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
22 papers · 2 filters
State preparation of a fluxonium qubit with feedback from a custom FPGA-based platform
Richard Gebauer, Nick Karcher, Daria Gusenkova +12
We developed a versatile integrated control and readout instrument for experiments with superconducting quantum bits (qubits), based on a field-programmable gate array (FPGA) platf…
Experimental Simulation of Hybrid Quantum Systems and Entanglement on a Quantum Computer
Farai Mazhandu, Kayleigh Mathieson, Christopher Coleman +1
We propose the utilization of the IBM Quantum Experience quantum computing system to simulate different scenarios involving common hybrid quantum system components, the Nitrogen Va…
Optical control of single-photon negative-feedback avalanche diode detector
Gaëtan Gras, Nigar Sultana, Anqi Huang +4
We experimentally demonstrate optical control of negative-feedback avalanche diode (NFAD) detectors using bright light. We deterministically generate fake single-photon detections…
Resolving the positions of defects in superconducting quantum bits
Alexander Bilmes, Anthony Megrant, Paul Klimov +4
Solid-state quantum coherent devices are quickly progressing. Superconducting circuits, for instance, have already been used to demonstrate prototype quantum processors comprising…
Implementation of a transmon qubit using superconducting granular aluminum
Patrick Winkel, Kiril Borisov, Lukas Grünhaupt +6
The high kinetic inductance offered by granular aluminum (grAl) has recently been employed for linear inductors in superconducting high-impedance qubits and kinetic inductance dete…
Active beam splitting attack applied to differential phase shift quantum key distribution protocol
A. S. Avanesov, D. A. Kronberg, A. N. Pechen
The differential phase shift quantum key distribution protocol is of high interest due to its relatively simple practical implementation. This protocol uses trains of coherent puls…
Attacking quantum key distribution by light injection via ventilation openings
Juan Carlos Garcia-Escartin, Shihan Sajeed, Vadim Makarov
Quantum cryptography promises security based on the laws of physics with proofs of security against attackers of unlimited computational power. However, deviations from the origina…
Minimal Time Generation of Density Matrices for a Two-Level Quantum System Driven by Coherent and Incoherent Controls
Oleg V. Morzhin, Alexander N. Pechen
The article considers a two-level open quantum system whose dynamics is driven by a combination of coherent and incoherent controls. Coherent control enters into the Hamiltonian pa…
Control landscape for ultrafast manipulation by a qubit
Alexander Pechen, Nikolay Il'in
In this work we study extrema of objective functionals for ultrafast manipulation by a qubit. Traps are extrema of the objective functionals which are optimal for manipulation by q…
Non-degenerate parametric amplifiers based on dispersion engineered Josephson junction arrays
Patrick Winkel, Ivan Takmakov, Dennis Rieger +12
Determining the state of a qubit on a timescale much shorter than its relaxation time is an essential requirement for quantum information processing. With the aid of a new type of…
Quantum master equations for a system interacting with quantum gas in the low density limit and for the semiclassical collision model
S. N. Filippov, G. N. Semin, A. N. Pechen
A quantum system interacting with a dilute gas experiences irreversible dynamics. The corresponding master equation can be derived within two different approaches: The fully quantu…
Amplitude and frequency sensing of microwave fields with a superconducting transmon qudit
Maximilian Kristen, Andre Schneider, Alexander Stehli +9
Experiments with superconducting circuits require careful calibration of the applied pulses and fields over a large frequency range. This remains an ongoing challenge as commercial…
Uncomputability and complexity of quantum control
Denys I. Bondar, Alexander N. Pechen
In laboratory and numerical experiments, physical quantities are known with a finite precision and described by rational numbers. Based on this, we deduce that quantum control prob…
Automated analysis of single-tone spectroscopic data for cQED systems
G. P. Fedorov, A. V. Ustinov
Physical systems for quantum computation require calibration of the control parameters based on their physical characteristics by performing a chain of experiments that gather most…
Laser damage attack against optical attenuators in quantum key distribution
Anqi Huang, Ruoping Li, Vladimir Egorov +3
Many quantum key distribution systems employ a laser followed by an optical attenuator to prepare weak coherent states in the source. Their mean photon number must be pre-calibrate…
Transmon Qubit in a Magnetic Field: Evolution of Coherence and Transition Frequency
Andre Schneider, Tim Wolz, Marco Pfirrmann +4
We report on spectroscopic and time-domain measurements on a fixed-frequency concentric transmon qubit in an applied in-plane magnetic field to explore its limits of magnetic field…
Magnons at low excitations: Observation of incoherent coupling to a bath of two-level-systems
Marco Pfirrmann, Isabella Boventer, Andre Schneider +4
Collective magnetic excitation modes, magnons, can be coherently coupled to microwave photons in the single excitation limit. This allows for access to quantum properties of magnon…
Electromagnetic waves propagation through an array of superconducting qubits: manifestations of non-equilibrium steady states of qubits
Mikhail V. Fistul, Mikhail A. Iontsev
We report a theoretical study of the electromagnetic waves (EWs) propagation through an array of superconducting qubits, i.e. coherent two-level systems, embedded in a low-dissipat…
Laser seeding attack in quantum key distribution
Anqi Huang, Álvaro Navarrete, Shi-Hai Sun +3
Quantum key distribution (QKD) based on the laws of quantum physics allows the secure distribution of secret keys over an insecure channel. Unfortunately, imperfect implementations…
Revealing quantum chaos with machine learning
Y. A. Kharkov, V. E. Sotskov, A. A. Karazeev +2
Understanding properties of quantum matter is an outstanding challenge in science. In this paper, we demonstrate how machine-learning methods can be successfully applied for the cl…
Bright-light detector control emulates the local bounds of Bell-type inequalities
Shihan Sajeed, Nigar Sultana, Charles Ci Wen Lim +1
It is well-known that no local model - in theory - can simulate the outcome statistics of a Bell-type experiment as long as the detection efficiency is higher than a threshold valu…
Eavesdropper's ability to attack a free-space quantum-key-distribution receiver in atmospheric turbulence
Poompong Chaiwongkhot, Katanya B. Kuntz, Yanbao Zhang +6
The ability of an eavesdropper (Eve) to perform an intercept-resend attack on a free-space quantum key distribution (QKD) receiver by precisely controlling the incidence angle of a…