13 citations · 95 across the 25 of their papers we have counts for
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Disentangling QAOA: From Weakly Entangled Circuits to a Classical QUBO Solver
Boris I. Bantysh, Andrey Yu. Chernyavskiy, Denis A. Kulikov +2
The role of entanglement in quantum optimization remains actively debated. To address this question, we focus on the fixed-parameter expanding-depth regime of the quantum approxima…
Evidence for effectively constant shot complexity in the quantum approximate optimization algorithm without per-instance optimization
Andrey Yu. Chernyavskiy, Denis A. Kulikov, Boris I. Bantysh +3
We study a modified fixed-point version of the Quantum Approximate Optimization Algorithm (fpQAOA), where parameters are trained classically on small instances and then transferred…
Progress in the development of quantum algorithms and software
Anastasiia S. Nikolaeva, Daria O. Konina, Anatolii V. Antipov +10
A quantum processor, like any computing device, requires the development of both hardware and the necessary set of software solutions, starting with quantum algorithms and ending w…
Fast reconstruction of programmable interferometers with intensity-only measurements
B. I. Bantysh, A. Yu. Chernyavskiy, S. A. Fldzhyan +1
Programmable linear optical interferometers are promising for classical and quantum applications. Their integrated design makes it possible to create more scalable and stable devic…
Entropic property of randomized QAOA circuits
A. Yu. Chernyavskiy, B. I. Bantysh, Yu. I. Bogdanov
Quantum approximate optimization algorithm (QAOA) aims to solve discrete optimization problems by sampling bitstrings using a parameterized quantum circuit. The circuit parameters…
High-precision tomography of ion qubits based on registration of fluorescent photons
Yu. I. Bogdanov, I. A. Dmitriev, B. I. Bantysh +2
We develop a new method for high-precision tomography of ion qubit registers under conditions of limited distinguishability of its logical states. It is not always possible to achi…
Quantum tomography for quantum systems optimization
B. I. Bantysh, Yu. I. Bogdanov
Debugging quantum states transformations is an important task of modern quantum computing. The use of quantum tomography for these purposes significantly expands the range of possi…
Measurement of polarization quantum states under chromatic aberration conditions
Yu. I. Bogdanov, B. I. Bantysh, N. A. Bogdanova +2
The wave plate is a basic device for transforming and measuring the polarization states of light. It is known that the transformation of light by means of two wave plates makes it…
Comparative analysis of various protocols for high-precision tomography of qudits
Yu. I. Bogdanov, B. I. Bantysh, N. A. Bogdanova +2
Quantum tomography is an important tool for obtaining information about the quantum state from experimental data. In this study, we conduct a comparative analysis of various quantu…
High-fidelity tomography of fluorescent ion qubits under conditions of limited discrimination between bright and dark levels
Yu. I. Bogdanov, B. I. Bantysh, N. A. Bogdanova +2
The present work is devoted to the development of a method for high-precision tomography of ion qubit registers under conditions of limited distinguishability of the states of a lo…
Statistical parameter estimation of multimode multiphoton subtracted thermal states of light
G. V. Avosopiants, B. I. Bantysh, K. G. Katamadze +3
Thermal states of light are widely used in quantum optics for various quantum phenomena testing. Particularly, they can be utilized for characterization of photon creation and phot…
Quantum tomography benchmarking
B. I. Bantysh, A. Yu. Chernyavskiy, Yu. I. Bogdanov
Recent advances in quantum computers and simulators are steadily leading us towards full-scale quantum computing devices. Due to the fact that debugging is necessary to create any…
Quantum tomography of noisy ion-based qudits
B. I. Bantysh, Yu. I. Bogdanov
Quantum tomography makes it possible to obtain comprehensive information about certain logical elements of a quantum computer. In this regard, it is a promising tool for debugging…
Precise tomography of optical polarization qubits under conditions of chromatic aberration of quantum transformations
B. I. Bantysh, Yu. I. Bogdanov, N. A. Bogdanova +1
In this work we present an algorithm of building an adequate model of polarizing quantum state measurement. This model takes into account chromatic aberration of the basis change t…
Machine learning methods in quantum computing theory
D. V. Fastovets, Yu. I. Bogdanov, B. I. Bantysh +1
Classical machine learning theory and theory of quantum computations are among of the most rapidly developing scientific areas in our days. In recent years, researchers investigate…
Quantum tomography based on principles of completeness, adequacy and fidelity
Yu. I. Bogdanov, N. A. Bogdanova, B. I. Bantysh +2
In this report we present a general approach for estimating quantum circuits by means of measurements. We apply the developed general approach for estimating the quality of superco…
The concept of weak measurements and the super-efficiency of quantum tomography
Yu. I. Bogdanova, N. A. Bogdanova, B. I. Bantysh +1
The quantum measurement procedure based on the Lorentz transformation formalism and weak perturbation of the system is considered. In the simple case of a single-qubit it turns out…
High-fidelity quantum tomography with imperfect measurements
B. I. Bantysh, D. V. Fastovets, Yu. I. Bogdanov
In the current work we address the problem of quantum process tomography (QPT) in the case of imperfect preparation and measurement of the states which are used for QPT. The fuzzy…
The influence of quantum noise on the Grover algorithm and quantum Fourier transform: quantum operations theory approach
Yu. I. Bogdanov, A. Yu. Chernyavskiy, B. I. Bantysh +2
The method of noisy multiqubit quantum circuits modeling is proposed. The analytical formulas for the dependence of quantum algorithms accuracy on qubits count and noise level are…
Non-Gaussianity of multiple photon subtracted thermal states in terms of compound-Poisson photon number distribution parameters: theory and experiment
G. V. Avosopiants, K. G. Katamadze, Yu. I. Bogdanov +1
The multiphoton-subtracted thermal states are an interesting example of quantum states of light which are both classical and non-Gaussian. All the properties of such states can be…
Tomography of multi-photon polarization states in conditions of non-unit quantum efficiency of detectors
Yu. I. Bogdanov, B. I. Bantysh, N. A. Bogdanova +1
The polarizing multi-photon quantum states tomography with non-unit quantum efficiency of detectors is considered. A new quantum tomography protocol is proposed. This protocol cons…
Quantum states tomography with noisy measurement channels
Yu. I. Bogdanov, B. I. Bantysh, N. A. Bogdanova +2
We consider realistic measurement systems, where measurements are accompanied by decoherence processes. The aim of this work is the construction of methods and algorithms for preci…
Numerical and analytical research of the impact of decoherence on quantum circuits
Yu. I. Bogdanov, A. Yu. Chernyavskiy, B. I. Bantysh +5
Three different levels of noisy quantum schemes modeling are considered: vectors, density matrices and Choi-Jamiolkowski related states. The implementations for personal computers…
The study of amplitude and phase relaxation impact on the quality of quantum information technologies
Yu. I. Bogdanov, B. I. Bantysh, A. Yu. Chernyavskiy +2
The influence of amplitude and phase relaxation on evolution of quantum states within the formalism of quantum operations is considered. The model of polarizing qubits where noises…