Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Optimal adaptation of surface-code decoders to local noise
A. Darmawan·Mar 13, 2024
Information obtained from noise characterization of a quantum device can be used in classical decoding algorithms to improve the performance of quantum error-correcting codes. Focusing on the surface code under local (i.e. single-qubit) noise, we pre...
Stabilizer ground states for simulating quantum many-body physics: theory, algorithms, and applications
Jiace Sun, Lixue Cheng, Shi-Xin Zhang·Mar 13, 2024
Stabilizer states, which are also known as the Clifford states, have been commonly utilized in quantum information, quantum error correction, and quantum circuit simulation due to their simple mathematical structure. In this work, we apply stabilizer...
Experimental realization of universal quantum gates and a six-qubit entangled state using a photonic quantum walk
Kanad Sengupta, S. Dinesh, K. Shafi +2 more·Mar 11, 2024
For quantum computation using photons, performing deterministic quantum gate operations is a challenge due to the probabilistic nature of the photon-photon interaction. Encoding qubits in multiple degrees-of-freedom of photons and controlling operati...
Critical quantum metrology robust against dissipation and non-adiabaticity
Jia-Hao Lü, Wen Ning, Fan Wu +6 more·Mar 7, 2024
Critical systems near quantum phase transitions were predicted to be useful for improvement of metrological precision, thanks to their ultra-sensitive response to a tiny variation of the control Hamiltonian. Despite the promising perspective, realiza...
Complexity-Constrained Quantum Thermodynamics
Anthony Munson, N. B. T. Kothakonda, J. Haferkamp +3 more·Mar 7, 2024
Quantum complexity measures the difficulty of realizing a quantum process, such as preparing a state or implementing a unitary. We present an approach to quantifying the thermodynamic resources required to implement a process if the process’s complex...
Quantum Algorithm for Reversing Unknown Unitary Evolutions
Yuanyi Chen, Yin Mo, Yingjian Liu +2 more·Mar 7, 2024
Reversing an unknown quantum evolution is of central importance to quantum information processing and fundamental physics, yet it remains a formidable challenge as conventional methods necessitate an infinite number of queries to fully characterize t...
Highly stable power control for chip-based continuous-variable quantum key distribution system.
Yiming Bian, Yang Li, Xuesong Xu +7 more·Mar 7, 2024
Quantum key distribution allows secret key generation with information theoretical security. It can be realized with photonic integrated circuits to benefit the tiny footprints and the large-scale manufacturing capacity. Continuous-variable quantum k...
Error Correction in Dynamical Codes
Esther Xiaozhen Fu, Daniel Gottesman·Mar 7, 2024
We ask what is the general framework for a quantum error correcting code that is defined by a sequence of measurements. Recently, there has been much interest in Floquet codes and space-time codes. In this work, we define and study the distance of a ...
Parameterized quantum comb and simpler circuits for reversing unknown qubit-unitary operations
Yin Mo, Lei Zhang, Yuanyi Chen +3 more·Mar 6, 2024
Quantum combs play a vital role in characterizing and transforming quantum processes, with wide-ranging applications in quantum information processing. However, obtaining the explicit quantum circuit for the desired quantum comb remains a challenging...
Scrambling transition in free fermion systems induced by a single impurity
Qucheng Gao, T. Zhou, Pengfei Zhang +1 more·Mar 6, 2024
In quantum many-body systems, interactions play a crucial role in the emergence of information scrambling. When particles interact throughout the system, the entanglement between them can lead to a rapid and chaotic spreading of quantum information, ...
An Operational Framework for Nonclassicality in Quantum Communication Networks
Brian Doolittle, Felix Leditzky, Eric Chitambar·Mar 5, 2024
Quantum resources, such as entanglement or quantum communication, offer significant communication advantages in information processing. We develop an operational framework for realizing these communication advantages in resource-constrained quantum n...
Local Quantum Search Algorithm for Random $k$-SAT with $\Omega(n^{1+\epsilon})$ Clauses
Mingyou Wu·Mar 5, 2024
The random k-SAT instances undergo a"phase transition"from being generally satisfiable to unsatisfiable as the clause number m passes a critical threshold, $r_k n$. This causes a drastic reduction in the number of satisfying assignments, shifting the...
Demonstrating Efficient and Robust Bosonic State Reconstruction via Optimized Excitation Counting
Tanjung Krisnanda, C. Fontaine, Adrian Copetudo +6 more·Mar 5, 2024
Quantum state reconstruction is an essential element in quantum information processing. However, efficient and reliable reconstruction of nontrivial quantum states in the presence of hardware imperfections can be challenging. This task is particularl...
Quantum Algorithms in a Superposition of Spacetimes
Omri Shmueli·Mar 5, 2024
Quantum computers are expected to revolutionize our ability to process information. The advancement from classical to quantum computing is a product of our advancement from classical to quantum physics -- the more our understanding of the universe gr...
Quantum Mixed-State Self-Attention Network
Fu Chen, Qinglin Zhao, Li Feng +3 more·Mar 5, 2024
Attention mechanisms have revolutionized natural language processing. Combining them with quantum computing aims to further advance this technology. This paper introduces a novel Quantum Mixed-State Self-Attention Network (QMSAN) for natural language...
High-rate 16-node quantum access network based on passive optical network
Ya Pan, Yiming Bian, Yang Li +12 more·Mar 5, 2024
Quantum key distribution can provide information-theoretical secure communication, which is now heading towards building the quantum secure network for real-world applications. In most built quantum secure networks, point-to-multipoint (PTMP) topolog...
Computing exact moments of local random quantum circuits via tensor networks
Paolo Braccia, Pablo Bermejo, L. Cincio +1 more·Mar 4, 2024
A basic primitive in quantum information is the computation of the moments EU[Tr[UρU†O]t]\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \use...
Strategies and trade-offs for controllability and memory time of ultra-high-quality microwave cavities in circuit QED
I. Pietikainen, Ondvrej vCernot'ik, A. Eickbusch +4 more·Mar 4, 2024
Three-dimensional microwave cavity resonators have been shown to reach lifetimes of the order of a second by maximizing the cavity volume relative to its surface, using better materials, and improving surface treatments. Such cavities represent an id...
Advancing quantum networking: some tools and protocols for ideal and noisy photonic systems
J. Saied, Jeffrey Marshall, Namit Anand +2 more·Mar 4, 2024
Quantum networking at many scales will be critical to future quantum technologies and experiments on quantum systems. Photonic links enable quantum networking. They will connect co-located quantum processors to enable large-scale quantum computers, p...
Microwave‐to‐Optics Conversion Using Magnetostatic Modes and a Tunable Optical Cavity
Wei‐Jiang Wu, Yi‐Pu Wang, Jie Li +2 more·Mar 1, 2024
Quantum computing, quantum communication, and quantum networks rely on hybrid quantum systems operating in different frequency ranges. For instance, the superconducting qubits work in the gigahertz range, while the optical photons used in communicati...