43 citations · 91 across the 29 of their papers we have counts for
14 papers · 1 filter
A Boundary Condition Perspective on Circuit QED Dispersive Readout
Mustafa Bakr
Boundary conditions in confined geometries and measurement interactions in quantum mechanics share a common structural role: both select a preferred basis by determining which stat…
The Zero-Frequency Limit of Spherical Cavity Modes: On the Formal Endpoint at v=1
Mustafa Bakr, Smain Amari
The transverse magnetic (TM) modes of a spherical cavity satisfy a dispersion relation connecting the angular eigenvalue to the resonant frequency through zeros of the spherica…
Group-Theoretical Origin of the Sectoral-Tesseral-Zonal Trichotomy in Spherical Harmonics
Mustafa Bakr, Smain Amari
The spherical harmonics fall into three families -- sectoral (), tesseral (), and zonal () -- which exhibit fundamentally different be…
Electromagnetic Modes in Spherical Cavities: Complete Theory of Angular Spectra, Dispersion Relations, and Self-Adjoint Extensions
Mustafa Bakr, Tongyu Zhang, Smain Amari
We present a complete theory of electromagnetic modes in spherical cavities, resolving fundamental questions about the nature of angular quantization. The standard result that angu…
Crosstalk Dispersion and Spatial Scaling in Superconducting Qubit Arrays
Mohammed Alghadeer, Simon Pettersson Fors, Shuxiang Cao +5
Crosstalk between qubits fundamentally limits the scalability of quantum processors, necessitating physics-based models that can handle the complexity of large qubit arrays. Here,…
Quantum Mechanics in a Spherical Wedge: Complete Solution and Implications for Angular Momentum Theory
Mustafa Bakr, Smain Amari
We solve the stationary Schrödinger equation for a particle confined to a 3D spherical wedge -- the region with D…
Double-Bracket Algorithmic Cooling
Mohammed Alghadeer, Khanh Uyen Giang, Shuxiang Cao +6
Algorithmic cooling shows that it is possible to locally reduce the entropy of a qubit belonging to an isolated ensemble such as nuclear spins in molecules or nitrogen-vacancy cent…
Intrinsic Multi-Mode Interference for Passive Suppression of Purcell Decay in Superconducting Circuits
Mustafa Bakr, Mohammed Alghadeer, Simon Pettersson Fors +6
Decoherence due to radiative decay remains an important consideration in scaling superconducting quantum processors. We introduce a passive, interference-based methodology for supp…
Full Vectorial Maxwell Equations with Continuous Angular Indices
Mustafa Bakr
This article presents a mathematical framework for solving Maxwell's equations in cylindrical and spherical geometries with continuous angular indices. We extend beyond standard di…
Long-Range Entangling Operations via Josephson Junction Metasurfaces
Mustafa Bakr
We present a framework for implementing two-qubit entangling operations between distant superconducting qubits using a space-time modulated Josephson junction metasurface. By modul…
Low Crosstalk in a Scalable Superconducting Quantum Lattice
Mohammed Alghadeer, Shuxiang Cao, Simone D Fasciati +5
Superconducting quantum circuits are a key platform for advancing quantum information processing and simulation. Scaling efforts currently encounter challenges such as Josephson-ju…
Properties of Building Blocks Comprising Strongly Interacting Posts and Their Consideration in Advanced Coaxial Filter Designs
Smain Amari, Mustafa Bakr, Uwe Rosenberg
Building blocks containing strongly coupled posts offer new possibilities for advanced coaxial (comb-line) filter designs. Equivalent circuits based on the individual resonances of…
Theory of Azimuthally Propagating Electromagnetic Waves in Cylindrical Cavities
Mustafa Bakr, Smain Amari
The paper presents a detailed study of azimuthally propagating electromagnetic waves in cylindrical metallic cavities with circular cross section. Dispersion characteristics of the…
Characterization of Nanostructural Imperfections in Superconducting Quantum Circuits
Mohammed Alghadeer, Simone D Fasciati, Shuxiang Cao +7
Decoherence in superconducting quantum circuits, caused by loss mechanisms like material imperfections and two-level system (TLS) defects, remains a major obstacle to improving the…