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Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Entanglement area law in interacting bosons: from Bose-Hubbard, $\phi$4, and beyond
Donghoon Kim, Tomotaka Kuwahara·Nov 4, 2024
The entanglement area law is a universal principle that characterizes the information structure in quantum many-body systems and serves as the foundation for modern algorithms based on tensor network representations. Historically, the area law has be...
Information plane and compression-gnostic feedback in quantum machine learning
Nathan Haboury, Mohammad Kordzanganeh, Alexey A. Melnikov +1 more·Nov 4, 2024
The information plane (Tishby et al. arXiv:physics/0004057, Shwartz-Ziv et al. arXiv:1703.00810) has been proposed as an analytical tool for studying the learning dynamics of neural networks. It provides quantitative insight on how the model approach...
Quantum Entanglement Path Selection and Qubit Allocation via Adversarial Group Neural Bandits
Yingyu Huang, Lei Wang, Jie Xu·Nov 1, 2024
Quantum Data Networks (QDNs) have emerged as a promising framework in the field of information processing and transmission, harnessing the principles of quantum mechanics. QDNs utilize a quantum teleportation technique through long-distance entanglem...
Chasing shadows with Gottesman-Kitaev-Preskill codes
Jonathan Conrad, Jens Eisert, Steven T. Flammia·Oct 31, 2024
We consider the task of performing shadow tomography of a logical subsystem defined via the Gottesman-Kitaev-Preskill (GKP) error correcting code. Our protocol does not require the input state to be a code state but is implemented by appropriate twir...
Assessing non-Gaussian quantum state conversion with the stellar rank
Oliver Hahn, Maxime Garnier, Giulia Ferrini +2 more·Oct 31, 2024
State conversion is a fundamental task in quantum information processing. Quantum resource theories allow for analyzing and bounding conversions that use restricted sets of operations. In the context of continuous-variable systems, state conversions ...
Nonstabilizerness Enhances Thrifty Shadow Estimation
Datong Chen, Huangjun Zhu·Oct 31, 2024
Shadow estimation is a powerful approach for estimating the expectation values of many observables. Thrifty shadow estimation is a simple variant that is proposed to reduce the experimental overhead by reusing random circuits repeatedly. Although thi...
Error Threshold of SYK Codes from Strong-to-Weak Parity Symmetry Breaking
Jaewon Kim, E. Altman, Jong Yeon Lee·Oct 31, 2024
Quantum error correction (QEC) codes are fundamentally linked to quantum phases of matter: the degenerate ground state manifold corresponds to the code space, while topological excitations represent error syndromes. Building on this concept, the Sach...
Kinetic-inductance-incorporated quantization for accurate Hamiltonian prediction in superconducting circuits
Seong Hyeon Park, Gahyun Choi, Eunjong Kim +6 more·Oct 31, 2024
Recent advances in quantum information processing with superconducting qubits have fueled a growing demand for scaling and miniaturizing circuit layouts. Despite significant progress, predicting the Hamiltonian of complex circuits remains a challengi...
Natural gradient and parameter estimation for quantum Boltzmann machines
Dhrumil Patel, Mark M. Wilde·Oct 31, 2024
Thermal states play a fundamental role in various areas of physics, and they are becoming increasingly important in quantum information science, with applications related to semi-definite programming, quantum Boltzmann machine learning, Hamiltonian l...
Polarization-entangled photon pairs generation from a single lithium niobate waveguide with single poling period.
Xinyue Zhang, Sihui Pei, Ni Yao +4 more·Oct 30, 2024
Polarization-entangled photon pairs are essential sources for photonic quantum information processing. However, generating entangled photon pairs with large detuning via spontaneous parametric down-conversion (SPDC) often requires complex configurati...
Deterministic Generation of Frequency-Bin-Encoded Microwave Photons.
Jiaying Yang, M. Khanahmadi, Ingrid Strandberg +7 more·Oct 30, 2024
A distributed quantum computing network requires a quantum communication channel between spatially separated processing units. In superconducting circuits, such a channel can be implemented based on propagating microwave photons to encode and transfe...
Measurement-Induced Entanglement and Complexity in Random Constant-Depth 2D Quantum Circuits
Max McGinley, Wen Wei Ho, D. Malz·Oct 30, 2024
We analyze the entanglement structure of states generated by random constant-depth two-dimensional quantum circuits, followed by projective measurements of a subset of sites. By deriving a rigorous lower bound on the average entanglement entropy of s...
Statistical Mechanical Mapping and Maximum-Likelihood Thresholds for the Surface Code under Generic Single-Qubit Coherent Errors
Jan Behrends, Benjamin B'eri·Oct 29, 2024
The surface code, one of the leading candidates for quantum error correction, is known to protect encoded quantum information against stochastic, i.e., incoherent errors. The protection against coherent errors, such as from unwanted gate rotations, i...
Stabilizing Non-Abelian Topological Order against Heralded Noise via Local Lindbladian Dynamics
Sanket Chirame, Abhinav Prem, Sarang Gopalakrishnan +1 more·Oct 28, 2024
An important open question for the current generation of highly controllable quantum devices is understanding which phases can be realized as stable steady-states under local quantum dynamics. In this work, we show how robust steady-state phases with...
Pseudochaotic many-body dynamics as a pseudorandom state generator
Wonjun Lee, Hyukjoon Kwon, Gil Young Cho·Oct 28, 2024
Quantum chaos is central to understanding quantum dynamics and is crucial for generating random quantum states, a key resource for quantum information tasks. In this work, we introduce a new class of quantum many-body dynamics, termed pseudochaotic d...
Approaches to Simultaneously Solving Variational Quantum Eigensolver Problems
A. Hutchings, Eric Yarnot, Xinpeng Li +4 more·Oct 28, 2024
The variational quantum eigensolver (VQE), a type of variational quantum algorithm, is a hybrid quantum-classical algorithm to find the lowest-energy eigenstate of a particular Hamiltonian. We investigate ways to optimize the VQE solving process on m...
Enhancing Quantum Key Distribution with Entanglement Distillation and Classical Advantage Distillation
Shin Sun, K. Goodenough, Daniel Bhatti +1 more·Oct 25, 2024
Realizing secure communication between distant parties is one of quantum technology's main goals. Although quantum key distribution promises information-theoretic security for sharing a secret key, the key rate heavily depends on the level of noise i...
Cryogenic optical-to-microwave conversion using Si photonic integrated circuit Ge photodiodes
D. Julien-Neitzert, Edward K. Leung, N. Islam +5 more·Oct 24, 2024
Integrated circuit technology enables the scaling of circuit complexity and functionality while maintaining manufacturability and reliability. Integration is expected to play an important role in quantum information technologies, including in the hig...
A Distributed and Parallel (k, n) QSS Scheme with Verification Capability
Theodore Andronikos·Oct 24, 2024
This paper presents a new quantum secret sharing scheme featuring a (k, n) threshold and built-in verification. This innovative protocol takes advantage of entanglement and unfolds in three distinct phases. In anticipation of the coming of the distri...
Simulating quantum chaos without chaos
Andi Gu, Yihui Quek, Susanne F. Yelin +2 more·Oct 23, 2024
Quantum chaos is a quantum many-body phenomenon that is associated with a number of intricate properties, such as level repulsion in energy spectra or distinct scalings of out-of-time ordered correlation functions. In this work, we introduce a novel ...