25 papers · ranked by Valyu relevance
Bastian Hacker, Kevin Günthner, Conrad Rößler, Christoph Marquardt
We report on a novel phase-locking technique for fiber-based Mach-Zehnder interferometers based on discrete single-photon detections, and demonstrate this in a setup. Our interferometer decodes relative-phase-encoded optical pulse pairs for quantum key distribution applications and requires no locking laser in addition…
Vojtěch Švarc, Martina Nováková, Michal Dudka, Miroslav Ježek
We report a single-photon Mach-Zehnder interferometer stabilized to a phase precision of 0.05 degrees over 15 hours. To lock the phase, we employ an auxiliary reference light at a different wavelength than the quantum signal. The developed phase locking operates continuously, with negligible crosstalk, and for an…
Arno Klenke, Michael Müller, Henning Stark, Andreas Tünnermann + 1 more
'Jens Limpert'] Abstract: We present a novel phase locking scheme for the coherent combination of beam arrays in the filled aperture configuration. Employing a phase dithering mechanism for the different beams similar to LOCSET, dithering frequencies for sequential combination steps are reused. By applying an…
Kunjan D. Rana, Lucia M. Vaina, Matti S. Hämäläinen
Human perception, cognition, and action are supported by a complex network of interconnected brain regions. There is an increasing interest in measuring and characterizing these networks as a function of time and frequency, and inter-areal phase locking is often used to reveal these networks. This measure assesses the…
Ralf Kohlhaas, Andréa Bertoldi, Etienne Cantin, A. Aspect + 2 more
'Arnaud Landragin' 'Philippe Bouyer'] The sensitivity of an atomic interferometer increases when the phase evolution of its quantum superposition state is measured over a longer interrogation interval. In practice, a limit is set by the measurement process, which returns not the phase, but its projection in terms of…
Simon Mahler, Matthew L. Goh, Chene Tradonsky, Asher A. Friesem + 1 more
'Nir Davidson'] An arrangement based on a degenerate cavity laser for forming an array of non-linearly coupled lasers with an intra-cavity saturable absorber is presented. More than 30 lasers were spatially phase locked and temporally Q-switched. The arrangement with nonlinear coupling was found to be 25 times more…
Shouguo Gao, John L Hartman IV, Justin L Carter, Martin J Hessner + 1 more
'Xujing Wang'] Background In nonlinear dynamic systems, synchrony through oscillation and frequency modulation is a general control strategy to coordinate multiple modules in response to external signals. Conversely, the synchrony information can be utilized to infer interaction. Increasing evidence suggests that…
Authors not listed
A framework for catalysis based on categorical aperture selection rather than temporal acceleration is presented. Traditional catalysis theory describes catalysts as agents that accelerate reactions by lowering activation energies, implicitly treating time as the fundamental variable and reaction rate enhancement as…
Mareike J. Hülsemann, Dr. rer. nat, Ewald Naumann, Dr. rer. nat + 1 more
Phase-amplitude coupling is a promising construct to study cognitive processes in electroencephalography (EEG) and magnetencephalography (MEG). Due to the novelty of the concept, various measures are used in the literature to calculate phase-amplitude coupling. Here, performance of the three most widely used…
Zhiwen Song, Ye Wu, Weiqing Liu, Jinghua Xiao + 1 more
It has recently been observed in numerical simulations that the phases of two coupled nonlinear oscillators can become locked into an irrational ratio, exhibiting the phenomenon of irrational phase synchronization (IPS) [Phys. Rev. E 69, 056228 (2004)]. Here, using two coupled nonidentical periodic mechanical…
Min Ming, Jingyi Zhang, Huizong Duan, Zhu Li + 5 more
'Liangcheng Tu' 'Hsien-Chi Yeh' 'Christian Vollaire' 'Alfio Dario Grasso'] A phasemeter as a readout system for the inter-satellite laser interferometer in a space-borne gravitational wave detector requires not only high accuracy but also insensitivity to amplitude fluctuations and a large fast-acquiring range. The…
Colin G. McNamara, Max Rothwell, Andrew Sharott
Normal brain function is associated with an assortment of oscillations of various frequencies, each reflecting the timing of separate computational processes and levels of synchronization within and between brain areas. Stimulation accurately delivered on a specified phase of a given oscillation provides the…
Christopher K. Kovach
—A number of popular measures of dependence between pairs of band-limited signals rely on analytic phase. A common misconception is that the dependence revealed by these measures must be specific to the spectral range of the filtered input signals. Implicitly or explicitly, obtaining analytic phase involves normalizing…
Authors not listed
Tandem mass spectrometry (MS/MS) fragmentation is conventionally understood as stochastic bond cleavage determined by thermochemical bond strengths and collision energies. We demonstrate that fragmentation is a deterministic categorical state progression governed by phase-lock network topology, where fragment…
Lucas Wetzel, David J. Jörg, Alexandros Pollakis, Wolfgang Rave + 3 more
'Gerhard Fettweis' 'Frank Jülicher' 'Jun Ma'] Self-organized synchronization occurs in a variety of natural and technical systems but has so far only attracted limited attention as an engineering principle. In distributed electronic systems, such as antenna arrays and multi-core processors, a common time reference is…
Robson Scheffer-Teixeira, Adriano BL Tort
Phase-amplitude coupling between theta and multiple gamma sub-bands hallmarks hippocampal activity and is believed to take part in information routing. More recently, theta and gamma oscillations were also reported to exhibit reliable phase-phase coupling, or n:m phase-locking. The existence of n:m phase-locking…
Authors not listed
Electrons have internal structure, you cannot have spin without internal structure, you cannot have chemistry without spin, computing with out an explicit model for spin has made chemists’ lives hard. We present a deterministic framework for computational chemistry that replaces the probabilistic wave function with a…
Bok Young Kim, Jae K. Jang, Yoshitomo Okawachi, Xingchen Ji + 2 more
'Michal Lipson' 'Alexander L. Gaeta'] The universality of Kerr comb synchronization is demonstrated, extending its scope beyond the soliton regime.
B. Ning, S. Y. Zhang, D. Hou, J. T. Wu + 2 more
The high-precision distribution of optical pulse trains via fibre links has had a considerable impact in many fields. In most published work, the accuracy is still fundamentally limited by unavoidable noise sources, such as thermal and shot noise from conventional photodiodes and thermal noise from mixers. Here, we…
Mehedi Hasan, Abhijit Banerjee, Trevor J. Hall
The optoelectronic oscillator is a delay line oscillator that leverages optical fiber technology to realize the large delay required for low phase noise systems. Spurious sidemodes are an artifact of the delay line oscillator, yet treatments of injection locking of optoelectronic oscillators have relied on the…
Soheil Saghafi, Pejman Sanaei
Resonance and synchronized rhythm are important phenomena and can be either constructive or destructive in dynamical systems in the nature, specifically in biology. There are many examples showing that the human’s body organs must maintain their rhythm in order to function properly. For instance, in the brain…
Vyacheslav Li, Fritz Diorico, Onur Hosten
Lasers with well controlled relative frequencies are indispensable for many applications in science and technology. We present a frequency offset locking method for lasers based on beat frequency discrimination utilizing hybrid electronic LC filters. The method is specifically designed for decoupling the tightness of…
Andrew Harvie, John de Mello
The Open Polarimeter (“Opol”) is a phase-based, high-resolution laser polarimeter formed from a small number of inexpensive optomechanical parts. The complete instrument can be assembled from scratch in two days for less than US$250, using only a 3D-printer and a benchtop milling machine. However despite its low cost…
Takahiro Arai, Kaiichiro Ota, Tetsuro Funato, Kazuo Tsuchiya + 2 more
In human walking, the left and right legs move alternately, half a stride out of phase with each other. Although various parameters, such as stride frequency, stride length, and duty factor, vary with walking speed, the antiphase relationship of the leg motion remains unchanged. This is the case even during running.…
Authors not listed
This article is the second in a two-part tutorial review on electronic spin-dependent dynamics. In Part I, we presented the fundamental theory within the adiabatic Born– Huang framework that describes the interaction between nuclear motion and the elec- tronic (spin and spatial) degrees of freedom. In particular, we…