Ivan Pechenezhskiy

Syracuse University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Maxim Vavilov

University of Wisconsin–Madison

Konstantin N. Nesterov

University of Wisconsin–Madison

R. McDermott

University of Wisconsin–Madison

Vladimir Manucharyan

University of Maryland, College Park

B. L. T. Plourde

Syracuse University

Long B. Nguyen

Lawrence Berkeley National Laboratory

Yen‐Hsiang Lin

National Tsing Hua University

Michael F. Crommie

University of California, Berkeley

Caleb Howington

Seeqc (United States)

Ray Mencia

Cooperative Institutions

University of Wisconsin–Madison

University of California, Berkeley

Lawrence Berkeley National Laboratory

University of Maryland, College Park

Syracuse University

Joint Quantum Institute

University of Michigan–Ann Arbor

Centre National de la Recherche Scientifique

Yale University

University of California, Santa Barbara

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Non-Dispersive Limit of the Qubit Readout with a Microwave Photon Counter.

Bulletin of the American Physical Society (2018)

Konstantin N. Nesterov Alexander Opremcak Ivan Pechenezhskiy R. McDermott Maxim Vavilov

Source

Cite

Citations (0)

Measurement of a superconducting qubit with a microwave photon counter

Science (2018)

Alex Opremcak Ivan Pechenezhskiy Caleb Howington Bradley Christensen M. A. Beck

Fast, high-fidelity measurement is a key ingredient for quantum error correction. Conventional approaches to the measurement of superconducting qubits, involving linear amplification of a microwave probe tone followed by heterodyne detection at room temperature, do not scale well to large system sizes. Here we introduce an alternative approach to measurement based on a microwave photon counter. We demonstrate raw single-shot measurement fidelity of 92%. Moreover, we exploit the intrinsic damping of the counter to extract the energy released by the measurement process, allowing repeated high-fidelity quantum non-demolition measurements. Crucially, our scheme provides access to the classical outcome of projective quantum measurement at the millikelvin stage. In a future system, counter-based measurement could form the basis for a scalable quantum-to-classical interface.

High fidelity

10.1126/science.aat4625

Cite

Citations (75)

Qubit State Measurement using the Josephson Photomultiplier

Bulletin of the American Physical Society (2018)

Alexander Opremcak Ivan Pechenezhskiy Caleb Howington Bradley Christensen Konstantin N. Nesterov

Source

Cite

Citations (0)

Parity detection of multiple superconducting qubits

Bulletin of the American Physical Society (2017)

Caleb Howington Alex Opremcak Ivan Pechenezhskiy Marius Schöndorf Frank K. Wilhelm

Parity (physics)

Source

Cite

Citations (0)

Two-Qubit Gates with Fluxonium Circuits.

Bulletin of the American Physical Society (2019)

Yinqi Chen Konstantin N. Nesterov Ivan Pechenezhskiy Zhenyi Qi Long B. Nguyen

Source

Cite

Citations (0)

Cryogenic Digital Readout of Superconducting Qubits

Bulletin of the American Physical Society (2018)

Caleb Howington Alexander Opremcak Ivan Pechenezhskiy Maxim Vavilov R. McDermott

Source

Cite

Citations (0)

Microwave-activated controlled- Z gate for fixed-frequency fluxonium qubits

Physical review. A/Physical review, A (2018)

Konstantin N. Nesterov Ivan Pechenezhskiy Chen Wang Vladimir Manucharyan Maxim Vavilov

The superconducting fluxonium circuit is an artificial atom with a strongly anharmonic spectrum: when biased at a half flux quantum, the lowest qubit transition is an order of magnitude smaller in frequency than those to higher levels. Similar to conventional atomic systems, such a frequency separation between the computational and noncomputational subspaces allows independent optimizations of the qubit coherence and two-qubit interactions. Here we describe a controlled-Z gate for two fluxoniums connected either capacitively or inductively, with qubit transitions fixed near 500 MHz. The gate is activated by a microwave drive at a resonance involving the second excited state. We estimate intrinsic gate fidelities over 99.9% with gate times below 100 ns.

10.1103/physreva.98.030301

Cite

Citations (27)

Phonon-Mediated Quasiparticle Poisoning of Superconducting Microwave Resonators

Bulletin of the American Physical Society (2017)

U. Patel Ivan Pechenezhskiy Kenneth Dodge B. L. T. Plourde Maxim Vavilov

Source

Cite

Citations (0)

Modeling phonon-mediated quasiparticle poisoning in superconducting qubit arrays

arXiv (Cornell University) (2024)

E. Yelton C. P. Larson Vito Iaia Kenneth Dodge Guglielmo La Magna

Correlated errors caused by ionizing radiation impacting superconducting qubit chips are problematic for quantum error correction. Such impacts generate quasiparticle (QP) excitations in the qubit electrodes, which temporarily reduce qubit coherence significantly. The many energetic phonons produced by a particle impact travel efficiently throughout the device substrate and generate quasiparticles with high probability, thus causing errors on a large fraction of the qubits in an array simultaneously. We describe a comprehensive strategy for the numerical simulation of the phonon and quasiparticle dynamics in the aftermath of an impact. We compare the simulations with experimental measurements of phonon-mediated QP poisoning and demonstrate that our modeling captures the spatial and temporal footprint of the QP poisoning for various configurations of phonon downconversion structures. We thus present a path forward for the operation of superconducting quantum processors in the presence of ionizing radiation.

10.1103/physrevb.110.024519

Cite

Citations (0)

Towards a fluxonium-based quantum processor II: interacting qubits

Bulletin of the American Physical Society (2019)

Long B. Nguyen Aaron Somoroff Yen‐Hsiang Lin Ray Mencia Ivan Pechenezhskiy

Source

Cite

Citations (0)