24 papers · ranked by Valyu relevance
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…
Thibault Wildi, Alexander E. Ulanov, Thibault Voumard, Bastian Ruhnke + 1 more
'Bastian Ruhnke' 'Tobias Herr'] Microresonator frequency combs (microcombs) hold great potential for precision metrology within a compact form factor, impacting a wide range of applications such as point-of-care diagnostics, environmental monitoring, time-keeping, navigation and astronomy. Through the principle of…
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…
Daniel R. Schonhaut, Ashwin G. Ramayya, Ethan A. Solomon, Nora A. Herweg + 2 more
Memory formation depends on neural activity across a network of regions, including the hippocampus and broader medial temporal lobe (MTL). Interactions between these regions have been studied indirectly using functional MRI, but the bases for inter-regional communication at a cellular level remain poorly understood.…
Daniel Štěrba, Jaroslav Novotný, Igor Jex
The paper concerns spontaneous asymptotic phase-locking and synchronization in two-qubit systems undergoing continuous Markovian evolution described by Lindbladian dynamics with normal Lindblad operators. Using analytic methods, all phase-locking-enforcing mechanisms within the given framework are obtained and…
Tim A. Guth, Armin Brandt, Peter C. Reinacher, Andreas Schulze-Bonhage + 2 more
The precise timing of single-neuron activity in relation to local field potentials may support various cognitive functions. Extensive research in rodents, along with some evidence in humans, suggests that single-neuron activity at specific phases of theta oscillations plays a crucial role in memory processes. Our…
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…
Michael Rosenblum, Arkady Pikovsky
We review an approach for reconstructing oscillatory networks’ undirected and directed connectivity from data. The technique relies on inferring the phase dynamics model. The central assumption is that we observe the outputs of all network nodes. We distinguish between two cases. In the first one, the observed signals…
Tim A. Guth, Armin Brandt, Peter C. Reinacher, Andreas Schulze-Bonhage + 2 more
'Andreas Schulze-Bonhage' 'Joshua Jacobs' 'Lukas Kunz'] Memory processes may rely on complex interactions between single-neuron activity and local field potentials. To better understand such spike-field relationships in humans, we examined human theta-phase locking-neuronal firing at similar theta phases over…
Graham Flick, Jed Meltzer, Jennifer D. Ryan, Rosanna K. Olsen
Visual memory formation begins with the intake and neural processing of discrete samples provided by gaze fixations and saccades. Past research has highlighted a functional relationship between the timing of saccades and oscillations in neural activity over posterior brain areas: saccades phase-lock to alpha…
Marius Schneider, Athanasia Tzanou, Cem Uran, Martin Vinck
Rhythmic flicker stimulation has gained interest as a treatment for neurodegenerative diseases and a method for frequency tagging neural activity in human EEG/MEG recordings. Yet, little is known about the way in which flicker-induced synchronization propagates across cortical levels and impacts different cell types.…
Nicola Agnew, David Lowit, Aidan S. Arnold
In a wide range of quantum technology applications, ranging from atomic clocks to the creation of ultracold samples for atom interferometry, optimal laser sources are critical. In particular, two phase-locked laser sources with a precise difference frequency are needed for efficient coherent population trapping (CPT)…
Mehedi Hasan, Charles Nicholls, Trevor Hall
Delay line oscillators based on photonic components, offer the potential for realization of phase noise levels up to 3 orders of magnitude lower than achievable by conventional microwave sources. Fibreoptic-based delay lines can realize the large delay required for low phase noise systems whilst simultaneously…
Abhijit Banerjee, Trevor James Hall
Complex envelope and reduced phase simulation models describing the dynamical behaviour of an optoelectronic oscillator (OEO) under injection by an external source are described. The models build on the foundations of a previously reported delay integral/differential equation (DDE) theory of injection locking of time…
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…
Takuma Nakamura, Yifan Liu, Naijun Jin, Haotian Cheng + 4 more
'Charles McLemore' 'Nazanin Hoghooghi' 'Peter Rakich' 'Franklyn Quinlan'] We demonstrate thermal-noise-limited direct locking of a semiconductor distributed feedback (DFB) laser to a sub-1 mL volume, ultrastable optical cavity, enabling extremely compact and simple ultrastable laser systems. Using the optoelectronic…
Jose Luis Perez Velazquez, Diego M. Mateos, Richard Wennberg
Derived from previous observations on equal and cross-frequency coupling, we evaluated the proposal that equal and cross-frequency phase synchronization may characterize the integration-segregation perspective of cerebral sensory-motor processing. Using brain recordings obtained in normal conditions and in conditions…
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…
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…
Shi Jia, Qifan Zhang, Tianhao Zhang, Jinlong Yu + 1 more
This letter presents a scheme for obtaining a microwave photonic frequency multiplier with low phase noise, in which an optoelectronic oscillator (OEO) is integrated with a directly modulated laser (DML)-based injection-locking technique. The system achieves frequency multiplication factors of 10 and 20, producing…
Kendall Mehling, Murray Holland, Catie LeDesma
An optical lattice is a periodic light crystal constructed from the standing-wave interference patterns of laser beams. It can be used to store and manipulate quantum degenerate atoms and is an ideal platform for the quantum simulation of many-body physics. A principal feature is that optical lattices are flexible and…
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…
Kari Aaron Clark, Zun Htay, Zichuan Zhou, Amany Kassem + 5 more
6G mobile communications emphasizes emerging user cases including the integration of sensing and communications (ISAC), ultra-precise (cm) positioning, and high-speed radio wireless communications [1]. Precise positioning requires ps-level clock synchronisation between multiple radio units (RU). ISAC requires low noise…
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…