We have constructed an optical clock with a fractional frequency inaccuracy of 8.6x10{-18}, based on quantum logic spectroscopy of an Al+ ion. A simultaneously trapped Mg+ ion serves to sympathetically laser cool the Al+ ion and detect its quantum state. The frequency of the {1}S{0}<-->{3}P{0} clock transition is compared to that of a previously constructed Al+ optical clock with a statistical measurement uncertainty of 7.0x10{-18}. The two clocks exhibit a relative stability of 2.8x10{-15}tau{-1/2}, and a fractional frequency difference of -1.8x10{-17}, consistent with the accuracy limit of the older clock.

Download full-text PDF

Source
http://dx.doi.org/10.1103/PhysRevLett.104.070802DOI Listing

Publication Analysis

Top Keywords

al+ optical
8
optical clock
8
fractional frequency
8
al+ ion
8
frequency
4
frequency comparison
4
comparison high-accuracy
4
al+
4
high-accuracy al+
4
optical clocks
4

Similar Publications

Laser surface alloying of Fe, Si, and C on aluminium is demonstrated using a Q-switched Nd:YAG laser as the source of energy. The fundamental wavelength of the laser beam was 1064 nm with an output energy of 100 mJ and a pulse duration of 10 ns. The exposure was conducted in repetitive mode with a frequency rate of 1 Hz.

View Article and Find Full Text PDF

Adverse reactions caused by waterborne contaminants constitute a major hazard to the environment. Controlling the pollutants released into aquatic systems through water degradation has been one of the major concerns of recent research. Bismuth-based perovskites have exhibited outstanding properties in the field of photocatalysis.

View Article and Find Full Text PDF

Purpose: We analyzed intraocular lens (IOL) power calculation in a series of patients with a zero diopter power implant. The idea was to bypass the Estimated Lens Plane (ELP), an important variable in normal IOL calculation.

Setting: Large multi-center group practice.

View Article and Find Full Text PDF

This paper presents an all-optical 4 × 2 encoder based on graphene-plasmonic waveguides for operation in the wavelength range of 8-12 μm. The basic plasmonic waveguide consists of a silicon (Si) strip and a graphene sheet supported by two dielectric ridges. Surface plasmon polaritons (SPPs) are stimulated in the spatial gap between the graphene sheet and the Si strip.

View Article and Find Full Text PDF

Toxicological profile of Acovenoside A as an active pharmaceutical ingredient - prediction of missing key toxicological endpoints using in silico toxicology methodology.

Chem Biol Interact

January 2025

Safety Assessment, Syngene International Limited, Biocon Park, Bommasandra IV Phase, Jigani Link Road, Bangalore, 560099, Karnataka, India.

Acovenoside A, a cardenolide glycoside from Acokanthera oppositifolia, demonstrates significant therapeutic potential in cardioprotection and oncology, particularly against non-small cell lung cancer (NSCLC). However, its toxicological profile requires thorough evaluation for safe pharmaceutical application. For this purpose a comprehensive in silico methods were applied, including ACD/Labs Percepta, STopTox, admetSAR 3.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!