78 citations · 132 across the 11 of their papers we have counts for
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Realization of a Quantum Error Detection Code with a Dynamically Reassigned Ancillary Qubit
Alena S. Kazmina, Artyom M. Polyanskiy, Elena Yu. Egorova +5
Quantum error correction (QEC) is essential for achieving fault-tolerant quantum computing. While superconducting qubits are among the most promising candidates for scalable QEC, t…
Variational preparation of entangled states in a system of transmon qubits
Alexander Yeremeyev, Aleksei Tolstobrov, Gleb Fedorov +11
The conventional method for generating entangled states in qubit systems relies on applying precise two-qubit entangling gates alongside single-qubit rotations. However, achieving…
High quality quasinormal modes of phononic crystals for quantum acoustodynamics
Aleksey N. Bolgar, Shtefan V. Sanduleanu, Aleksandr Strelnikov +1
Phononic crystals are a promising platform for the study of quantum acoustodynamics. In a recent experiment, the interaction of a superconducting quantum bit with modes of a phonon…
Highly stable aluminum air-bridges with stiffeners
Aleksey N. Bolgar, Daria A. Kalacheva, Viktor B. Lubsanov +4
Air-bridges play a critical role in the performance of microwave circuits integrated with superconducting quantum bits, and their mechanical stability is predominant for reliable o…
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…
A phononic crystal coupled to a transmission line via an artificial atom
Aleksey N. Bolgar, Daniil D. Kirichenko, Rais. S. Shaikhaidarov +4
We study a phononic crystal interacting with an artificial atom { a superconducting quantum system { in the quantum regime. The phononic crystal is made of a long lattice of narrow…
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…
Time dynamics of multi-photon scattering in a two-level mixer
A. V. Vasenin, A. Yu. Dmitriev, S. V. Kadyrmetov +2
A superconducting qubit in a waveguide behaves as a point-like nonlinear element. If irradiated with nearly resonant microwave pulses, the qubit undergoes quantum evolution and gen…
Quantum versus Classical Regime in Circuit Quantum Acoustodynamics
Gang-hui Zeng, Yang Zhang, Aleksey N. Bolgar +8
We experimentally study a circuit quantum acoustodynamics system, which consists of a superconducting artificial atom, coupled to both a two-dimensional surface acoustic wave reson…
Experimental demonstration of a two-dimensional phonon cavity in the quantum regime
A. N. Bolgar, J. I. Zotova, D. D. Kirichenko +4
The quantum regime in acoustic systems is a focus of recent fundamental research in the new field of Quantum Acoustodynamics (QAD). Systems based on surface acoustic waves having a…