Ramsey Spectroscopy with Displaced Frequency Jumps.

08:00 EDT 22nd March 2019 | BioPortfolio

Summary of "Ramsey Spectroscopy with Displaced Frequency Jumps."

Sophisticated Ramsey-based interrogation protocols using composite laser pulse sequences have been recently proposed to provide next-generation high-precision atomic clocks with a near perfect elimination of frequency shifts induced during the atom-probing field interaction. We propose here a simple alternative approach to the autobalanced Ramsey interrogation protocol and demonstrate its application to a cold-atom microwave clock based on coherent population trapping (CPT). The main originality of the method, based on two consecutive Ramsey sequences with different dark periods, is to sample the central Ramsey fringes with frequency jumps finely adjusted by an additional frequency-displacement concomitant parameter, scaling as the inverse of the dark period. The advantage of this displaced frequency-jump Ramsey method is that the local oscillator (LO) frequency is used as a single physical variable to control both servo loops of the sequence, simplifying its implementation and avoiding noise associated with controlling the LO phase. When tested using a CPT cold-atom clock, the DFJR scheme reduces the sensitivity of the clock frequency to variations of the light shifts by more than an order of magnitude compared with the standard Ramsey interrogation. This simple method can be applied in a wide variety of Ramsey-spectroscopy based applications including frequency metrology with CPT-based and optical atomic clocks, mass spectrometry, and precision spectroscopy.


Journal Details

This article was published in the following journal.

Name: Physical review letters
ISSN: 1079-7114
Pages: 113601


DeepDyve research library

PubMed Articles [7465 Associated PubMed Articles listed on BioPortfolio]

The relationship among resting-state brain activity and connectivity, agreeableness and displaced aggression: Two possible mediation models.

Displaced aggression is a specific form of attack prompted by rumination on anger experiences and revenge thought which might lead to expression of anger on innocent people. There is sufficient eviden...

Realization of a Rydberg-Dressed Ramsey Interferometer and Electrometer.

We present the experimental realization and characterization of a Ramsey interferometer based on optically trapped ultracold potassium atoms, where one state is continuously coupled by an off-resonant...

Frequency of Secondary Dislocations of Initially non Displaced and Minimally Displaced Fractures of the Lateral Humeral Condyle in Children - Surveillance of a Treatment Algorithm.

The treatment of undisplaced fractures of the lateral humeral condyle is conservative. However, it is problematic that it is not possible to differentiate between a stable and an unstable, non-displac...

Broadband Tunable EPR Spectroscopy of Dilute Metal Complexes.

Analysis of the EPR of transition ion complexes requires data taken at different microwave frequencies because the spin hamiltonian contains operators linear in the frequency as well as operators inde...

Patterns of somatic distress among internally displaced persons in Ukraine: analysis of a cross-sectional survey.

There are often high rates of mental disorders in low- and middle-income countries during humanitarian crises, but the prevalence of somatic distress (SD) is underreported in the existing health servi...

Clinical Trials [2562 Associated Clinical Trials listed on BioPortfolio]

Demonstration of Broncholytic Effects in Subjects With Obstructive Airway Diseases by Low Frequency Ultrasound

This study is aiming at evaluating whether low frequency ultrasound spectroscopy is a sensitive tool to detect broncholytic effects in patients with obstructive airway diseases.

Assessment of Extraction of Primary Canines in Treating Mesioangular Displaced Permanent Canines

This research project is important because there is no gold standard to rely on regarding the effect of the extraction of primary canines as an interceptive treatment for children with mes...

Ultrasound Spectroscopy as Indicators of Radiation Treatment Response in Prostate, Rectum and Head & Neck Cancers

Our objective in this study is to identify an optimal ultrasound spectroscopy parameter that can be used as an early predictor of pathological complete or partial response in men with pros...

Cast Immobilization for Non-Displaced Scaphoid Fractures

This trial is trying to understand if immobilization of the thumb after a non-displaced scaphoid fracture affects recovery. The standard of care overseas is a cast that allows for free mo...

Real-time Monitoring of Motor Cortical Activity Induced by Low-frequency Repetitive Transcranial Magnetic Stimulation

In this study, we investigated the effect of low-frequency repetitive trans cranial magnetic stimulation, one of the noninvasive brain stimuli, on the functional changes of the bilateral m...

Medical and Biotech [MESH] Definitions

Spectroscopy technique which measures changes in organic compounds by tracking the spectral energy of absorption of HYDROGEN atoms.

Incomplete rupture of the zonule with the displaced lens remaining behind the pupil. In dislocation, or complete rupture, the lens is displaced forward into the anterior chamber or backward into the vitreous body. When congenital, this condition is known as ECTOPIA LENTIS.

Non-ionizing electromagnetic energy in the frequency range of 100 gigahertz to 10 terahertz which spans from the mid-INFRARED RAYS frequency to the high-frequency edge of the MICROWAVES band.

Ventilatory support system using frequencies from 60-900 cycles/min or more. Three types of systems have been distinguished on the basis of rates, volumes, and the system used. They are high frequency positive-pressure ventilation (HFPPV); HIGH-FREQUENCY JET VENTILATION; (HFJV); and high-frequency oscillation (HFO).

Magnetic resonance spectroscopy involving detection of changes in the resonance of carbon-13 nuclei in organic molecules.

Quick Search

DeepDyve research library

Searches Linking to this Article