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Reduced density matrices (RDMs) are fundamental in quantum information processing, allowing the computation of local observables, such as energy and correlation functions, without the exponential complexity of fully characterizing quantum…

量子物理 · 物理学 2025-06-13 Zherui Jerry Wang , David Dechant , Yash J. Patel , Jordi Tura

Quantum resource theories have been widely studied to systematically characterize the non-classicality of quantum systems. Most resource theories focus on quantum states and study their interconversions. Although quantum channels are…

量子物理 · 物理学 2020-02-19 Yunchao Liu , Xiao Yuan

Quantum information processing is limited, in practice, to efficiently implementable operations. This motivates the study of quantum divergences that preserve their operational meaning while faithfully capturing these computational…

量子物理 · 物理学 2025-09-26 Álvaro Yángüez , Thomas A. Hahn , Jan Kochanowski

The quantum Fisher information (QFI), as a function of quantum states, measures the amount of information that a quantum state carries about an unknown parameter. The (entanglement-assisted) QFI of a quantum channel is defined to be the…

量子物理 · 物理学 2021-04-06 Sisi Zhou , Liang Jiang

We investigate whether one can detect the presence of a quantum resource in some operational task or equivalently whether every quantum resource provides an advantage over its free counterpart in some black box scenarios where one does not…

量子物理 · 物理学 2025-04-10 Shubhayan Sarkar , Chandan Datta

In this paper, we detail an orthogonalization procedure that allows for the quantification of the amount of coherence present an arbitrary superposition of coherent states. The present construction is based on the quantum coherence resource…

量子物理 · 物理学 2017-11-15 Kok Chuan Tan , Tyler Volkoff , Hyukjoon Kwon , Hyunseok Jeong

Information is instrumental in our understanding of thermodynamics. Their interplay has been studied through completely degenerate Hamiltonians whereby the informational contributions to thermodynamic transformations can be isolated. In…

量子物理 · 物理学 2024-04-10 Benjamin Stratton , Chung-Yun Hsieh , Paul Skrzypczyk

Cyber-Physical Systems (CPS) in domains such as manufacturing and energy distribution generate complex time series data crucial for Prognostics and Health Management (PHM). While Deep Learning (DL) methods have demonstrated strong…

机器学习 · 计算机科学 2025-12-16 Alexander Windmann , Henrik Steude , Daniel Boschmann , Oliver Niggemann

Non-stabilizerness or magic resource characterizes the amount of non-Clifford operations needed to prepare quantum states. It is a crucial resource for quantum computing and a necessary condition for quantum advantage. However, quantifying…

量子物理 · 物理学 2023-01-31 Tobias Haug , M. S. Kim

Quantum resource theories (QRTs) provide a comprehensive and practical framework for the analysis of diverse quantum phenomena. A fundamental task within QRTs is the quantification of resources inherent in a given quantum state. In this…

量子物理 · 物理学 2025-06-12 Xuanran Zhu , Chao Zhang , Zheng An , Bei Zeng

Quantum resource theories (QRTs) provide a unified framework to analyze quantum properties as resources for achieving advantages in quantum information processing. The generalized robustness and the weight of resource have been gaining…

量子物理 · 物理学 2024-04-24 Kohdai Kuroiwa , Ryuji Takagi , Gerardo Adesso , Hayata Yamasaki

Recent studies have introduced the worst-case quantum divergence as a key measure in quantum information. Here we show that such divergences can be understood from the perspective of the resource theory of asymmetric distinguishability,…

量子物理 · 物理学 2025-10-06 Siqi Yao , Kun Fang

A central challenge in quantum information science and technology is achieving real-time estimation and feedforward control of quantum systems. This challenge is compounded by the inherent inhomogeneity of quantum resources, such as qubit…

机器学习 · 计算机科学 2024-05-28 Linsen Li , Pratyush Anand , Kaiming He , Dirk Englund

The asymmetry of quantum states is an important resource in quantum information processing tasks such as quantum metrology and quantum communication. In this paper, we introduce the notion of $asymmetry~weight$ --- an operationally…

量子物理 · 物理学 2018-05-23 Kaifeng Bu , Namit Anand , Uttam Singh

We present methods that can provide an exponential savings in the resources required to perform dynamic parameter estimation using quantum systems. The key idea is to merge classical compressive sensing techniques with quantum control…

量子物理 · 物理学 2015-06-16 Easwar Magesan , Alexandre Cooper , Paola Cappellaro

Understanding the role of correlations in quantum systems is both a fundamental challenge as well as of high practical relevance for the control of multi-particle quantum systems. Whereas a lot of research has been devoted to study the…

量子物理 · 物理学 2015-07-16 Ángel Rivas , Markus Müller

Quantum coherence is one of the fundamental properties of quantum mechanics and also acts as a valuable resource for a variety of practical applications, which includes quantum computing and quantum information processing. Evaluating the…

量子物理 · 物理学 2024-09-16 Yikang Zhu , Zhaofeng Su

A variety of tasks in quantum control, ranging from purification and cooling, to quantum stabilization and open-system simulation, rely on the ability to implement a target quantum channel over a specified time interval within prescribed…

量子物理 · 物理学 2017-08-29 Francesco Ticozzi , Lorenza Viola

We introduce, for any bipartite Bell scenario, a measure that quantifies both the amount of nonlocality and the efficiency in device-independent quantum key distribution of a set of measurement outcomes probabilities. It is a proper measure…

量子物理 · 物理学 2020-11-30 S. Camalet

The measured relative entropies of quantum states and channels find operational significance in quantum information theory as achievable error rates in hypothesis testing tasks. They are of interest in the near term, as they correspond to…

量子物理 · 物理学 2025-10-21 Zixin Huang , Mark M. Wilde