Resource theory of quantum scrambling

RJ Garcia, K Bu, A Jaffe - Proceedings of the National …, 2023 - National Acad Sciences
Quantum chaos has become a cornerstone of physics through its many applications. One
trademark of quantum chaotic systems is the spread of local quantum information, which …

Quantum entropy and central limit theorem

K Bu, W Gu, A Jaffe - … of the National Academy of Sciences, 2023 - National Acad Sciences
We introduce a framework to study discrete-variable (DV) quantum systems based on qudits.
It relies on notions of a mean state (MS), a minimal stabilizer-projection state (MSPS), and a …

Statistical complexity of quantum circuits

K Bu, DE Koh, L Li, Q Luo, Y Zhang - Physical Review A, 2022 - APS
In theoretical machine learning, the statistical complexity is a notion that measures the
richness of a hypothesis space. In this work, we apply a particular measure of statistical …

Complexity of quantum circuits via sensitivity, magic, and coherence

K Bu, RJ Garcia, A Jaffe, DE Koh, L Li - Communications in Mathematical …, 2024 - Springer
Quantum circuit complexity—a measure of the minimum number of gates needed to
implement a given unitary transformation—is a fundamental concept in quantum …

Wasserstein complexity of quantum circuits

L Li, K Bu, DE Koh, A Jaffe, S Lloyd - arxiv preprint arxiv:2208.06306, 2022 - arxiv.org
Given a unitary transformation, what is the size of the smallest quantum circuit that
implements it? This quantity, known as the quantum circuit complexity, is a fundamental …

Magic of random matrix product states

L Chen, RJ Garcia, K Bu, A Jaffe - Physical Review B, 2024 - APS
Magic, or nonstabilizerness, characterizes how far away a state is from the stabilizer states,
making it an important resource in quantum computing, under the formalism of the Gotteman …

Entropic quantum central limit theorem and quantum inverse sumset theorem

K Bu, W Gu, A Jaffe - arxiv preprint arxiv:2401.14385, 2024 - arxiv.org
We establish an entropic, quantum central limit theorem and quantum inverse sumset
theorem in discrete-variable quantum systems describing qudits or qubits. Both results are …

Magic can enhance the quantum capacity of channels

K Bu, A Jaffe - arxiv preprint arxiv:2401.12105, 2024 - arxiv.org
We investigate the role of magic in the quantum capacity of channels. We consider the
quantum channel of the recently proposed discrete beam splitter with the fixed environment …

Magic Resource Can Enhance the Quantum Capacity of Channels

K Bu, A Jaffe - Physical Review Letters, 2025 - APS
We investigate the role of magic resource in the quantum capacity of channels. We consider
the quantum channel of the recently proposed discrete beam splitter with the fixed …

Extending Classically Simulatable Bounds of Clifford Circuits with Nonstabilizer States via Framed Wigner Functions

G Park, H Kwon, H Jeong - Physical Review Letters, 2024 - APS
The Wigner function formalism has played a pivotal role in examining the nonclassical
aspects of quantum states and their classical simulatability. Nevertheless, its application in …