An atomic clock with $10^{-18}$ instability

Abstract

Atomic clocks have been transformational in science and technology, leading to innovations such as global positioning, advanced communications, and tests of fundamental constant variation. Next-generation optical atomic clocks can extend the capability of these timekeepers, where researchers have long aspired toward measurement precision at 1 part in $10^{18}$. This milestone will enable a second revolution of new timing applications such as relativistic geodesy, enhanced Earth- and space-based navigation and telescopy, and new tests on physics beyond the Standard Model. Here, we describe the development and operation of two optical lattice clocks, both utilizing spin-polarized, ultracold atomic ytterbium. A measurement comparing these systems demonstrates an unprecedented atomic clock instability of $1.6\times 10^{-18}$ after only $7$ hours of averaging.

References in corpus (13)

• Frequency Comparison of Two High-Accuracy Al+ Optical Clocks
• A sub-40 mHz linewidth laser based on a silicon single-crystal optical cavity
• Implementation of Cavity Squeezing of a Collective Atomic Spin
• Making optical atomic clocks more stable with $10^{-16}$ level laser stabilization
• Quantum State Engineering and Precision Metrology using State-Insensitive Light Traps
• New Limits on Coupling of Fundamental Constants to Gravity Using ${}^{87}$Sr Optical Lattice Clocks
• Progress in Atomic Fountains at LNE-SYRTE
• Experimenting an optical second with strontium lattice clocks
• Comparison of Two Independent Sr Optical Clocks with 1e-17 Stability at 10^3 s
• High accuracy measure of atomic polarizability in an optical lattice clock
• The Constancy of the Constants of Nature: Updates
• p-Wave cold collisions in an optical lattice clock
• Minimizing the Dick Effect in an Optical Lattice Clock

Cited by in corpus (304)

• Quantum sensing
• Quantum metrology with nonclassical states of atomic ensembles
• An Optical Lattice Clock with Accuracy and Stability at the $10^{-18}$ Level
• Systematic evaluation of an atomic clock at 2e-18 total uncertainty
• A quantum network of clocks
• Hunting for topological dark matter with atomic clocks
• Frequency ratio of two optical clock transitions in ${}^{171}$Yb${}^{+}$ and constraints on the time-variation of fundamental constants
• A clock network for geodesy and fundamental science
• Searching for dilaton dark matter with atomic clocks
• Gravitational wave detection with optical lattice atomic clocks
• Ultra-stable optical clock with two cold-atom ensembles
• A Fermi-degenerate three-dimensional optical lattice clock
• Observation of two-orbital spin-exchange interactions with ultracold SU(N)-symmetric fermions
• Ultracold Fermi Gases with Emergent SU(N) Symmetry
• Spin-orbit coupled fermions in an optical lattice clock
• 8E-17 fractional laser frequency instability with a long room-temperature cavity
• Atomic Clocks for Geodesy
• Search for ultralight scalar dark matter with atomic spectroscopy
• Searching for dark matter and variation of fundamental constants with laser and maser interferometry
• A transportable optical lattice clock with $7\times 10^{-17}$ uncertainty
• Frequency ratio of Yb and Sr clocks with $5\times 10^{-17}$ uncertainty at 150 s averaging time
• Matter-wave Atomic Gradiometer Interferometric Sensor (MAGIS-100)
• Reduced back-action for phase sensitivity 10 times beyond the standard quantum limit
• Search for light scalar dark matter with atomic gravitational wave detectors
• A strontium lattice clock with $3\times 10^{-17}$ inaccuracy and its frequency
• Compact Optical Atomic Clock Based on a Two-Photon Transition in Rubidium
• Synchronization of Distant Optical Clocks at the Femtosecond Level
• First observation with global network of optical atomic clocks aimed for a dark matter detection
• Quantum Fisher information for states in exponential form
• High precision differential clock comparisons with a multiplexed optical lattice clock
• Spin squeezing in a Rydberg lattice clock
• Low-loss integrated photonics for the blue and ultraviolet regime
• Realization of a time-scale with an accurate optical lattice clock
• An atomic clock with $1\times 10^{-18}$ room-temperature blackbody Stark uncertainty
• Autonomous quantum clocks: does thermodynamics limit our ability to measure time?
• An ultrastable silicon cavity in a continuously operating closed-cycle cryostat at 4 K
• Synthetic spin-orbit coupling in an optical lattice clock
• Testing the universality of free fall with rubidium and ytterbium in a very large baseline atom interferometer
• Highly-charged ions for atomic clocks, quantum information, and search for $\alpha$-variation
• One decade of quantum optimal control in the chopped random basis
• Diamond magnetometry and gradiometry towards subpicotesla DC field measurement
• The Feasibility of a Fully Miniaturized Magneto-Optical Trap for Portable Ultracold Quantum Technology
• Precise study of asymptotic physics with subradiant ultracold molecules
• A transportable strontium optical lattice clock
• Brillouin amplification supports $1\times 10^{-20}$ accuracy in optical frequency transfer over 1400~km of underground fibre
• Frequency measurements of superradiance from the strontium clock transition
• Bayesian quantum frequency estimation in presence of collective dephasing
• Quantum limits on post-selected, probabilistic quantum metrology
• Hyperpolarizability and operational magic wavelength in an optical lattice clock
• A Cold-Strontium Laser in the Superradiant Crossover Regime
• Optical to microwave clock frequency ratios with a nearly continuous strontium optical lattice clock
• Quantum correlations and entanglement in far-from-equilibrium spin systems
• Proposal of room-temperature diamond maser
• Noise and instability of an optical lattice clock
• Superfluidity and Superconductivity in Neutron Stars
• Frequency ratios of Sr, Yb and Hg based optical lattice clocks and their applications
• Counting the Cycles of Light using a Self-Referenced Optical Microresonator
• Review: Quantum Metrology and Sensing with Many-Body Systems
• Additional clock transitions in neutral ytterbium bring new possibilities for testing physics beyond the Standard Model
• Ultra-stable laser with average fractional frequency drift rate below $5\times 10^{-19}/\mathrm{s}$
• Searches for topological defect dark matter via non-gravitational signatures
• Cavity-aided non-demolition measurements for atom counting and spin squeezing
• Large-momentum-transfer Bragg interferometer with strontium atoms
• Eavesdropping time and frequency: phase noise cancellation along a time-varying path, such as an optical fiber
• A Cs-Based Optical Frequency Measurement Using Cross-Linked Optical and Microwave Oscillators
• Magnetic-dipole transitions in highly-charged ions as a basis of ultra-precise optical clocks
• On the relation between uncertainties of weighted frequency averages and the various types of Allan deviations
• Ultra-stable Free-Space Laser Links for a Global Network of Optical Atomic Clocks
• Loss in long-storage-time optical cavities
• A small weak scale from a small cosmological constant
• Determination of a high spatial resolution geopotential model using atomic clock comparisons
• Study of highly-charged Ag-like and In-like ions for the development of atomic clocks and search for $\alpha$-variation
• Demonstration of quantum synchronization based on second-order quantum coherence of entangled photons
• Beyond 100 THz-spanning ultraviolet frequency combs in a non-centrosymmetric crystalline waveguide
• Prospects for atomic clocks based on large ion crystals
• Probing many-body interactions in an optical lattice clock
• Towards a Mg lattice clock: Observation of the ${}^1{S}_0-$${}^3{P}_0$ transition and determination of the magic wavelength
• Exploring the Kondo model in and out of equilibrium with alkaline-earth atoms
• Absolute measurement of the ${}^1{S}_0$ - ${}^3{P}_0$ clock transition in neutral ${}^{88}$Sr over the 330 km-long stabilized fibre optic link
• Dynamics of correlations in two-dimensional quantum spin models with long-range interactions: A phase-space Monte-Carlo study
• Laser cooling in a chip-scale platform
• Absolute frequency measurement of the 1S0 - 3P0 transition of 171Yb
• Enhancing parameter precision of optimal quantum estimation by direct quantum feedback
• Active Faraday optical frequency standards
• Laser frequency stabilization based on steady-state spectral-hole burning in Eu${}^{3+}$:Y${}_2$SiO${}_5$
• Atomic clocks as a tool to monitor vertical surface motion
• Stability of a trapped atom clock on a chip
• Kondo Effect in Alkali-Earth Atomic Gases with Confinement-induced Resonance
• Progress and perspectives on composite laser-pulses spectroscopy for high-accuracy optical clocks
• Collective Spin-Light and Light-Mediated Spin-Spin Interactions in an Optical Cavity
• Single-beam Zeeman slower and magneto-optical trap using a nanofabricated grating
• Search for the effect of massive bodies on atomic spectra and constraints on Yukawa-type interactions of scalar particles
• Frequency comb up- and down-conversion in a synchronously-driven ${\chi }^{(2)}$ optical microresonator
• Direct comparison of optical lattice clocks with an intercontinental baseline of 9 000 km
• Optical-Clock-Based Time Scale
• Atomic fountains and optical clocks at SYRTE: status and perspectives
• Evaluation of Long Term Performance of Continuously Running Atomic Fountains
• Conditional Ramsey Spectroscopy with Synchronized Atoms
• Fibre-optic delivery of time and frequency to VLBI station
• A strontium optical lattice clock with $1\times 10^{-17}$ uncertainty and measurement of its absolute frequency
• The unit of time: present and future directions
• Optical clock sensitive to variation of the fine structure constant based on the Ho${}^{14+}$ ion
• Optical frequency divider with division uncertainty at the 10^(-21) level
• Frequency ratio measurement of 171Yb and 87Sr optical lattice clocks
• Inner-shell magnetic dipole transition in Tm atom as a candidate for optical lattice clocks
• Dicke superradiance in ordered arrays of multilevel atoms
• Modified hyper-Ramsey methods for the elimination of probe shifts in optical clocks
• Vacuum spin squeezing
• Optical frequency transfer via a 660 km underground fiber link using a remote Brillouin amplifier
• Measurement of magic wavelengths for the 40Ca+ clock transition
• Phase locking a clock oscillator to a coherent atomic ensemble
• Probing beyond the laser coherence time in optical clock comparisons
• A microrod-resonator Brillouin laser with 240 Hz absolute linewidth
• Confinement of an alkaline-earth element in a grating magneto-optical trap
• Optical Atomic Clock aboard an Earth-orbiting Space Station (OACESS): Enhancing searches for physics beyond the standard model in space
• Quantum network of neutral atom clocks
• Atomic properties of Cd-like and Sn-like ions for the development of frequency standards and search for the variation of the fine-structure constant
• Core-Shell Magneto-Optical Trap for Alkaline-Earth-Metal-Like Atoms
• Relativistic Corrections for Time and Frequency Transfer in Optical Fibres
• Thermometry via Light Shifts in Optical Lattices
• Generation of very high-order high purity Gaussian modes via spatial light modulation
• Reservoir spectroscopy of 5s5p ${}^3$P${}_2$ - 5s$n$d ${}^3$D${}_{1,2,3}$ transitions in strontium
• Magnetically-Induced Optical Transparency on a Forbidden Transition in Strontium for Cavity-Enhanced Spectroscopy
• Least-squares analysis of clock frequency comparison data to deduce optimized frequency and frequency ratio values
• Measuring absolute frequencies beyond the GPS limit via long-haul optical frequency dissemination
• Strong Coupling on a Forbidden Transition in Strontium and Nondestructive Atom Counting
• Polarizabilities of the 87Sr Clock Transition
• Efficient Frequency Doubling at 399 nm
• High-precision spectroscopy of ultracold molecules in an optical lattice
• Entanglement-Enhanced Optical Atomic Clocks
• Electron and recoil ion momentum imaging with a magneto-optically trapped target
• Spin squeezing and many-body dipolar dynamics in optical lattice clocks
• Non-linear Spectroscopy of Sr Atoms in an Optical Cavity for Laser Stabilization
• Generalized Hyper-Ramsey Resonance with separated oscillating fields
• Visible blue-to-red 10 GHz frequency comb via on-chip triple-sum frequency generation
• Entanglement and spin-squeezing in a network of distant optical lattice clocks
• Influence of relativistic effects on satellite-based clock synchronization
• Atomic Properties of Lu${}^{+}$
• Quantum Algorithmic Readout in Multi-Ion Clocks
• Observation of Motion Dependent Nonlinear Dispersion with Narrow Linewidth Atoms in an Optical Cavity
• Direct loading of a large Yb MOT on the ${}^1{S}_0\to {}^3{P}_1$ transition
• Strontium optical lattice clocks for practical realization of the metre and secondary representation of the second
• Magnetic Field-controlled Transmission and Ultra-narrow Superradiant Lasing by Dark Atom-light Dressed States
• High-Sensitive Microwave Electrometry with Enhanced Instantaneous Bandwidth
• Measurement of the Yb I ${}^1{S}_0{-}^1{P}_1$ transition frequency at 399 nm using an optical frequency comb
• Continuous real-time tracking of a quantum phase below the standard quantum limit
• Optical Atomic Clock Comparison through Turbulent Air
• Fast and scalable quantum information processing with two-electron atoms in optical tweezer arrays
• Efficient and tunable blue light generation using lithium niobate nonlinear photonics
• Absolute frequency measurements and hyperfine structures of the molecular iodine transitions at 578 nm
• Absolute and relative stability of an optical frequency reference based on spectral hole burning in Eu${}^{3+}$:Y${}_2$SiO${}_5$
• Linear response theory for superradiant lasers
• Optical atomic clocks with suppressed black body radiation shift
• Effect of soil temperature on one-way optical frequency transfer through dense-wavelength-division-multiplexing fibre links
• Quantum estimation of magnetic-field gradient using W-state
• Uncertainty evaluation of an ${}^{171}$Yb optical lattice clock at NMIJ
• Space-Time Reference with an Optical Link
• The quantum Allan variance
• Second harmonic generation at 399 nm resonant on the ${}^1{S}_0{-}^1{P}_1$ transition of ytterbium using a periodically poled LiNbO${}_3$ waveguide
• Dynamics of bad-cavity enhanced interaction with cold Sr atoms for laser stabilization
• High-efficiency cold-atom transport into a waveguide trap
• Synthetic Frequency Protocol in the Ramsey Spectroscopy of Clock Transitions
• Progress on accurate measurement of the Planck constant: watt balance and counting atoms
• Highly charged ions for atomic clocks and search for variation of the fine structure constant
• Beyond the fundamental noise limit in coherent optical fiber links
• A microrod optical-frequency reference in the ambient environment
• A High-Mechanical Bandwidth Fabry-Perot Fiber Cavity
• An on-chip optical lattice for cold atom experiments
• Spacecraft Clocks and Relativity: Prospects for Future Satellite Missions
• Injection locking of a high power ultraviolet laser diode for laser cooling of ytterbium atoms
• Two-Color Magneto-Optical Trap with Small Magnetic Field for Ytterbium
• Adiabatic Control of Atomic Dressed States for Transport and Sensing
• Time keeping and searching for new physics using metastable states of Cu, Ag and Au
• Quantum clocks and their synchronisation - the Alternate Ticks Game
• Scalar Static Polarizabilities of Lanthanides and Actinides
• Spatially Homogeneous Entanglement for Matter-Wave Interferometry Created with Time-Averaged Measurements
• Crossed-Beam slowing to enhance narrow-line Ytterbium Magneto-Optic Traps
• Active Stabilization of a Diode Laser Injection Lock
• Generation of high-purity, low-temperature samples of ${}^{39}$K for applications in metrology
• Detecting gravitational decoherence with clocks: Limits on temporal resolution from a classical channel model of gravity
• New Atomic probes for Dark Matter detection: Axions, Axion-like particles and Topological Defects
• Grating magneto-optical traps with complicated level structures
• Photovoltaic Effect of Atomtronics Induced by Artificial Gauge Field
• Quantum engineering of atomic phase-shifts in optical clocks
• Quantum time dilation in atomic spectra
• Compact Yb${}^{+}$ optical atomic clock project: design principle and current status
• A self-locking Rydberg atom electric field sensor
• An approach to directly probe simultaneity
• Quantum treatment of two-stage sub-Doppler laser cooling of magnesium atoms
• 946-nm Nd:YAG digital-locked laser at $1.1\times 10^{-16}$ in 1 s and transfer-locked to a cryogenic silicon cavity
• Spin-squeezed atomic crystal
• Broadband, unpolarized repumping and clearout light sources for Sr${}^{+}$ single-ion clocks
• Atomic Quantum Technologies for Quantum Matter and Fundamental Physics Applications
• Temporal solitons in a coherently driven active resonator
• Suppression of clock shifts at field-insensitive transitions
• Effective many-body parameters for atoms in non-separable Gaussian optical potentials
• Quantum-assisted Distortion-free audio signal sensing
• Multiparameter estimation via an ensemble of spinor atoms
• Frequency spectrum of an optical resonator in a curved spacetime
• Testing the quantum superposition principle in the frequency domain
• A 3-photon process for producing a degenerate gas of metastable alkaline-earth atoms
• Sympathetic cooling of ${}^{40}{\text{Ca}}^{+}$ - ${}^{27}{\text{Al}}^{+}$ ion pair crystal in a linear Paul trap
• Relativistic tidal effects on clock-comparison experiments
• Cancellation of Collisional Frequency Shifts in Optical Lattice Clocks with Rabi Spectroscopy
• A compact ultranarrow high-power laser system for experiments with 578nm Ytterbium clock transition
• Improving Short-Term Stability in Optical Lattice Clocks by Quantum Nondemolition Measurements
• High Efficiency Raman Memory by Suppressing Radiation Trapping
• Observation of the ${}^1$S${}_0$ to ${}^3$D${}_1$ clock transition in ${}^{175}$Lu${}^{+}$
• State-dependent potentials for the ${}^1{\text{S}}_0$ and ${}^3{\text{P}}_0$ clock states of neutral ytterbium atoms
• Finite field calculations of static polarizabilities and hyperpolarizabilities of In${}^{+}$ and Sr
• Cold atoms: A field enabled by light
• Precision measurements with cold atoms and trapped ions
• Sub-Doppler cooling of ytterbium with the ${}^1{S}_0$-${}^1{P}_1$ transition including ${}^{171}$Yb (I=1/2)
• A long-term frequency-stabilized erbium-fiber-laser-based optical frequency comb with an intra-cavity electro-optic modulator
• The best Fisher is upstream: data processing inequalities for quantum metrology
• Inverted crossover resonance aiding laser cooling of ${}^{171}$Yb
• Retrieval of cavity-generated atomic spin-squeezing after free-space release
• Likelihood-free methods for quantum parameter estimation
• Theory and Application of Cavity Solitons in Photonic Devices
• Interferometry in an Atomic Fountain with Ytterbium Bose-Einstein Condensates
• Artificial magnetic field induced by an evanescent wave
• Enhancing strontium clock atom interferometry using quantum optimal control
• Test of Einstein Equivalence Principle by frequency comparisons of optical clocks
• The effects of different quantum feedback operator types on the parameter precision of detection efficiency in optimal quantum estimation
• Digital Doppler-cancellation servo for ultra-stable optical frequency dissemination over fiber
• Gravitational Effects in g Factor Measurements and High-Precision Spectroscopy: Limits of Einstein's Equivalence Principle
• Magic Wavelength for Hydrogen 1S-2S Transition
• Preliminary Sensitivity Study for a Gravitational Redshift Measurement with China's Lunar Exploration Project
• Influence of cosmological expansion in local experiments
• Clock and inter-combination line frequency separation in ${}^{171}$Yb
• Direct laser cooling Al+ ions optical clocks
• Dual-colour magic-wavelength trap for suppression of light shifts in atoms
• Enhanced Magnetic Trap Loading for Atomic Strontium
• Violation of the equivalence principle induced by oscillating rest mass and transition frequency, and its detection in atom interferometers
• Angle-dependent magic wavelengths for the $4s_{1/2}\to 3d_{5/2,3/2}$ transitions of Ca${}^{+}$ ions
• Distinguishing between evidence and its explanations in the steering of atomic clocks
• Programmable System on Chip for controlling an atomic physics experiment
• Magic wavelengths for the $6s^2{}^1{S}_0-6s6p{}^3{P}_1^o$ transition in ytterbium atom
• Magic Wavelengths of the Yb $6s^2{}^1{S}_0-6s6p{}^3{P}_1$ Intercombination Transition
• Ultimate limit on time signal generation
• Spectroscopy and laser cooling on the ${}^1{S}_0-{}^3{P}_1$ line in Yb via an injection-locked diode laser at 1111.6nm
• Magnetically Induced Optical Transparency With Ultra-Narrow Spectrum
• Composite pulses in Hyper-Ramsey spectroscopy for the next generation of atomic clocks
• Quantum and classical effects in a light-clock falling in Schwarzschild geometry
• Realization of a fast triple-magic all-optical qutrit in strontium-88
• A practical guide to feedback control for Pound-Drever-Hall laser linewidth narrowing
• Active control of a diode laser with injection locking
• Space-based optical lattice clocks as gravitational wave detectors in search for new physics
• Determination of hyperfine splittings and Landé $g_J$ factors of $5s{}^2{S}_{1/2}$ and $5p{}^2{P}_{1/2,3/2}$ states of ${}^{111,113}$Cd${}^{+}$ for a microwave frequency standard
• Performance of stochastic clocks in the Alternate Ticks Game
• CIRCUS: an autonomous control system for antimatter, atomic and quantum physics experiments
• Beyond the Spin Model Approximation for Ramsey Spectroscopy
• Atomic clock interferometry using optical tweezers
• An inverted crossover resonance within one Zeeman manifold
• Integrative biological simulation praxis: Considerations from physics, philosophy, and data/model curation practices
• STE-QUEST Mission and System Design - Overview after completion of Phase-A
• Imaging the transverse spin density of light via electromagnetically induced transparency
• Gravitational lens time-delay as a probe of a possible time variation of the fine-structure constant
• Reducing Collective Quantum State Rotation Errors with Reversible Dephasing
• Fully Collective Superradiant Lasing with Vanishing Sensitivity to Cavity Length Vibrations
• Cooling of an Integrated Brillouin Laser below the Thermal Limit
• Invertible condition of quantum Fisher information matrix for a mixed qubit
• Rabi spectroscopy of three-dimensional optical lattice clocks
• Trade-off between Linewidth and Slip Rate in a Mode-Locked Laser Model
• Analytically exploiting noise correlations inside the feedback loop to improve locked-oscillator performance
• Square Kilometer Array Telescope - Precision Reference Frequency Synchronisation via 1f-2f Dissemination
• Two-color Ytterbium MOT in a compact dual-chamber setup
• Critically Evaluated Energy Levels, Wavelengths, Transition Probabilities, and Intensities of Six-Times Ionized Cesium: Cs VII
• Accurate determination of energy levels, hyperfine structure constants, lifetimes and dipole polarizabilities of triply ionized tin isotopes
• Enhancing precision of damping rate by PT symmetric Hamiltonian
• Entanglement-enhanced Synchronous differential comparison
• Demonstration of Real-Time Precision Optical Time Synchronization in a True Three-Node Architecture
• Quantum Limit on Stability of Clocks in a Gravitational Field
• A microresonator frequency comb optical clock
• Clock frequency estimation under spontaneous emission
• Fiber-based ultra-stable frequency synchronization using client-side, 1f-2f active compensation method
• Quantum Sensing Using Atomic Clocks for Nuclear and Particle Physics
• Measuring the re-absorption cross section of a Magneto-Optical Trap
• Quantum estimation of detection efficiency with no-knowledge quantum feedback
• Ensemble master equation for a trapped-atom clock with one- and two-body losses
• Constraint on the internal structure of a neutron star from Vela pulsar glitches
• A hybrid solution for simultaneous transfer of ultrastable optical frequency, RF frequency and UTC time-tags over optical fiber
• Fourier transform detection of weak optical transitions with cyclic routines
• Optical clock based on two-photon spectroscopy of the nuclear transition in ion ${}^{229}$Th in a monochromatic field
• Collinear Three-Photon Excitation of a Strongly Forbidden Optical Clock Transition
• Optimizing the optical imaging system by \emph{in-situ} imaging the plugged hole in the ultracold atoms
• Ultralong Faraday laser as an optical frequency standard
• Optical Frequency Averaging of Light
• Ultracold atom interferometry with pulses of variable duration
• High-precision Time-Frequency Signal Simultaneous Transfer System via a WDM-based Fiber Link
• Absolute frequency measurements on the $5s5p^3$P${}_0\to 5s6d^3$D${}_1$ transition in strontium
• Frequency Stability of Graphene Nonlinear Parametric Oscillator
• A Brillouin Laser Optical Atomic Clock
• Decoherence of Atomic Ensembles in Optical Lattice Clocks by Gravity
• Cavity locking with spatial modulation of optical phase front for laser stabilization
• Transit Noise in Spin Squeezing Experiments with Coated Rubidium Vapor Cell
• Observation of the electric Breit-Rabi Effect
• Avoiding Aliasing in Allan Variance: an Application to Fiber Link Data Analysis
• Topological Switching via Exceptional Point Pairs in an Optical Microcavity Laser
• Oscillator metrology with software defined radio
• Ultra-narrow linewidth self-adaptive photonic oscillator : principle and realization
• Enhanced trapping of colding lithium by using the multiple-sideband cooling in a two-dimensional magneto-optical trap
• Preliminary experimental results of determining the geopotential difference between two synchronized portable hydrogen clocks at different locations
• Incorporating an Optical Clock into a Time Scale