Results 31 to 40 of about 37,255 (283)
Recent Progress on Micro-Fabricated Alkali Metal Vapor Cells
Biosensors, 2022 Alkali vapor cells are the core components of atomic sensing instruments such as atomic gyroscopes, atomic magnetometers, atomic clocks, etc. Emerging integrated atomic sensing devices require high-performance miniaturized alkali vapor cells, especially ...
Xuelei Wang +5 more
doaj +1 more source
, 2018 We analyze the prospects of employing a distributed global network of precision measurement devices as a dark matter and exotic physics observatory. In particular, we consider the atomic clocks of the Global Positioning System (GPS), consisting of a ...
Blewitt, G. +3 more
core +1 more source
Remote Sensing, 2022 The quality of satellite clock offset affects the performances of positioning, navigation and timing services, and thus it is essential to the Global Navigation Satellite System (GNSS).
Hu Wang +5 more
doaj +1 more source
An atomic clock with $10^{-18}$ instability
, 2013 Atomic clocks have been transformational in science and technology, leading to innovations such as global positioning, advanced communications, and tests of fundamental constant variation.
Beloy, K. +8 more
core +1 more source
Highly-charged ions as a basis of optical atomic clockwork of exceptional accuracy
, 2012 We propose a novel class of atomic clocks based on highly charged ions. We consider highly-forbidden laser-accessible transitions within the $4f^{12}$ ground-state configurations of highly charged ions.
Derevianko, Andrei +2 more
core +1 more source
A Study on Autonomous Integrity Monitoring of Multiple Atomic Clocks
Measurement Science Review, 2022 A stable and reliable time keeping system depends on the integrity monitoring of the atomic frequency standard. This paper reports a scheme for autonomous integrity monitoring of multiple atomic clocks, which combines the frequency standard comparison ...
Xiao Bo, Liu Ya, Xue Yanrong, Li Xiaohui
doaj +1 more source
Entanglement-enhanced optical atomic clocks
Applied Physics Letters, 2022 Recent developments in atomic physics have enabled the experimental generation of many-body entangled states to boost the performance of quantum sensors beyond the Standard Quantum Limit (SQL). This limit is imposed by the inherent projection noise of a quantum measurement. In this Perspective article, we describe the commonly used experimental methods
Simone Colombo +2 more
openaire +2 more sources
Highly charged ions with E1, M1, and E2 transitions within laser range
, 2012 Level crossings in the ground state of ions occur when the nuclear charge Z and ion charge Z_ion are varied along an isoelectronic sequence until the two outermost shells are nearly degenerate.
A. Ong +4 more
core +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Introduction Neuroblastoma (NB) with central nervous system (CNS) metastases is rare at diagnosis, but occurs more often during relapse/progression. Patients with CNS metastases face a dismal prognosis, with no standardized curative treatment available.
Vicente Santa‐Maria Lopez +13 more
wiley +1 more source
Lattice-induced non-adiabatic frequency shifts in optical lattice clocks
, 2010 We consider the frequency shift in optical lattice clocks which arises from the coupling of the electronic motion to the atomic motion within the lattice.
C. E. Moore, K. Beloy
core +1 more source