32 citations · 75 across the 25 of their papers we have counts for
28 papers
Adversarial Attacks and Identity Leakage in De-Identification Systems: An Empirical Study
Felix Rosberg, Cristofer Englund, Eren Erdal Aksoy +1
In this paper, we investigate the impact of adversarial attacks on identity encoders within a realistic de-identification framework. Our experiments show that the transferability o…
An All-van-der-Waals Qubit
Sein Park, Sameia Zaman, Junghyun Kim +19
Advances in solid-state physics, materials science, and device engineering have accelerated the development of superconducting qubits. Among emerging platforms, van der Waals (vdW)…
Bosonic quantum control with a weakly coupled fluxonium qubit
Anaida Ali, Shantanu R. Jha, Shoumik D. Chowdhury +4
Echoed Conditional Displacement (ECD) gates constitute a fundamental building block for quantum control of harmonic oscillator modes. However, bit-flips of the auxiliary qubit rema…
Device characterization of SiSiGe double quantum dots using exchange oscillations in Earth's magnetic field
Holly G. Stemp, Harry Hanlim Kang, Chih Hwan Yang +6
Exchange-based semiconductor qubits encompass a broad family of encodings constructed from singlet- and triplet-like spin states, several of which are compatible with operation at…
Adaptive Spectroscopy of Fast Two-Level-System Dynamics in Superconducting Qubits
Fabrizio Berritta, David Pahl, Lukas Pahl +15
Parasitic two-level-system (TLS) defects are a major source of energy relaxation and temporal instability in superconducting quantum processors. Our sub-second adaptive spectroscop…
Hardware-efficient erasure-error detection with an integer fluxonium
Junyoung An, Helin Zhang, Jeffrey M. Gertler +13
Erasure-error detection can improve the efficiency of quantum error correction by revealing the times and locations of their error events. In this work, we demonstrate erasure conv…
Numerical Modeling of Quasiparticle-Induced Dissipation in Fluxonium Qubits
Kate Azar, Max Hays, Kyle Serniak
Nonequilibrium quasiparticles (QPs) generated by stray infrared and ionizing radiation can limit the performance of superconducting quantum processors and present challenges for qu…
Enhanced Sensitivity near a Quantum Exceptional Point in the Absence of Engineered Dissipation
Réouven Assouly, Harry Hanlim Kang, Aziza Almanakly +8
Non-Hermitian systems exhibit phenomena absent from Hermitian systems, including exceptional points (EPs), at which two or more eigenvectors coalesce. Conventional implementations…
Driven-dissipative entanglement of distant giant atoms
Aziza Almanakly, Ariadna Soro, Alejandro Vivas-Viaña +15
Quantum interconnects distribute entanglement via controlled light-matter interactions for quantum computing and sensing applications. Many entanglement generation schemes use cohe…
Characterization of Radiation-Induced Errors in Superconducting Qubits Protected with Various Gap-Engineering Strategies
H. Douglas Pinckney, Thomas McJunkin, Alan W. Hunt +26
Impacts from high-energy particles cause correlated errors in superconducting qubits by increasing the quasiparticle density in the vicinity of the Josephson junctions (JJs). Such…
Characterization and Comparison of Energy Relaxation in Fluxonium Qubits
Kate Azar, Lamia Ateshian, Mallika T. Randeria +19
Fluxonium superconducting qubits have demonstrated long coherence times and high single- and two-qubit gate fidelities, making them a favorable building block for superconducting q…
Distinguishing types of correlated errors in superconducting qubits
Hannah P. Binney, H. Douglas Pinckney, Kate Azar +15
Errors in superconducting qubits that are correlated in time and space can pose problems for quantum error correction codes. Radiation from cosmic and terrestrial sources can incre…
ZZ-Free Two-Transmon CZ Gate Mediated by a Fluxonium Coupler
Junyoung An, Helin Zhang, Qi Ding +19
Eliminating residual ZZ interactions in a two-qubit system is essential for reducing coherent errors during quantum operations. In a superconducting circuit platform, coupling two…
Kinetic Inductance of Few-Layer NbSe in the Two-Dimensional Limit
Sameia Zaman, Joel Î-j. Wang, Thomas Werkmeister +19
Van der Waals (vdW) superconductors remain superconducting down to the monolayer limit, enabling the exploration of emergent physical phenomena and functionality driven by reduced…
Probing Sensitivity near a Quantum Exceptional Point using Waveguide Quantum Electrodynamics
Aziza Almanakly, Reouven Assouly, Harry Hanlim Kang +8
Non-Hermitian Hamiltonians with complex eigenenergies are useful tools for describing the dynamics of open quantum systems. In particular, parity and time (PT) symmetric Hamiltonia…
Emergent Harmonics in Josephson Tunnel Junctions Due to Series Inductance
Junghyun Kim, Max Hays, Ilan T. Rosen +11
Josephson tunnel junctions are essential elements of superconducting quantum circuits. The operability of these circuits presumes a -periodic sinusoidal potential of a tunnel j…
Temperature and Magnetic-Field Dependence of Energy Relaxation in a Fluxonium Qubit
Lamia Ateshian, Max Hays, David A. Rower +14
Noise from material defects at device interfaces is known to limit the coherence of superconducting circuits, yet our understanding of the defect origins and noise mechanisms remai…
Theory of quasiparticle generation by microwave drives in superconducting qubits
Shoumik Chowdhury, Max Hays, Shantanu R. Jha +4
Microwave drives play a central role in the control of superconducting quantum circuits, enabling qubit gates, readout, and parametric interactions. As the drive frequencies are ty…
Non-degenerate noise-resilient superconducting qubit
Max Hays, Junghyun Kim, William D. Oliver
We propose a superconducting qubit based on engineering the first and second harmonics of the Josephson energy and phase relation and . By constructin…
Qubit-State Purity Oscillations from Anisotropic Transverse Noise
David A. Rower, Kotaro Hida, Lamia Ateshian +13
We explore the dynamics of qubit-state purity in the presence of transverse noise that is anisotropically distributed in the Bloch-sphere XY plane. We perform Ramsey experiments wi…
Remote Entangling Gates for Spin Qubits in Quantum Dots using a Charge-Sensitive Superconducting Coupler
Harry Hanlim Kang, Ilan T. Rosen, Max Hays +2
We propose a method to realize microwave-activated CZ gates between two remote spin qubits in quantum dots using a charge-sensitive superconducting coupler. The qubits are longitud…
Deterministic remote entanglement using a chiral quantum interconnect
Aziza Almanakly, Beatriz Yankelevich, Max Hays +13
Quantum interconnects facilitate entanglement distribution between non-local computational nodes. For superconducting processors, microwave photons are a natural means to mediate t…
Suppressing Counter-Rotating Errors for Fast Single-Qubit Gates with Fluxonium
David A. Rower, Leon Ding, Helin Zhang +12
Qubit decoherence unavoidably degrades the fidelity of quantum logic gates. Accordingly, realizing gates that are as fast as possible is a guiding principle for qubit control, nece…
Superfluid Stiffness and Flat-Band Superconductivity in Magic-Angle Graphene Probed by cQED
Miuko Tanaka, Joel Î-j. Wang, Thao H. Dinh +16
The physics of superconductivity in magic-angle twisted bilayer graphene (MATBG) is a topic of keen interest in moiré systems research, and it may provide insight into the pairing…