Article
Materials Science, Multidisciplinary
Ali A. Abu-Nada, Moataz A. Salhab
Summary: In an open quantum system, the noise induced by the environment is often assumed to be the reason for the disappearance of quantum properties. However, Barreiro et al. (2011) experimentally demonstrate that an engineered and controlled environment state can actually pump an arbitrary quantum system towards maximal entanglement, making it a resource for quantum information processing. To validate this idea, we simulate a quantum circuit on one of the IBM Q processors, aiming to pump an arbitrary maximally mixed state into a Greenberger-Horne-Zeilinger (GHZ) state. We propose a different circuit structure tailored for the IBM Q platform due to the limitations of the available circuits offered by Barreiro et al. (2011).
RESULTS IN PHYSICS
(2023)
Article
Quantum Science & Technology
Gary J. Mooney, Gregory A. L. White, Charles D. Hill, Lloyd C. L. Hollenberg
Summary: This study investigates the ability to prepare large-scale entangled quantum states on current superconducting quantum devices, with the application of quantum readout-error mitigation (QREM) to enhance observed entanglement levels. The results show full bipartite entanglement in two of the largest superconducting devices to date, indicating promising progress in generating entanglement in noisy intermediate-scale quantum (NISQ) devices.
ADVANCED QUANTUM TECHNOLOGIES
(2021)
Article
Computer Science, Information Systems
Uzi Pereg, Christian Deppe, Holger Boche
Summary: This study focuses on communication over a quantum channel that depends on a quantum state, where the encoder has channel side information and is required to mask information on the quantum channel state from the decoder. A full characterization is established for the entanglement-assisted masking equivocation region, and a regularized formula is given for the quantum capacity-leakage function without assistance. For Hadamard channels without assistance, single-letter inner and outer bounds are derived, coinciding in the standard case of a channel that does not depend on a state.
IEEE TRANSACTIONS ON INFORMATION THEORY
(2021)
Article
Computer Science, Information Systems
Ho-Joon Kim, Soojoon Lee, Ludovico Lami, Martin B. Plenio
Summary: In this study, the dynamic resource theory of quantum entanglement was formulated using the superchannel theory, with separable channels and free superchannels identified as free resources, and swap channels chosen as dynamic entanglement golden units. The main results showed that the one-shot dynamic entanglement cost and distillable dynamic entanglement of a bipartite quantum channel under free superchannels are bounded by specific criteria involving channel robustness and resource monotones. Furthermore, the one-shot catalytic dynamic entanglement cost under a larger class of free superchannels was found to be limited by the generalized log-robustness of channels.
IEEE TRANSACTIONS ON INFORMATION THEORY
(2021)
Article
Computer Science, Information Systems
Uzi Pereg, Christian Deppe, Holger Boche
Summary: In this study, a new model of unreliable entanglement assistance is introduced for communication systems. The sender is unaware of whether the entangled photon has reached the receiver, while the receiver knows the success of entanglement generation. The effective transmission rate is adapted based on the assistance status in this model.
IEEE TRANSACTIONS ON INFORMATION THEORY
(2023)
Article
Quantum Science & Technology
Jieyu Zhang, Yu Luo, Yongming Li
Summary: The resource theory of imaginarity provides a valuable framework for understanding the role of complex numbers. This article introduces the concepts of imaginaring and deimaginaring power of quantum channels to describe their ability to create and destroy imaginarity. The properties of non-imaginarity-generating channels are investigated, and the trade-off relationship between imaginarity and entanglement is explored. The creation of imaginarity in a bipartite state is also studied.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Physics, Multidisciplinary
Waldemar Klobus, Marek Miller, Mahasweta Pandit, Ray Ganardi, Lukas Knips, Jan Dziewior, Jasmin Meinecke, Harald Weinfurter, Wieslaw Laskowski, Tomasz Paterek
Summary: The study introduces an information-theoretic quantifier to measure the advantage gained from cooperation and the degree of dependency between subsystems of a global system. This quantifier can be directly applied to classical as well as quantum systems and is computed by comparing the conditional mutual information between any two subsystems. Results demonstrate the benefits of using the new quantifier for symmetric quantum secret sharing, and prove the lack of monotonicity of conditional mutual information under local operations.
NEW JOURNAL OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
Bartosz Regula, Ryuji Takagi
Summary: The study develops a unified framework for characterizing one-shot transformations of dynamical quantum resources, establishing universal conditions for exact and approximate transformations in general resource theories. The framework encompasses all dynamical resources represented as quantum channels and can be applied to a wide range of physical settings. Through specific applications to quantum communication, the study provides exact expressions for one-shot quantum capacity and simulation cost, as well as to non-locality, contextuality, and measurement incompatibility.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Haowei Shi, Quntao Zhuang
Summary: This paper investigates the role of quantum entanglement in optical multiple-access communications. Computable limits on communication for both entanglement-assisted and unassisted scenarios are provided. It is proven that Gaussian entanglement achieves the optimal total rate in optical communication and can be efficiently evaluated.
Article
Engineering, Electrical & Electronic
Yauhen Yakimenka, Hsuan-Yin Lin, Eirik Rosnes, Jorg Kliewer
Summary: This study proposes to improve the download rates of uncoded files on a single server by relaxing the conditions of perfect retrievability and privacy. Information leakage is measured using average success probability, and closed-form expressions for the optimal tradeoff are provided. A novel approach based on linear programming is also introduced for constructing schemes.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Christopher W. Lynn, Danielle S. Bassett
Summary: By modeling networks as information sources and compressing them using rate-distortion theory, the study investigates the compressibility and characteristics of networks. The results show that compressibility is positively correlated with the transitivity and degree heterogeneity of the networks.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Quantum Science & Technology
Paul Boes, Nelly H. Y. Ng, Henrik Wilming
Summary: The study comprehensively explores the application of variance of surprisal in (quantum) information theory and finds that it can be used to derive genuine approximate state transition conditions in the single-shot setting. It also clarifies its relation to entropy and proposes a monotone for resource theories. Certain properties of the variance of surprisal are determined, which are useful for further investigations.
Article
Engineering, Electrical & Electronic
Matteo Allaix, Seunghoan Song, Lukas Holzbaur, Tefjol Pllaha, Masahito Hayashi, Camilla Hollanti
Summary: This paper studies the capacity of QPIR from MDS-coded and colluding servers for the first time. Two general classes of QPIR, stabilizer QPIR and dimension-squared QPIR, are defined and their capacities are derived. The general QPIR capacity is derived for the non-colluding case. The proposed capacity-achieving scheme combines different schemes from previous research.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2022)
Article
Optics
Abbas Poshtvan, Vahid Karimipour
Summary: We study the capacities of a two-parameter family of qubit Pauli channels, finding exact expressions and boundaries for the classical capacity, entanglement-assisted capacities, quantum capacity, and private capacity. Using a flag extension method, we determine upper and lower bounds for the quantum and private capacities and make progress towards determining the capacities of the full Pauli channel.
Article
Physics, Multidisciplinary
Qi Liu, Ling-Na Wu, Jia-Hao Cao, Tian-Wei Mao, Xin-Wei Li, Shuai-Feng Guo, Meng Khoon Tey, Li You
Summary: The study presents a method applicable to cyclic systems for implementing nonlinear interferometry without requiring time reversal. By utilizing quasiperiodic spin mixing dynamics in a three-mode Rb-87 atomic spinor condensate, a closed-loop nonlinear interferometer is achieved, leading to a significant metrological gain.
Article
Computer Science, Information Systems
Samad Khabbazi Oskouei, Stefano Mancini, Andreas Winter
Summary: Passive environment-assisted communication is investigated in terms of information transmission capabilities. Gaussian unitaries acting on Bosonic systems are considered for both quantum and classical communication. Coding theorems are proved, and an uncertainty-type relation between the classical capacities of the sender and the helper is derived, providing lower bounds on the classical information transmission rate.
IEEE TRANSACTIONS ON INFORMATION THEORY
(2022)
Article
Computer Science, Information Systems
Zahra Baghali Khanian, Andreas Winter
Summary: This paper discusses the compression problem of the most general finite-dimensional quantum mechanical information source and determines the optimal compression rate based on the Koashi-Imoto decomposition.
IEEE TRANSACTIONS ON INFORMATION THEORY
(2022)
Article
Computer Science, Information Systems
Farzin Salek, Andreas Winter
Summary: This study proposes new protocols for converting noisy multipartite quantum correlations into noiseless classical and quantum ones using local operations and classical communication. It introduces a new lower bound on the distillable common randomness and derives two lower bounds on the distillation of Greenberger-Horne-Zeilinger states. The research contributes to the field of quantum information theory.
IEEE TRANSACTIONS ON INFORMATION THEORY
(2022)
Article
Computer Science, Information Systems
Markus Grassl, Felix Huber, Andreas Winter
Summary: The article presents a robust proof of the quantum Singleton bound for quantum error-correcting codes using von Neumann entropy inequalities. It rectifies a previous error and provides tight bounds on the entanglement-communication tradeoff for entanglement-assisted quantum error-correcting codes. The article also discusses the different forms of bounds depending on the minimum distance.
IEEE TRANSACTIONS ON INFORMATION THEORY
(2022)
Article
Physics, Multidisciplinary
Zahra Baghali Khanian, Manabendra Nath Bera, Arnau Riera, Maciej Lewenstein, Andreas Winter
Summary: We extend the previous results on quantum thermodynamics to the case of multiple non-commuting charges and develop a resource theory of thermodynamics for asymptotically many non-interacting systems. The phase diagram of the system is formed by associating the vector of expected charge values and entropy with every state. Our key result is the Asymptotic Equivalence Theorem, which connects the equivalence classes of states under asymptotic charge-conserving unitaries with the points on the phase diagram. Using the phase diagram, we analyze the first and second laws of thermodynamics and provide insights into the storage of different charges in physically separate batteries.
ANNALES HENRI POINCARE
(2023)
Article
Nanoscience & Nanotechnology
Beihan Zhao, Vishal Sankar Sivasankar, Swarup Kumar Subudhi, Abhijit Dasgupta, Siddhartha Das
Summary: In this study, we demonstrated the humidity-sensing ability and robustness of syringe-printed single-walled carbon nanotube-graphene oxide (SWCNT-GO) traces on adhesive and flexible PET thin films. The printed traces showed high humidity sensitivity and could be deployed on surfaces with different curvatures. The SWCNT-GO traces exhibited enhanced humidity sensitivity due to the hygroscopic swelling of GO flakes under humid conditions. Furthermore, the traces demonstrated long-term stability and reliable performance even after temperature cycling tests.
ACS APPLIED NANO MATERIALS
(2023)
Article
Physics, Mathematical
Aram W. W. Harrow, Saeed Mehraban
Summary: In this study, we prove that poly(t) . n(1/D)-depth local random quantum circuits with two qudit nearest-neighbor gates on a D-dimensional lattice with n qudits are approximate t-designs in various measures. We also improve the scrambling and decoupling bounds for spatially local random circuits and show that sampling within total variation distance from these circuits is hard for classical computers. Additionally, we demonstrate that O(root n) depth is sufficient for achieving anti-concentration in quantum circuits.
COMMUNICATIONS IN MATHEMATICAL PHYSICS
(2023)
Review
Materials Science, Multidisciplinary
P. Siva Prasad, Bharat C. G. Marupalli, Siddhartha Das, Karabi Das
Summary: Calcium phosphates, such as hydroxyapatite (HAp), are widely used biomaterials for bone tissue repair. Surfactants have been utilized as templates to control the morphology and size of synthetic HAp particles. This review explores the effects of different chemical and biosurfactants on the structural and biological properties of surfactant-assisted HAp particles.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Bhargav Sai Chava, Ghansham Rajendrasingh Chandel, Siddhartha Das
Summary: In this study, we report the entropy-driven filling of mildly hydrophilic boron nitride nanotubes (BNNTs) with water, which is governed by the unique structure and diameter of the nanotubes. The rotational and translational entropy components play a crucial role in the filling process, with the specific contribution depending on the diameter of the BNNTs and the structure of the water molecules.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Computer Science, Information Systems
Manideep Mamindlapally, Andreas Winter
Summary: This article discusses the derivation of Singleton bounds on the performance of entanglement-assisted hybrid classical-quantum error correcting codes using quantum Shannon theoretic methods. It shows that the triple-rate region of possible EACQ codes is contained within the quantum Shannon theoretic rate region of a memoryless erasure channel, which is a polytope. The study demonstrates that a large part of this region can be achieved by certain EACQ codes under certain conditions.
IEEE TRANSACTIONS ON INFORMATION THEORY
(2023)
Correction
Optics
Karol Horodecki, Marek Winczewski, Siddhartha Das
Article
Fisheries
Andreas Winter, Alexander Arkhipkin
Summary: Data from surveys conducted in 2013, 2018, 2019, and 2021 were analyzed to investigate changes in skate biomass in waters around the Falkland Islands. The surveys showed a decrease in estimated commercial-size skate biomass for most species and overall. This decline was observed both in areas closed to skate fishing and those open to target fishing, indicating the impact of bycatch in finfish trawls.
Article
Quantum Science & Technology
Zi-Wen Liu, Andreas Winter
Summary: Understanding and studying the magic in quantum computation and physics is essential to comprehend quantum complexity. This study examines the magic in strongly entangled many-body quantum states, particularly in systems with multiple qubits. The research finds that the maximum magic of an n-qubit state is closely related to the number of qubits, and nearly all pure n-qubit states have magic values close to n. The analysis also connects the magic of hypergraph states with the nonlinearity of Boolean functions and applies the concept of magic to measurement-based quantum computation and condensed matter systems.
Article
Optics
Farzin Salek, Masahito Hayashi, Andreas Winter
Summary: Adaptiveness is a key principle in information processing, and this study investigates its usefulness in asymptotic binary hypothesis testing for quantum channels. The results show that adaptive and nonadaptive strategies have the same error exponents for classical-quantum channels, and adaptive strategies do not outperform nonadaptive strategies when restricted to classical feed-forward and product state channel inputs.
Article
Optics
Karol Horodecki, Marek Winczewski, Siddhartha Das
Summary: In this paper, several general upper bounds on the rate of a key secure against a quantum adversary in the device-independent conference key agreement (DI-CKA) scenario are provided. These bounds include reduced entanglement measures and multipartite secrecy monotones such as reduced c-squashed entanglement. The comparison between the DI-CKA rate and the device-dependent rate is discussed, with examples demonstrating the strict gap inherited from the bipartite gap between device-independent and device-dependent key rates.