Article
Mathematics, Applied
Hui-Hsiung Kuo, Pujan Shrestha, Sudip Sinha, Padmanabhan Sundar
Summary: The paper aims to prove a near-martingale optional stopping theorem and establish solvability and large deviations for a class of anticipating linear stochastic differential equations. Solutions' existence and uniqueness are demonstrated using two approaches, and a Freidlin-Wentzell type large deviations result is established for the equation's solution. Large deviation results are also proven for small noise with random initial conditions.
INFINITE DIMENSIONAL ANALYSIS QUANTUM PROBABILITY AND RELATED TOPICS
(2023)
Article
Quantum Science & Technology
Saverio Francesconi, Claudia De Lazzari, Domenico Ribezzo, Ilaria Vagniluca, Nicola Biagi, Tommaso Occhipinti, Alessandro Zavatta, Davide Bacco
Summary: Quantum key distribution (QKD), which exchanges cryptographic keys exploiting the laws of quantum physics, is already a reality. However, current implementations based on attenuated lasers have limitations in terms of stability and scalability. This work demonstrates a novel scheme for implementing a reconfigurable and scalable QKD transmitter based on time-bin encoding and decoy-state employing phase-randomized weak states.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Astronomy & Astrophysics
Truong Xuan Pham
Summary: This paper establishes the constructions of conformal scattering theories for tensorial wave equations on Schwarzschild spacetime. The method combines Penrose's conformal compactification and the energy decay results of tensorial fields to prove the energy equality of the fields through the conformal boundary and the initial Cauchy hypersurface. The well-posedness of the Goursat problem is proven using a generalization of Hörmander's results.
CLASSICAL AND QUANTUM GRAVITY
(2023)
Article
Astronomy & Astrophysics
A. A. Araujo Filho, J. Furtado, J. A. A. S. Reis, J. E. G. Silva
Summary: This work analyzes the thermodynamic properties of non-interacting particles under the influence of the gravitational field of a traversable wormhole. The study investigates how the thermodynamic quantities are affected by the Ellis wormhole geometry in three different regions. The results show that the thermodynamic state quantities exhibit significant changes by varying the parameter controlling the wormhole throat radius, displaying behaviors similar to both usual matter and dark energy. Additionally, the interactions seem to have the potential to cure the dark energy-like features.
CLASSICAL AND QUANTUM GRAVITY
(2023)
Correction
Astronomy & Astrophysics
Oscar Castillo-Felisola, Bastian Grez, Oscar Orellana, Jose Perdiguero, Aureliano Skirzewski, Alfonso R. Zerwekh
CLASSICAL AND QUANTUM GRAVITY
(2023)
Correction
Astronomy & Astrophysics
Ulrich K. Beckering Vinckers, Alvaro de la Cruz-Dombriz, Denis Pollney
CLASSICAL AND QUANTUM GRAVITY
(2023)
Article
Astronomy & Astrophysics
A. Mikovic
Summary: By studying the convergence of the path integral, we have shown that it is possible to construct a finite quantum gravity theory on a piecewise linear spacetime that yields classical general relativity coupled to the standard model.
CLASSICAL AND QUANTUM GRAVITY
(2023)
Article
Quantum Science & Technology
Jianming Zhou, Xiaoli Hu, Naihuan Jing
Summary: By quantifying the difference between quantum mutual information through weak measurement on a subsystem, the notion of super quantum discord is introduced. The super version is found to be difficult to compute, similar to the quantum discord captured by strong measurements. Effective bounds for the super quantum discord with or without phase damping channels in higher-dimensional bipartite quantum states are provided, and it is found that the super version is always larger than the usual quantum discord in the 2-dimensional case.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Astronomy & Astrophysics
F. D. Lora-Clavijo, G. D. Prada-Mendez, L. M. Becerra, E. A. Becerra-Vergara
Summary: This work investigates the possibility of a naked singularity at the center of the Milky Way and provides evidence supporting the idea through data fitting and shadow observation.
CLASSICAL AND QUANTUM GRAVITY
(2023)
Article
Quantum Science & Technology
Mikka Stasiuk, Felix Hufnagel, Xiaoqin Gao, Aaron Z. Goldberg, Ebrahim Karimi, Khabat Heshami, Frederic Bouchard
Summary: This paper discusses two protocols used in quantum key distribution, the round-robin differential phase shift protocol (RRDPS) and high-dimensional (HD) QKD, and explores the method of extending RRDPS QKD to an arbitrarily large encoding alphabet and its implications for security.
Correction
Astronomy & Astrophysics
James Healy, Carlos O. Lousto, Hiroyuki Nakano, Yosef Zlochower
CLASSICAL AND QUANTUM GRAVITY
(2023)
Article
Quantum Science & Technology
Guo-Dong Li, Wen-Chuan Cheng, Qing-Le Wang, Jia-Cheng Liu
Summary: This paper proposes a feasible measurement device independent multi-party quantum key agreement protocol with identity authentication, based on BB84 polarization states and GHZ entangled states. The proposed protocol ensures security, fairness, and feasibility of key generation by restricting participation to authenticated individuals.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Quantum Science & Technology
Yiran Wang, Yongming Li
Summary: This paper investigates the quantification of magic and introduces a suitable magic measure that is generalized to multi-dimensional quantum systems. By calculating relevant magic states and comparing with other measures, the applicability of this measure is demonstrated. A tighter upper bound is obtained using group covariant symmetric informationally complete (SIC) states, and the measure is extended to mixed states.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Quantum Science & Technology
Gang Yang, Yan-Xia Huang, Shi Rao
Summary: In this study, we investigate quantum steering and quantum entanglement in a hybrid cavity optomechanical system. It is found that by adjusting the system parameters, the direction of quantum steering can be altered, and it is possible to achieve quantum entanglement at higher temperature.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Astronomy & Astrophysics
Mariela Masso Reid, Karen Haughian, Alan Cumming, James Faller, Giles Hammond, James Hough, Anna-Maria van Veggel, Sheila Rowan
Summary: This paper investigates the thermal conductivity of hydroxide catalysis bonds in gravitational wave detectors and concludes that the use of hydroxide catalysis bonding has minimal impact on the required heat extraction for cryogenic operation. Therefore, it remains an attractive solution for building future cryogenic instruments with reduced thermal noise and enhanced astrophysical reach.
CLASSICAL AND QUANTUM GRAVITY
(2023)
Article
Astronomy & Astrophysics
T. Thiemann
Summary: This paper demonstrates the exact quantization of the U(1)(3) model and shows that the quantum constraints can be solved precisely using groupoid averaging. The solution serves as an ideal testing ground for general spin foam models.
CLASSICAL AND QUANTUM GRAVITY
(2023)
Article
Astronomy & Astrophysics
Adam J. Peterson, Don Willcox, Philipp Mosta
Summary: This article presents a new code generator based on python/SymPy for producing executable numerical expressions to solve partial differential equations. The generator is applied to the constraint damped and conformal Z4 formulations in 3+1 ADM numerical relativity. The generated solvers are tested for stability and accuracy and applied to physically interesting vacuum spacetimes and gravitational waveforms.
CLASSICAL AND QUANTUM GRAVITY
(2023)
Article
Astronomy & Astrophysics
Wentong Fan, Sijun Fang, Hongwen Hai, Jie Song, Jinhang Zhou, Yuwei Wu, Rurui Zou, Kai Zhao, Rui Zhang, Bohong Li, Jian Luo, Bin He, Minyan Qiu, Lei Fan, Zizheng Li, Hongchao Zhao, Yong Yan
Summary: This paper establishes a computational analysis model and proposes a method to reduce the internal TTL coupling noise of the telescope. By optimizing the telescope optical system, the non-geometric TTL coupling noise has been successfully reduced, providing guidance for the design of telescopes with low coupling noise.
CLASSICAL AND QUANTUM GRAVITY
(2023)
Article
Quantum Science & Technology
Jacob L. Cybulski, Thanh Nguyen
Summary: This paper investigates four countermeasures for dealing with barren plateaus in the training of quantum neural networks and demonstrates their impact on model training, generalization ability, and effective dimension through experiments. The findings are of great significance for guiding the development of quantum models.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Quantum Science & Technology
Wenjie Hu, Chengcheng Bao, Tao Dong
Summary: This paper investigates the dynamics of a quantum duopoly Stackelberg game model and establishes local stability and flip bifurcation conditions by choosing different bifurcation parameters. The obtained results are verified through numerical examples.
QUANTUM INFORMATION PROCESSING
(2023)