Article
Materials Science, Multidisciplinary
Karsten Balzer, Niclas Schluenzen, Hannes Ohldag, Jan-Philip Joost, Michael Bonitz
Summary: Real-time nonequilibrium Green functions (NEGFs) have been successfully used to simulate the dynamics of correlated many-particle systems far from equilibrium. However, NEGF simulations are computationally expensive due to cubic scaling with the simulation duration. A new G1-G2 scheme has been introduced to achieve time-linear scaling and accelerate NEGF embedding simulations, allowing for efficient simplifications when a microscopic resolution of electronic properties is not necessary. Numerical illustrations of charge transfer between a Hubbard nanocluster and an additional site are presented.
Article
Optics
Hyun-Woo Rhee, Joonsup Shim, Jae-Yong Kim, David Juseong Bang, Hyeonho Yoon, Myeongho Kim, Chong Cook Kim, Jong-Bum You, Hyo-Hoon Park
Summary: An inter-chip optical link using direct optical wire bonding by open-to-air polymerization was developed. The DOW bonding showed low insertion loss and a larger wavelength tolerance compared to conventional connections. This study demonstrates the feasibility of out-of-plane connection with edge-coupling devices.
Article
Quantum Science & Technology
Mark Dong, Matthew Zimmermann, David Heim, Hyeongrak Choi, Genevieve Clark, Andrew J. Leenheer, Kevin J. Palm, Alex Witte, Daniel Dominguez, Gerald Gilbert, Matt Eichenfield, Dirk Englund
Summary: We introduce a programmable photonic integrated circuit (PIC) capable of high-speed and high-fidelity reconfigurable optical connections for optically-heralded entanglement among target qubits. The PIC's N x N Mach-Zehnder mesh (MZM) can generate optical connectivity on up to 8 inputs and demonstrated optical connections between 16 independent pairwise mode couplings with high fidelity. This programmable PIC platform enables the fast and scalable optical switching technology necessary for network-based quantum information processors.
NPJ QUANTUM INFORMATION
(2023)
Article
Engineering, Electrical & Electronic
Jennifer Aldama, Samael Sarmiento, Ignacio H. Lopez H. Grande, Stefano Signorini, Luis Trigo Vidarte, Valerio Pruneri
Summary: Quantum key distribution (QKD) and quantum random number generation (QRNG) are crucial for data communication security in the future. Integrating these technologies into a single photonic integrated circuit (PIC) can significantly improve performance and reliability. While current implementations using commercial photonic components are mature, integrating all functionalities into a PIC can reduce size, weight, complexity, cost, and power consumption.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Shan Xiao, Shiyao Wu, Xin Xie, Jingnan Yang, Wenqi Wei, Shushu Shi, Feilong Song, Jianchen Dang, Sibai Sun, Longlong Yang, Yunuan Wang, Sai Yan, Zhanchun Zuo, Ting Wang, Jianjun Zhang, Kuijuan Jin, Xiulai Xu
Summary: Chiral quantum optics has attracted interest in the field of quantum information science. By exploiting spin-polarization properties and engineering rational photonic nanostructures, information can be transformed in compact chiral photonic circuits with deterministic circularly polarized chiral routing and beamsplitting.
LASER & PHOTONICS REVIEWS
(2021)
Article
Physics, Multidisciplinary
Patrick Hayden, Jonathan Sorce
Summary: This article investigates the dynamics of open quantum systems and resolves the non-uniqueness issue of dividing the dynamics into unitary and dissipative parts. For finite-dimensional systems, a norm is specified to uniquely determine the canonical Hamiltonian, which is shown to be equivalent to the Hamiltonian initially defined by Lindblad.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Quantum Science & Technology
Xiaoyan Zhou, Peter Lodahl, Leonardo Midolo
Summary: In this paper, a novel dual-mode photonic-crystal waveguide is proposed for stable and scalable resonant excitation of high-quality quantum dot single-photon sources. Through proper engineering of the photonic bandstructure, efficient collection of highly indistinguishable single photons is achieved over a broad spectral and spatial range.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Article
Quantum Science & Technology
Maria Laura Olivera-Atencio, Lucas Lamata, Jesus Casado-Pascual
Summary: Quantum machine learning (QML), which has the potential to revolutionize data processing, faces challenges from environmental noise and dissipation.While traditional efforts seek to combat these hindrances, this perspective proposes harnessing them for potential advantages.Surprisingly, under certain conditions, noise and dissipation can benefit QML.Adapting to open quantum systems holds potential for groundbreaking discoveries that may reshape the future of quantum computing.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Rajadurai Chandrasekar
Summary: The emergence of molecular crystals as smart nanophotonic components has attracted the attention of scientists, with the development of mechanically flexible crystals requiring challenging micromanipulation methods. The rise of atomic force microscopy has expanded the scope of mechanophotonics and led to the advancement of crystal-based microscale organic photonic integrated circuits. The ability of OPICs to guide, split, couple, and modulate visible electromagnetic radiation using various mechanisms is discussed, with examples from recent literature.
Article
Quantum Science & Technology
Rui Wang, Carlos Hernani-Morales, Jose D. Martin-Guerrero, Enrique Solano, Francisco Albarran-Arriagada
Summary: This paper proposes a machine learning method that characterizes photonic states using a simple optical circuit and data processing of photon number distributions. The trained supervised learning algorithms can predict the degree of entanglement in the photonic states and perform full tomography of photon modes.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Xiangzhong Zeng, Lyuzhou Ye, Daochi Zhang, Rui-Xue Xu, Xiao Zheng, Massimiliano Di Ventra
Summary: Measuring local temperatures of open systems out of equilibrium is a novel approach to study the local thermodynamic properties of nanosystems. An operational protocol has been proposed to determine the unique local temperature by minimizing perturbations to a certain local observable. The influence of quantum resonances on the local temperature in multi-impurity chains under a thermal bias is elucidated through analytical and numerical results.
Article
Materials Science, Multidisciplinary
J. Baetge, Y. Ke, C. Kaspar, M. Thoss
Summary: The hierarchical equations of motion approach allows for numerically exact simulation of nonequilibrium transport in general open quantum systems involving multiple macroscopic environments. The method's performance has been demonstrated in a nanosystem model, showing intricate interplay between electronic and vibrational degrees of freedom in transport processes. Discussions on the use of importance criteria to improve efficiency have also been included.
Article
Physics, Multidisciplinary
Amikam Levy, Eran Rabani, David T. Limmer
Summary: This article introduces a response theory for open quantum systems subject to a Hamiltonian perturbation within nonequilibrium steady states, finding that the system's response to a small perturbation is not simply related to a correlation function within the system. In some limiting cases, a perturbative expansion exists when the perturbation is small relative to the coupling to the surroundings, while in other cases, the secular approximation results in a singular response that can be described by reverting to a microscopic Hamiltonian description.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Jada Ravi, Rajadurai Chandrasekar
Summary: By using a mechanophotonics approach, three flexible organic microcrystals of DPIN were manipulated to fabricate a dual-waveguides coupled ring resonator. These crystals, acting as optical waveguides with low optical loss coefficients, were bent and integrated to form an all-organic crystal-based dual-waveguides coupled ring resonator. The fabricated circuit selectively guided input FL signals through active, passive waveguiding and FL reabsorbance mechanisms.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Optics
Kazuhiro Kuruma, Hironobu Yoshimi, Yasutomo Ota, Ryota Katsumi, Masahiro Kakuda, Yasuhiko Arakawa, Satoshi Iwamoto
Summary: This study reports single-photon sources using single quantum dots embedded in topological slow light waveguides based on valley photonic crystals. The experiment demonstrates Purcell-enhanced single-photon emission in a topological slow light mode with a group index over 20, showing robust propagation even under sharp bends.
LASER & PHOTONICS REVIEWS
(2022)
Review
Physics, Multidisciplinary
Wei-Min Zhang
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2019)
Article
Multidisciplinary Sciences
Md Manirul Ali, Wei-Ming Huang, Wei-Min Zhang
SCIENTIFIC REPORTS
(2020)
Article
Multidisciplinary Sciences
Yu-Juan Sun, Wei-Min Zhang
Summary: The proposed model introduces a physical approach to describe neuron interactions and collective behavior, offering insights into the dynamics and information transmission processes within neuronal systems, potentially paving the way towards a better understanding of nervous system dynamics.
Article
Physics, Multidisciplinary
Chuan-Zhe Yao, Wei-Min Zhang
Summary: In this paper, the non-Markovian quantum transport dynamics of a two-terminal Majorana device made of an asymmetric topological superconducting chain has been investigated. The interference between the left and right Majorana zero modes was found to play a crucial role in the topological phase transition of conductance.
NEW JOURNAL OF PHYSICS
(2022)
Article
Optics
Wei -Ming Huang, Wei -Min Zhang
Summary: In this paper, we investigate the strong-coupling quantum thermodynamics of a hybrid quantum system far from equilibrium. The non-Markovian dynamics of this system have been experimentally explored and theoretically investigated. We apply the renormalization theory of quantum thermodynamics to study the transient quantum heat and work in this system. Our results show that non-Markovian dynamics plays an important role in enhancing the energy conversion of heat and work.
Article
Physics, Multidisciplinary
Yu -Wei Huang, Wei -Min Zhang
Summary: In this paper, we generalize the quantum Brownian motion to include momentum-dependent system-environment couplings. The resulting Hamiltonian in the particle number representation is discussed, and the exact master equation for both initial decoupled and initial correlated states is derived. The renormalized system Hamiltonian after tracing out all environmental states naturally induces a momentum-dependent potential, indicating the consistency of including momentum-dependent coupling in the QBM Hamiltonian.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Physics, Multidisciplinary
Wei-Ming Huang, Wei-Min Zhang
Summary: By solving the exact master equation of open quantum systems, quantum thermodynamics is formulated from weak to strong couplings. The necessity of renormalization for thermodynamic quantities is found, and only with renormalized thermodynamic quantities can the exact steady state of the system be obtained.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Optics
Fei-Lei Xiong, Wei -Min Zhang
Summary: This paper investigates the dynamics of localized bound states in open quantum systems under periodic driving, showing that the driving can modulate or eliminate these states. Conditions for protecting and manipulating these states are identified, with potential applications in controlling quantum states against decoherence.
Article
Materials Science, Multidisciplinary
Fei-Lei Xiong, Hon-Lam Lai, Wei-Min Zhang
Summary: A scheme is proposed to manipulate Majorana qubit states through electron transport and magnetic flux tuning in an Aharonov-Bohm interferometer setup. The Majorana qubit parity can be almost perfectly polarized by adjusting the bias and flipped by changing the sign of cross couplings. The qubit coherence exhibits phase rigidity due to the intrinsic particle-hole symmetry of the Majorana AB interferometer.
Article
Optics
Kai-Ting Chiang, Wei-Min Zhang
Summary: The experiments focus on the hybrid quantum system of a superconducting microwave cavity strongly coupled to an inhomogeneous broadening spin ensemble, using the exact master equation theory to study its non-Markovian decoherence dynamics under external driving fields. The theory generalizes the fluctuation-dissipation relation and describes in detail the transient non-Markovian decoherence, showing how the decoherence induced by the inhomogeneous broadening of the spin ensemble can be suppressed in the strong-coupling regime. This study also explores the relationships between quantum fluctuations and quantum memory through two-time correlations.
Article
Materials Science, Multidisciplinary
Yu-Wei Huang, Pei-Yun Yang, Wei-Min Zhang
Article
Optics
Fei-Lei Xiong, Wei-Min Zhang
Article
Materials Science, Multidisciplinary
Chuan-Zhe Yao, Wei-Min Zhang
Article
Materials Science, Multidisciplinary
Hon-Lam Lai, Wei-Min Zhang
Article
Materials Science, Multidisciplinary
Pei-Yun Yang, Wei-Min Zhang
Article
Physics, Multidisciplinary
G. Mustafa, S. K. Maurya, Saibal Ray, Faisal Javed
Summary: In this study, we investigate the geometry of wormholes in the framework of general relativity and explore how quantum wave dark matter affects the dynamical configuration of the shell surrounding the wormhole. By using specific shape functions and introducing quantum wave dark matter, we obtain reasonable wormhole solutions and observe its effects on the stability of the shell.
Article
Physics, Multidisciplinary
Pritha Dolai, Christian Maes
Summary: Calorimetry for equilibrium systems aims to determine the energy levels' occupation and distribution by measuring thermal response, while nonequilibrium versions provide additional information on the dynamical accessibility of these states. Using calculations on a driven exclusion process, it is confirmed that a fermionic nonequilibrium steady state with exact computation of specific heat can be achieved. The divergence at zero temperature occurs when the Fermi energy and the kinetic barrier for loading and emptying are approximately equal. Additionally, a stable low temperature regime of negative specific heat appears when the kinetic barrier is density-dependent, indicating an anti-correlation between the stationary occupation's temperature-dependence and excess heat.
Article
Physics, Multidisciplinary
F. F. Nascimento, V. B. Bezerra, J. M. Toledo
Summary: We obtained the metric of the Hayward black hole surrounded by a cloud of strings, and analyzed the effects of the string cloud on the regularity of the solution and the energy conditions. Various aspects such as horizons, geodesics, effective potential, and thermodynamics were investigated. We compared the obtained results with the literature corresponding to the Hayward black hole without a string cloud.
