based on certain computational assumptions, which makes them vulnerable with respect to technological and algorithmi…
Optimal State Manipulation for a Two-Qubit System Driven by Coherent and Incoherent Controls
Oleg Morzhin, Alexander Pechen
Optimal control of two-qubit quantum systems attracts high interest due to applications ranging from two-qubit gate generation to optimization of receiver for transferring coherenc…
Security boundaries of an optical power limiter for protecting quantum key distribution systems
Qingquan Peng, Binwu Gao, Konstantin Zaitsev +7
Unauthorized light injection has always been a vital threat to the practical security of a quantum key distribution (QKD) system. An optical power limiter (OPL) based on the thermo…
Pitfalls of the sublinear QAOA-based factorization algorithm
Sergey V. Grebnev, Maxim A. Gavreev, Evgeniy O. Kiktenko +3
Quantum computing devices are believed to be powerful in solving the prime factorization problem, which is at the heart of widely deployed public-key cryptographic tools. However,…
Quantum Gate Generation in Two-Level Open Quantum Systems by Coherent and Incoherent Photons Found with Gradient Search
Vadim Petruhanov, Alexander Pechen
In this work, we consider an environment formed by incoherent photons as a resource for controlling open quantum systems via an incoherent control. We exploit a coherent control in…
Coupler microwave-activated controlled phase gate on fluxonium qubits
Ilya A. Simakov, Grigoriy S. Mazhorin, Ilya N. Moskalenko +8
Tunable couplers have recently become one of the most powerful tools for implementing two-qubit gates between superconducting qubits. A tunable coupler typically includes a nonline…
Universal quantum computing with qubits embedded in trapped-ion qudits
Anastasiia S. Nikolaeva, Evgeniy O. Kiktenko, Aleksey K. Fedorov
Recent developments in qudit-based quantum computing, in particular with trapped ions, open interesting possibilities for scaling quantum processors without increasing the number o…
Gain-switched vcsel as a quantum entropy source: the problem of quantum and classical noise
Roman Shakhovoy, Elizaveta Maksimova
We consider the problem of quantum noise extraction from polarization swapping in a gain-switched VCSEL. The principle of operation of a quantum random number generator is based on…