54 citations · 322 across the 26 of their papers we have counts for
26 papers
Anomalous Frequency Shift in Low-Loss Superconducting Granular Aluminum Resonators
Patrick Winkel, Daniil S. Antonenko, Vishakha Gupta +5
Superconducting high-kinetic inductance materials like granular aluminum (grAl) are a versatile part of the circuit quantum electrodynamics (cQED) toolbox, provided their losses at…
Quasiparticle-induced transitions in a fluxonium qubit
Maksim Litskevich, Kesavan Manivannan, Benjamin Byrd +4
Quasiparticles are a prominent decoherence source in superconducting qubits, but their effects are notoriously difficult to isolate in fluxonium. Unlike the transmon, fluxonium is…
A transmon qubit realized by exploiting the superconductor-insulator transition
C. G. L. Bøttcher, E. Önder, T. Connolly +8
Superconducting qubits are among the most promising platforms for realizing practical quantum computers. One requirement to create a quantum processor is nonlinearity, which in sup…
Effect of quasiparticles on the parameters of a gap-engineered transmon
Daniil S. Antonenko, Pavel D. Kurilovich, Francisco J. Matute-Cañadas +1
We evaluate the quasiparticle contribution to the frequency shift and relaxation rates of a transmon with the Josephson junctions connecting superconductors that have unequal energ…
Quasiparticle-induced decoherence of a driven superconducting qubit
Mykola Kishmar, Pavel D. Kurilovich, Andrey Klots +3
We develop a theory for two quasiparticle-induced decoherence mechanisms of a driven superconducting qubit. In the first mechanism, an existing quasiparticle (QP) tunnels across th…
Full characterization of measurement-induced transitions of a superconducting qubit
Thomas Connolly, Pavel D. Kurilovich, Vladislav D. Kurilovich +12
Repeated quantum non-demolition measurement is a cornerstone of quantum error correction protocols. In superconducting qubits, the speed of dispersive state readout can be enhanced…
Characterization of drive-induced unwanted state transitions in superconducting circuits
W. Dai, S. Hazra, D. K. Weiss +11
Microwave drives are essential for implementing control and readout operations in superconducting quantum circuits. However, increasing the drive strength eventually leads to unwan…
Andreev spin qubit protected by Franck-Condon blockade
P. D. Kurilovich, T. Vakhtel, T. Connolly +2
Andreev levels localized in a weak link between two superconductors can trap a superconducting quasiparticle. If there is a spin-orbit coupling in the link, the spin of the quasipa…
Recovery dynamics of a gap-engineered transmon after a quasiparticle burst
Heekun Nho, Thomas Connolly, Pavel D. Kurilovich +4
Ionizing radiation impacts create bursts of quasiparticle density in superconducting qubits. These bursts temporarily degrade qubit coherence which can be detrimental for quantum e…
High-frequency readout free from transmon multi-excitation resonances
Pavel D. Kurilovich, Thomas Connolly, Charlotte G. L. Bøttcher +12
Quantum computation will rely on quantum error correction to counteract decoherence. Successfully implementing an error correction protocol requires the fidelity of qubit operation…
Nonlinearity of transparent SNS weak links decreases sharply with length
Valla Fatemi, Pavel D. Kurilovich, Anton R. Akhmerov +1
Superconductor-normal material-superconductor (SNS) junctions are being integrated into microwave circuits for fundamental and applied research goals. The short junction limit is a…
On-demand population of Andreev levels by their ionization in the presence of Coulomb blockade
Pavel D. Kurilovich, Vladislav D. Kurilovich, Aleksandr E. Svetogorov +3
A mechanism to deterministically prepare a nanowire Josephson junction in an odd parity state is proposed. The mechanism involves population of two Andreev levels by a resonant mic…
Tunneling of fluxons via a Josephson resonant level
T. Vakhtel, P. D. Kurilovich, M. Pita-Vidal +3
Fluxons in a superconducting loop can be coherently coupled by quantum phase slips occurring at a weak link such as a Josephson junction. If Cooper pair tunneling at the junction o…
Coexistence of nonequilibrium density and equilibrium energy distribution of quasiparticles in a superconducting qubit
Thomas Connolly, Pavel D. Kurilovich, Spencer Diamond +5
The density of quasiparticles typically observed in superconducting qubits exceeds the value expected in equilibrium by many orders of magnitude. Can this out-of-equilibrium quasip…
Distinguishing parity-switching mechanisms in a superconducting qubit
Spencer Diamond, Valla Fatemi, Max Hays +8
Single-charge tunneling is a decoherence mechanism affecting superconducting qubits, yet the origin of excess quasiparticle excitations (QPs) responsible for this tunneling in supe…
Microwave susceptibility observation of interacting many-body Andreev states
V. Fatemi, P. D. Kurilovich, M. Hays +10
Electrostatic charging affects the many-body spectrum of Andreev states, yet its influence on their microwave properties has not been elucidated. We developed a circuit quantum ele…
Stabilizing the Laughlin state of light: dynamics of hole fractionalization
Pavel D. Kurilovich, Vladislav D. Kurilovich, José Lebreuilly +1
Particle loss is the ultimate challenge for preparation of strongly correlated many-body states of photons. An established way to overcome the loss is to employ a stabilization set…
Microwave response of an Andreev bound state
Pavel D. Kurilovich, Vladislav D. Kurilovich, Valla Fatemi +2
We develop a theory for the dynamics of an Andreev bound state hosted by a weak link of finite length for which charging effects are important. We derive the linear response of bot…
Quantum-critical dynamics of a Josephson junction at the topological transition
Vladislav D. Kurilovich, Chaitanya Murthy, Pavel D. Kurilovich +3
We find the admittance of a Josephson junction at or near a topological transition. The dependence of the admittance on frequency and temperature at the critical point is un…
Energy spectrum and current-phase relation of a nanowire Josephson junction close to the topological transition
Chaitanya Murthy, Vladislav D. Kurilovich, Pavel D. Kurilovich +3
A semiconducting nanowire proximitized by an -wave superconductor can be tuned into a topological state by an applied magnetic field. This quantum phase transition is marked by…
Comment on "Noise in the helical edge channel anisotropically coupled to a local spin"
I. S. Burmistrov, P. D. Kurilovich, V. D. Kurilovich
Comment on the paper by K. E. Nagaev, S. V. Remizov, D. S. Shapiro, Noise in the helical edge channel anisotropically coupled to a local spin, JETP Lett. 108, 664 (2018).
Unrestricted electron bunching at the helical edge
Pavel D. Kurilovich, Vladislav D. Kurilovich, Igor S. Burmistrov +2
A quantum magnetic impurity of spin at the edge of a two-dimensional time reversal invariant topological insulator may give rise to backscattering. We study here the shot noise…
Dissipative and Hall viscosity of a disordered 2D electron gas
I. S. Burmistrov, M. Goldstein, M. Kot +2
We study the dissipative and Hall viscosity of a disordered noninteracting 2D electrons, both analytically and numerically. Analytically, we employ the self-consistent Born approxi…
Helical edge transport in the presence of a magnetic impurity: the role of local anisotropy
V. D. Kurilovich, P. D. Kurilovich, I. S. Burmistrov +1
Helical edge modes of 2D topological insulators are supposed to be protected from time-reversal invariant elastic backscattering. Yet substantial deviations from the perfect conduc…