Article
Physics, Multidisciplinary
Yuzuru Kato, Hiroya Nakao
Summary: This study focuses on enhancing quantum synchronization of a van der Pol oscillator with a harmonic drive through continuous homodyne measurement and feedback control. It introduces a feedback policy for suppressing measurement-induced fluctuations and demonstrates that maximum enhancement of quantum synchronization is achieved through quantum measurement on the oscillator's quadrature angle with the largest phase diffusion.
NEW JOURNAL OF PHYSICS
(2021)
Article
Optics
Parvinder Solanki, Noufal Jaseem, Michal Hajdusek, Sai Vinjanampathy
Summary: This article investigates the synchronization problem in quantum systems using the Liouville space perturbation theory. By analyzing the eigenspectrum of the Liouville superoperator, the conditions for synchronization are determined, and a powerful relationship between energy conservation, degeneracies, and synchronization in quantum systems is derived.
Article
Physics, Multidisciplinary
Yoshihiko Arita, Stephen H. Simpson, Graham D. Bruce, Ewan M. Wright, Pavel Zemanek, Kishan Dholakia
Summary: By studying the rotation of birefringent microspheres trapped in vacuum and set into rotation by circularly polarised light, the authors explain the stable translational motion exhibited by these spheres. They demonstrate that fast rotation reduces the effect of azimuthal spin forces, resulting in nano-scale limit cycles at reduced pressures. This research has implications for designing high-stability rotors with enhanced centripetal loads and improving cooling methods for autonomous limit cycle oscillations, potentially leading to the study of non-equilibrium quantum effects.
COMMUNICATIONS PHYSICS
(2023)
Article
Optics
Parvinder Solanki, Faraz Mohd Mehdi, Michal Hajdusek, Sai Vinjanampathy
Summary: In this paper, the authors discuss the impact of synchronization measures and Hamiltonian symmetries on synchronization blockade. They use counting principles to prove that synchronization blockade cannot be observed in an N-level system when the coherent state used to define the diagonal limit-cycle state is in the full SU(N) group. The authors also provide several examples of synchronization blockade in multilevel systems and show that information-theoretic measures of synchronization can also observe synchronization-blockade-like behavior by choosing the appropriate set of limit-cycle states.
Article
Physics, Multidisciplinary
Haibo Qiu, Yuanjie Dong, Huangli Zhang, Jing Tian
Summary: This paper investigates the measure synchronization in hybrid quantum-classical systems. The dynamics of the classical subsystem is described by the Hamiltonian equations, while the dynamics of the quantum subsystem is governed by the Schrodinger equation. By increasing the coupling strength between the quantum and classical subsystems, the existence of measure synchronization in coupled quantum-classical dynamics under energy conservation for the hybrid systems is revealed.
Article
Physics, Multidisciplinary
Manju, Shubhrangshu Dasgupta, Asoka Biswas
Summary: In this study, we propose an optomechanical model to investigate the correlation between entanglement and quantum synchronization of mechanical oscillators. We demonstrate that, in the presence of amplitude modulation, the mechanical oscillators achieve nearly complete quantum synchronization and entanglement simultaneously in the steady state. Our findings indicate that entanglement has a catalytic effect on quantum synchronization in the specific system we considered.
Article
Engineering, Chemical
Gombojav O. Ariunbold
Summary: This article discusses whether the collective behavior of quantum particles can be explained by quantum synchronization. The author presents a possible explanation and discusses relevant studies.
Article
Physics, Multidisciplinary
Yuan Shen, Hong Yi Soh, Leong-Chuan Kwek, Weijun Fan
Summary: This paper proposes using classical and quantum Fisher information as alternative metrics to detect and measure quantum synchronization. The connection between Fisher information and quantum synchronization is established, showing that both classical and quantum Fisher information can be used as more general indicators of quantum phase synchronization. Advantages in Fisher information-based measures, especially in 2-to-1 synchronization, are demonstrated. Furthermore, the impact of noise on synchronization measures is analyzed, revealing the robustness and susceptibility of each method in the presence of dissipation and decoherence.
Article
Optics
Yuan Shen, Wai-Keong Mok, Changsuk Noh, Ai Qun Liu, Leong-Chuan Kwek, Weijun Fan, Andy Chia
Summary: This article proposes a new approach to quantum synchronization by using an approximate model of the Duffing-van der Pol oscillator. It captures interesting phenomena in the deep-quantum strongly nonlinear regime, such as amplitude death on resonance and nonlinearity-induced position correlations.
Article
Physics, Multidisciplinary
Salvatore Lorenzo, Benedetto Militello, Anna Napoli, Roberta Zambrini, G. Massimo Palma
Summary: We study the emergence of synchronisation in a chiral network of harmonic oscillators. By cascaded coupling and locally incoherently pumped oscillators, a feedback-less dissipative interaction between the oscillators is achieved. The results show that the onset of synchronisation depends strongly on the network topology, with synchronised communities emerging in complex networks.
NEW JOURNAL OF PHYSICS
(2022)
Article
Optics
Alexander Lohrmann, Aileen Zhai, Makan Mohageg
Summary: We present a time synchronization method for correlating photon arrival times in quantum communication. The method uses a low-power synchronization beacon that shares the quantum channel and is detected using the same single-photon detectors already present in the system. Experimental results show that the system jitter approaches the resolution limit with minimal impact on the quantum channel, making the method suitable for long distance quantum communication with large clock drifts.
Article
Physics, Multidisciplinary
Yuzuru Kato, Hiroya Nakao
Summary: Synchronization of quantum nonlinear oscillators has been recently studied. A fully quantum-mechanical definition of the asymptotic phase was proposed to characterize the quantum oscillatory dynamics. Multiple asymptotic phases were introduced using the eigenoperators of the adjoint Liouville superoperator of the quantum nonlinear oscillator. The phase locking of the system with a harmonic drive at multiple different frequencies can be interpreted as synchronization on a torus rather than a simple limit cycle, which is a distinct quantum signature observed only in the strong quantum regime.
NEW JOURNAL OF PHYSICS
(2023)
Article
Quantum Science & Technology
Liang Wang, Wei Zhang, Shutian Liu, Shou Zhang, Hong-Fu Wang
Summary: In this study, we investigate the ground state cooling and quantum synchronization of mechanical and low-frequency inductor-capacitor (LC) resonators in a hybrid optoelectromechanical system. We find that incorporating a bias voltage modulation switch allows for simultaneous ground state cooling and quantum synchronization, regardless of the resonators' frequencies. Additionally, we demonstrate that the two resonators must be simultaneously ground state cooled in order to achieve quantum synchronization.
EPJ QUANTUM TECHNOLOGY
(2023)
Article
Quantum Science & Technology
Davide Scalcon, Costantino Agnesi, Marco Avesani, Luca Calderaro, Giulio Foletto, Andrea Stanco, Giuseppe Vallone, Paolo Villoresi
Summary: The robust implementation of quantum key distribution requires precise state generation, measurements, and optimal encoding. This study presents a cross-encoded scheme that achieves high accuracy quantum state generation and transmission through a self-compensating polarization modulator. The system demonstrates good and stable performance in terms of key and quantum bit error rates, and represents an important step towards the development of hybrid networks with fiber-optic and free-space links.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Physics, Multidisciplinary
Benedetto Militello, Anna Napoli
Summary: The system of two qubits and a resonator, under the influence of various noise sources, reveals the potential for synchronized evolution of the qubits. A direct qubit-qubit interaction and dissipation processes involving the resonator are crucial factors, along with consideration of the detrimental impact of local dephasing of the qubits.
Correction
Chemistry, Applied
M. Rasadujjaman, Y. Wang, L. Zhang, S. Naumov, A. G. Attallah, M. O. Liedke, N. Koehler, M. Redzheb, A. S. Vishnevskiy, D. S. Seregin, Y. Wu, J. Zhang, J. Leu, A. Wagner, K. A. Vorotilov, S. E. Schulz, M. R. Baklanov
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Timofey V. Perevalov, Andrei A. Gismatulin, Andrei E. Dolbak, Vladimir A. Gritsenko, Elena S. Trofimova, Vladimir A. Pustovarov, Dmitry S. Seregin, Konstantin A. Vorotilov, Mikhail R. Baklanov
Summary: The study investigates the charge transport and trap nature responsible for the leakage current in thermally cured methyl-terminated organosilicate low-k dielectric films, revealing that the charge transport occurs via phonon-assisted electron tunneling between neutral traps. The obtained thermal trap energy value is close to that of oxygen divacancies, confirming the presence of oxygen vacancy and divacancy in the studied films. The Nasyrov-Gritsenko model accurately describes the charge transport mechanism, highlighting the importance of oxygen divacancies as traps for the leakage current.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Physics, Condensed Matter
C. Baumgartner, L. Fuchs, A. Costa, Jordi Pico-Cortes, S. Reinhardt, S. Gronin, G. C. Gardner, T. Lindemann, M. J. Manfra, P. E. Faria Junior, D. Kochan, J. Fabian, N. Paradiso, C. Strunk
Summary: The simultaneous breaking of inversion- and time-reversal symmetry in Josephson junction (JJ) leads to anomalous Josephson effect and magnetochiral anisotropy (MCA) of Josephson inductance. The orientation of the current with respect to the lattice affects the MCA, possibly due to a finite Dresselhaus component, and the two-fold symmetry of the Josephson inductance reflects in the activation energy for phase slips.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Nanoscience & Nanotechnology
Christian Baumgartner, Lorenz Fuchs, Andreas Costa, Simon Reinhardt, Sergei Gronin, Geoffrey C. Gardner, Tyler Lindemann, Michael J. Manfra, Paulo E. Faria Junior, Denis Kochan, Jaroslav Fabian, Nicola Paradiso, Christoph Strunk
Summary: This study introduces the design and application of non-reciprocal superconducting devices. By fabricating and measuring Josephson junctions, researchers have successfully achieved rectification of supercurrent and proposed a semi-quantitative model to explain the experimental data.
NATURE NANOTECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
T. Perevalov, A. A. Gismatulin, V. A. Gritsenko, H. Xu, J. Zhang, K. A. Vorotilov, M. R. Baklanov
Summary: This study analyzes four bulk-limited models of charge transport and finds that phonon-assisted electron tunneling can explain the experimental results reasonably, with a thermal trap energy value of 1.2 eV. The trap nature is discussed, as well as a comparison with low-k films prepared using spin-on-glass technology.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Physics, Applied
D. Lopaev, A. Zotovich, S. M. Zyryanov, M. A. Bogdanova, T. Rakhimova, Y. A. Mankelevich, N. N. Novikova, D. S. Seregin, A. S. Vishnevskiy, K. A. Vorotilov, Xiaoping Shi, M. R. Baklanov
Summary: The effects of hydrogen atoms and UV radiation on nanoporous organosilicate glass low-k films were studied. It was found that exposure to hydrogen atoms at low temperature caused slight modification of hydrocarbon bonds in hydrocarbon residues, while high temperature led to the destruction of Si-O and Si-CH2 groups. Additionally, the temperature increase also resulted in slight modification of the matrix structure. UV radiation had almost no effect on these processes.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Sathyan Sandeep, Alexey S. Vishnevskiy, Samuel Raetz, Sergej Naumov, Dmitry S. Seregin, Artem Husiev, Konstantin A. Vorotilov, Vitalyi E. Gusev, Mikhail R. Baklanov
Summary: The characterization of porogen-based organosilicate glass (OGS) films deposited by spin-on-glass technology was carried out using time-domain Brillouin scattering (TDBS). Remarkable differences between the films were revealed through the temporal evolution of the Brillouin frequency (BF) shift in TDBS experiments. The observed modification of the BF was correlated to the amount of carbon residue in the samples, the use of ultraviolet (UV) femtosecond probe laser pulses, and their intensity. The possibility of local modifications of OSG films with a nanometric resolution via nonlinear optical processes was demonstrated.
Article
Materials Science, Multidisciplinary
A. A. Rezvanov, A. S. Vishnevskiy, D. S. Seregin, D. Schneider, A. A. Lomov, K. A. Vorotilov, M. R. Baklanov
Summary: The critical properties of porous periodic mesoporous silica low-k dielectric with different ratios of benzene bridges and methyl terminal groups were studied using advanced instrumentations such as Ellipso-metric Porosimetry, Surface Acoustic Wave Spectroscopy, and Specular X-ray reflectivity. The increase in benzene bridge concentration was found to decrease pore size and surface roughness, increase dielectric constant, and improve mechanical properties. Additionally, a percolation-type behavior of Young's modulus was observed with a sharp increase near a 50 mol % concentration of the benzene bridge.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Physics, Applied
Alexander O. Serov, Alexey N. Ryabinkin, Alexey S. Vishnevskiy, Sergej Naumov, Alexander F. Pal, Tatyana V. Rakhimova, Dmitry S. Seregin, Konstantin A. Vorotilov, Mikhail R. Baklanov
Summary: The degradation of a porous organosilicate glass low-k dielectric during ionized physical vapor deposition of tantalum coating is mainly caused by vacuum UV flux from the argon inductively coupled plasma, not by direct current magnetron sputter plasma. The damage is associated with the removal of carbon-containing groups and breaking of Si-O bonds, resulting in the formation of hydrophilic Si-OH and Si-H groups. Therefore, the degree of damage can exceed expectations.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Chemistry, Multidisciplinary
Md Rasadujjaman, Jinming Zhang, Dmitry A. Spassky, Sergej Naumov, Alexey S. Vishnevskiy, Konstantin A. Vorotilov, Jiang Yan, Jing Zhang, Mikhail R. Baklanov
Summary: The UV-induced photoluminescence of organosilica films with specific chemical groups was studied to understand the nature and origin of optically active defects. It was found that the sources of luminescence were carbon-containing components and carbon residues formed during the sample preparation process. A good correlation between the photoluminescence peaks and chemical composition was observed. The intensity of photoluminescence increased with porosity and internal surface area, and additional bands appeared after annealing, indicating changes in the matrix and segregation of residues on the surface.
Review
Materials Science, Coatings & Films
Mikhail R. Baklanov, Konstantin P. Mogilnikov, Alexey S. Vishnevskiy
Summary: The review article provides an overview of important techniques for evaluating the porosity of thin films. These methods include ellipsometric porosimetry (EP), positron annihilation spectroscopy (PAS/PALS), and grazing incidence small-angle x-ray scattering (GISAXS). The article highlights the challenges and limitations of each method and demonstrates their unique insights into pore structure. The cross-evaluation of different methods enhances understanding of complex pore structures and emphasizes the importance of appropriate data modeling and interpretation.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Materials Science, Multidisciplinary
Md Rasadujjaman, Jinming Zhang, Alexey S. Vishnevskiy, Jing Zhang, Mikhail R. Baklanov
Summary: Eu-doped periodic mesoporous organosilicate (PMO) films have been successfully synthesized using sol-gel technology and spin-coating. The Eu doping alters the properties of the films and introduces luminescence emission. This study is significant for the development of novel functional organosilica materials.
Article
Engineering, Electrical & Electronic
Alexey Zotovich, Sergey M. Zyryanov, Dmitry Lopaev, Askar A. Rezvanov, Ahmed G. Attallah, Maciej O. Liedke, Maik Butterling, Maria A. Bogdanova, Alexey S. Vishnevskiy, Dmitry S. Seregin, Dmitry A. Vorotyntsev, Alexander P. Palov, Eric Hirschmann, Andreas Wagner, Sergej Naumov, Konstantin A. Vorotilov, Tatyana Rakhimova, Alexander T. Rakhimov, Mikhail R. Baklanov
Summary: This study investigates the modification of spin-on-deposited porous PMO ultralow-k SiCOH films by vacuum ultraviolet (VUV) emission. The results show that the VUV exposure process can be divided into two phases, with the first phase resulting in the removal of surface methyl and matrix bridging groups. This leads to increased material porosity. In the second phase, there is an increase in mesopore size, which is masked by air exposure.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Physics, Multidisciplinary
Ralf Fischer, Jordi Pico-Cortes, Wolfgang Himmler, Gloria Platero, Milena Grifoni, Dmitriy A. Kozlov, N. N. Mikhailov, Sergey A. Dvoretsky, Christoph Strunk, Dieter Weiss
Summary: This article investigates the topological transition in Josephson junctions based on topological insulator nanowires under different magnetic flux. The results show that the supercurrent is largely trivial at lower magnetic fields, but topological 4pi-periodic supercurrents start to appear at higher magnetic fields.
PHYSICAL REVIEW RESEARCH
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
I. S. Ovchinnikov, D. S. Seregin, D. A. Abdullaev, K. A. Vorotilov, A. A. Rezvanov, V. A. Gvozdev, T. Blomberg, A. A. Veselov, M. R. Baklanov
Summary: The mechanical properties of low-k dielectric films deposited on a surface with patterned metal lines were evaluated using atomic force microscopy in PeakForce quantitative mapping mode. The Young's modulus of completely cured low-k films was found to depend on the position in the structure, decreasing with reduction of intermetal gap. A significant reduction in Young's modulus was observed near the interface between the metal and low-k, possibly due to poor adhesion between the low-k film and barrier layers and a decrease in effective network connectivity of silicon atoms.
IITC2021: 2021 IEEE INTERNATIONAL INTERCONNECT TECHNOLOGY CONFERENCE (IITC)
(2021)