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View article: Coherence of Microwave and Optical Qubit Levels in Neutral Thulium
Coherence of Microwave and Optical Qubit Levels in Neutral Thulium Open
Hyperfine-encoded qubits in alkali atoms have established themselves as robust platforms for quantum computing, while alkaline-earth-like elements expand the state manipulation toolbox through their rich spectrum of optical transitions and…
View article: Coherence of Microwave and Optical Qubit Levels in Neutral Thulium
Coherence of Microwave and Optical Qubit Levels in Neutral Thulium Open
Hyperfine-encoded qubits in alkali atoms have established themselves as robust platforms for quantum computing, while alkaline-earth-like elements expand the state manipulation toolbox through their rich spectrum of optical transitions and…
View article: Preparation of an Ensemble of Thulium Atoms in Different Vibrational Levels in an Optical Lattice
Preparation of an Ensemble of Thulium Atoms in Different Vibrational Levels in an Optical Lattice Open
The deterministic excitation of thulium atoms from the ground vibrational state of the optical lattice potential to the first and second vibrational levels with efficiencies of 40 and 24%, respectively, has been demonstrated. The purity of…
View article: Measurement of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>1</mml:mn><mml:msup><mml:mspace width="0.16em"/><mml:mn>3</mml:mn></mml:msup><mml:msub><mml:mi>S</mml:mi><mml:mn>1</mml:mn></mml:msub><mml:mo>→</mml:mo><mml:mn>2</mml:mn><mml:msup><mml:mspace width="0.16em"/><mml:mn>3</mml:mn></mml:msup><mml:msub><mml:mi>S</mml:mi><mml:mn>1</mml:mn></mml:msub></mml:mrow></mml:math> interval in positronium using field ionization of Rydberg states
Measurement of the interval in positronium using field ionization of Rydberg states Open
We report a 40 parts per 109 measurement of the positronium 13S1→23S1 interval using pulsed two-photon optical spectroscopy. The transition is detected via field ionization of atoms excited from the 2S to the 20P Rydberg state. Precise Mon…
View article: Loading of the narrow line Tm MOT from a pulsed cold atomic beam
Loading of the narrow line Tm MOT from a pulsed cold atomic beam Open
We report on building a pulsed source of cold Tm atoms and loading of the narrow-line magnito-optical trap (MOT) from the cold atomic beam. We achieve the loading rate of the first-stage MOT in the primary chamber up to $10^8$ atoms/s and …
View article: Measurement of the $\text{1}^\text{3}\text{S}_\text{1} \to \text{2}^\text{3}\text{S}_\text{1}$ interval in positronium using field-ionization of Rydberg states
Measurement of the $\text{1}^\text{3}\text{S}_\text{1} \to \text{2}^\text{3}\text{S}_\text{1}$ interval in positronium using field-ionization of Rydberg states Open
We report a new 40 ppb measurement of the positronium $\text{1}^\text{3}\text{S}_\text{1} \to \text{2}^\text{3}\text{S}_\text{1}$ interval using pulsed two-photon optical spectroscopy. The transition is detected via field-ionization of ato…
View article: Combined microwave and optical spectroscopy for hyperfine structure analysis in thulium atoms
Combined microwave and optical spectroscopy for hyperfine structure analysis in thulium atoms Open
The hyperfine structure of atoms and ions is widely used in fundamental and applied research. Accurate knowledge of hyperfine splitting values is essential for quantum metrology applications as well as for improving the performance of syst…
View article: Laser cooling of thulium atoms to ground vibrational state in an optical lattice
Laser cooling of thulium atoms to ground vibrational state in an optical lattice Open
View article: Synchronous Comparison of Two Thulium Optical Clocks
Synchronous Comparison of Two Thulium Optical Clocks Open
The experimental comparison of two thulium optical lattice clocks in a time interval of up to one hour has been carried out. The synchronous comparison of a clock transition in two independent atomic ensembles using a single ultrastable la…
View article: Compensation of the multipolar polarizability shift in optical lattice clocks
Compensation of the multipolar polarizability shift in optical lattice clocks Open
In neutral atom optical clocks, the higher-order atomic polarizability terms lead to the clock transition frequency shift which is motion-state dependent and nonlinear with the optical lattice depth. We propose to use an auxiliary optical …
View article: Antihydrogen and Hydrogen: Search for the Difference
Antihydrogen and Hydrogen: Search for the Difference Open
Our universe consists mainly of regular matter, while the amount of antimatter seems to be negligible. The origin of this difference, known as the baryon asymmetry, remains undiscovered. Since the discovery of antimatter, many experiments …
View article: Pulsed CW laser for long-term spectroscopic measurements at high power in deep-UV
Pulsed CW laser for long-term spectroscopic measurements at high power in deep-UV Open
We present a novel technique for in-vacuum cavity-enhanced UV spectroscopy that allows nearly continuous measurements over several days, minimizing mirror degradation caused by high-power UV radiation. Our method relies on pulsing of the c…
View article: Pulsed CW laser for long-term spectroscopic measurements at high power in deep-UV
Pulsed CW laser for long-term spectroscopic measurements at high power in deep-UV Open
We present a novel technique for in-vacuum cavity-enhanced UV spectroscopy that allows nearly continuous measurements over several days, minimizing mirror degradation caused by high-power UV radiation. Our method relies on pulsing of the c…
View article: Update of Muonium 1S–2S transition frequency
Update of Muonium 1S–2S transition frequency Open
View article: Deep Laser Cooling of Thulium Atoms to Sub-µK Temperatures in Magneto-Optical Trap
Deep Laser Cooling of Thulium Atoms to Sub-µK Temperatures in Magneto-Optical Trap Open
Deep laser cooling of atoms, ions, and molecules facilitates the study of fundamental physics as well as applied research. In this work, we report on the narrow-line laser cooling of thulium atoms at the wavelength of 506.2nm with the natu…
View article: Update of Muonium 1S-2S transition frequency
Update of Muonium 1S-2S transition frequency Open
We present an updated value of the Muonium 1S-2S transition frequency, highlighting contributions from different QED corrections as well as the large uncertainty in the Dirac contribution, stemming from the uncertainty of the electron-to-m…
View article: Measurement of the transition frequency from 2S1/2, F = 0 to 2P1/2, F = 1 states in Muonium
Measurement of the transition frequency from 2S1/2, F = 0 to 2P1/2, F = 1 states in Muonium Open
Muons are puzzling physicists since their discovery when they were first thought to be the meson predicted by Yukawa to mediate the strong force. The recent results at Fermilab on the muon g-2 anomaly puts the muonic sector once more under…
View article: Measurement of the transition frequency from 2S1/2, F = 0 to 2P1/2, F = 1 states in Muonium
Measurement of the transition frequency from 2S1/2, F = 0 to 2P1/2, F = 1 states in Muonium Open
View article: Measurement of the 2S1/2,F=0 → 2P1/2,F=1 transition in Muonium
Measurement of the 2S1/2,F=0 → 2P1/2,F=1 transition in Muonium Open
Here we present the results of the first measurement of the 2S1/2, F=0 -> 2P1/2, F=1 transition in Muonium, the hydrogen-like bound state of a positive muon and an electron. The measured value of 580.6+-6.8 MHz is in agreement with the the…
View article: A large octupole magnetic trap for research with atomic hydrogen
A large octupole magnetic trap for research with atomic hydrogen Open
We describe the design and performance of a large magnetic trap for storage and cooling of atomic hydrogen (H). The trap operates in the vacuum space of a dilution refrigerator at a temperature of 1.5 K. Aiming at a large volume of the tra…
View article: Precision Measurement of the Lamb Shift in Muonium
Precision Measurement of the Lamb Shift in Muonium Open
We report a new measurement of the $n=2$ Lamb shift in Muonium using microwave spectroscopy. Our result of $1047.2(2.3)_\textrm{stat}(1.1)_\textrm{syst}$ MHz comprises an order of magnitude improvement upon the previous best measurement. T…
View article: Compact magneto-optical trap of thulium atoms for a transportable optical clock
Compact magneto-optical trap of thulium atoms for a transportable optical clock Open
We have developed a compact vacuum system for laser cooling and spectroscopy of neutral thulium atoms. Compactness is achieved by obviating a classical Zeeman slower section and placing an atomic oven close to a magneto-optical trap (MOT),…
View article: Simultaneous bicolor interrogation in thulium optical clock providing very low systematic frequency shifts
Simultaneous bicolor interrogation in thulium optical clock providing very low systematic frequency shifts Open
View article: Efficient loading of thulium atoms in a compact MOT for a transportable optical clock
Efficient loading of thulium atoms in a compact MOT for a transportable optical clock Open
We report on building of a compact vacuum chamber for spectroscopy of ultracold thulium and trapping of up to 13 million atoms. Compactness is achieved by obviating a classical Zeeman slower section and placing an atomic oven close to a ma…
View article: Extraordinary low systematic frequency shifts in bi-colour thulium optical clock
Extraordinary low systematic frequency shifts in bi-colour thulium optical clock Open
Optical atomic clocks have already overcome the eighteenth decimal digit of instability and uncertainty demonstrating incredible control over external perturbations of the clock transition frequency. At the same time there is an increasing…
View article: Data File 3.csv
Data File 3.csv Open
Data File 3 contains data presented in Fig 4.
View article: Data File 4.csv
Data File 4.csv Open
Data File 4 contains data presented in Fig 5.
View article: Data File 2.csv
Data File 2.csv Open
Data File 2 contains data presented in Fig 3.
View article: Data File 1.csv
Data File 1.csv Open
Data File 1 contains data presented in Fig 2.
View article: Simultaneous preparation of two initial clock states in a thulium optical clock
Simultaneous preparation of two initial clock states in a thulium optical clock Open
Due to the low sensitivity of the thulium optical clock to black-body\nradiation and good accuracy and stability estimations, it appears to be one of\nthe most promising transportable optical clocks. One of the leading systematic\neffects …