Publications (15)
Experimental error suppression in Cross-Resonance gates via multi-derivative pulse shaping
Boxi Li, Tommaso Calarco, Felix Motzoi
While quantum circuits are reaching impressive widths in the hundreds of qubits, their depths have not been able to keep pace. In particular, cloud computing gates on multi-qubit,…
Suppressing spurious transitions using spectrally balanced pulse
Ruixia Wang, Yaqing Feng, Yujia Zhang +10
Achieving precise control over quantum systems presents a significant challenge, especially in many-body setups, where residual couplings and unintended transitions undermine the a…
Analytical blueprint for 99.999% fidelity X-gates on present superconducting hardware under strong driving
José Diogo Da Costa Jesus, Boxi Li, Yuan Gao +3
Achieving very fast gates that undercut the natural limits set by decoherence requires going into the strong driving limit. Realizing single-qubit control predicted beyond semi-cla…
Leveraging Hardware Power through Optimal Pulse Profiling for Each Qubit Pair
Yuchen Zhu, Jinglei Cheng, Boxi Li +3
In the scaling development of quantum computers, the calibration process emerges as a critical challenge. Existing calibration methods, utilizing the same pulse waveform for two-qu…
Improving Single Excitation Fidelity in Rydberg Superatoms for Efficient Single Photon Emission
Vidisha Aggarwal, Boxi Li, Eloisa Cuestas +4
Deterministic single photon emission from a Rydberg ensemble coupled to an optical cavity requires high-fidelity preparation of collective single excitations. In such a setup imper…
Counterdiabatic Driving under Variational Frame Dressing
Boxi Li, Franco Nori, Felix Motzoi
The paper develops a variational dressed‑frame formalism for counterdiabatic driving that maps auxiliary control fields onto experimentally available operations, enabling faster an…
Coqa: Blazing Fast Compiler Optimizations for QAOA
Yuchen Zhu, Yidong Zhou, Jinglei Cheng +4
The Quantum Approximate Optimization Algorithm (QAOA) is one of the most promising candidates for achieving quantum advantage over classical computers. However, existing compilers…
QuTiP 5: The Quantum Toolbox in Python
Neill Lambert, Eric Giguère, Paul Menczel +15
QuTiP, the Quantum Toolbox in Python, has been at the forefront of open-source quantum software for the past 13 years. It is used as a research, teaching, and industrial tool, and…
Universal pulses for superconducting qudit ladder gates
Boxi Li, F. A. Cárdenas-López, Adrian Lupascu +1
Qudits, generalizations of qubits to multi-level quantum systems, offer enhanced computational efficiency by encoding more information per lattice cell, avoiding costly swap operat…
Pulse-level noisy quantum circuits with QuTiP
Boxi Li, Shahnawaz Ahmed, Sidhant Saraogi +4
The study of the impact of noise on quantum circuits is especially relevant to guide the progress of Noisy Intermediate-Scale Quantum (NISQ) computing. In this paper, we address th…
Tools for quantum network design
Koji Azuma, Stefan Bäuml, Tim Coopmans +2
Quantum networks will enable the implementation of communication tasks with qualitative advantages with respect to the communication networks we know today. While it is expected th…
Fault Models in Superconducting quantum circuits
Qifan Huang, Boxi Li, Minbo Gao +1
Fault models are indispensable for many EDA tasks, so as for design and implementation of quantum hardware. In this article, we propose a fault model for superconducting quantum sy…
Non-perturbative analytical diagonalization of Hamiltonians with application to coupling suppression and enhancement in cQED
Boxi Li, Tommaso Calarco, Felix Motzoi
Deriving effective Hamiltonian models plays an essential role in quantum theory, with particular emphasis in recent years on control and engineering problems. In this work, we pres…
Efficient optimization of cut-offs in quantum repeater chains
Boxi Li, Tim Coopmans, David Elkouss
Quantum communication enables the implementation of tasks that are unachievable with classical resources. However, losses on the communication channel preclude the direct long-dist…
Simple analytical flux-tuned iSWAP pulses for leakage suppression
Dimitrios Georgiadis, Boxi Li, Asier Galicia +3
Fast, high-fidelity two-qubit gates are a key requirement for fault-tolerant quantum computation. Tunable coupler architectures provide a flexible approach for implementing entangl…