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Article
Open AccessModel of Coupled Quantum Memristors Based on a Single Trapped 171Yb+ Ion
A method for the joint application of two coupled quantum memristors on a single 171Yb+ ion by using optical and radio-frequency transitions induced by resonant laser fields is proposed. As a result, coherent map...
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Article
Mirror Deformation and Zero Thermal Expansion Temperature Shift in Optical Cavity due to Radiative Heating
A detailed study of the effects resulting in fluctuations and shifts of eigenfrequencies of optical cavities is necessary for their application in optical frequency, time, and length standards, experiments on ...
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Article
Thermo-Optical Bistability in a Compact High-Q Cavity at a Wavelength of 1550 nm
The bistability effect caused by radiation absorption in mirrors of a compact high-Q cavity at a wavelength of 1550 nm is studied. The effect leads to a hysteresis of the cavity transmission when scanning the ...
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Article
Active Pointing System for the Transmission of Ultrastable Optical Frequency Signals through an Open-Air Link
An active pointing system has been developed and created for an atmospheric transfer link for ultrastable optical frequency signals. This system can significantly decrease the deviations of laser beam directio...
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Article
Open AccessErratum to: Several Articles in JETP Letters
An Erratum to this paper has been published: https://doi.org/10.1134/S0021364022390023
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Article
Open AccessDetermination of the Heating Rate and Temperature of an Ion Chain in a Linear Paul Trap by the Dephasing of Rabi Oscillations
The optimization of the parameters of laser cooling and the investigation of the heating rate in ion traps require the measurement of the temperature of ion chains for which the Lamb–Dicke regime is satisfied....
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Article
Optimization of the Readout Fidelity of the Quantum State of an Optical Qubit in the 171Yb+ Ion
A scheme based on a laser cooling system has been proposed to detect the state of an optical qubit in the 171Yb+ ion. Analytical expressions have been derived for the readout fidelity including the dark photon co...
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Article
Compact High-Finesse ULE Cavities for Laser Frequency Stabilization
Laser systems stabilized by reference cavities have many applications in science and modern technologies. In this research, a compact high-finesse cavity made of ULE (ultra low expansion) glass in a compact va...
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Article
Comparison of Three Ultrastable Lasers with a Femtosecond Frequency Comb
The comparison of optical oscillators is used both to determine their spectral characteristics and to perform fundamental research. To describe each individual laser system, it is necessary to compare at least...
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Article
Experimental Study of the Optical Qubit on the 435-nm Quadrupole Transition in the 171Yb+ Ion
Ultracold ions provide one of the most promising platforms for quantum computing and make it possible to reach record coherence times, the fidelity of preparation and readout operations, and single- and two-qu...
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Article
Linear Paul Trap for Quantum Logic Experiments
The design of a linear ion Paul trap for quantum-logical operations on ultracold ions with high reliability is developed. The general requirements for the trap are presented, its parameters are optimized, and ...
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Article
Optimization of the Normal Mode Spectrum of Linear Ion Crystals in Paul Traps for EIT Cooling Using an Optical Lattice
Ions in radio-frequency traps are widely used in various fields of applied and fundamental physics, such as metrology and quantum computing. One of the important tasks required for modern experiments is deep c...
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Article
Long ULE Cavities with Relative Fractional Frequency Drift Rate below 5 × 10–16/s for Laser Frequency Stabilization
Two ultrastable laser systems for the clock transition spectroscopy in the strontium frequency standard are developed. The high stability of laser radiation frequency is provided by the active loop for frequen...
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Article
Three-Dimensional Paul Trap with High Secular Frequency for Compact Optical Clock
The Paul ion trap is developed for the use in a compact frequency standard based on a single ytterbium ion. The design features are the use of atomic ovens for compensating for parasitic electric fields and go...
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Article
Optimization of Raman Cooling of 25Mg+ Ion to Ground Vibrational State in Linear Paul Trap
The sideband cooling method and its implementation on the Raman transition of 25Mg+ is presented. The process is numerically simulated under the conditions of experiments at the Lebedev Physical Institute. Laser ...
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Article
Compact Transportable Optical Standard Based on a Single 171Yb+ Ion (“YBIS” Project)
The schematic diagram of the compact transportable optical frequency standard based on the quadrupole transition in a single 171Yb+ ion with a relative instability at the levelx of 5 · 10−16, less than 1m3 in vol...
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Article
A Compact Second-Harmonic Generator for Tasks of Precision Spectroscopy Within the Range of 240–600 nm
We develop a universal design of a second-harmonic generator enabling a high-efficiency conversion of the CW laser radiation to a range of 240–600 nm. The distinctive features of the generator are its compact ...
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Article
Improved measurement of the hyperfine structure of the laser cooling level \(4f^{12}(^3H_6)5d_{5/2}6s^2\) \((J=9/2)\) in \({}^{169}_{\,\,69}{{\mathrm {Tm}}}\)
We report on an improved measurement of the hyperfine constant of the \(4f^{12}(^3 H_6)5d_{5/2}6s^2\) ...
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Article
Secondary laser cooling of strontium-88 atoms
The secondary laser cooling of a cloud of strontium-88 atoms on the 1 S 0–3 P 1 (689...
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Article
The density of states in the mobility gap of amorphous hydrogenated silicon doped with erbium
The effect of do** films of amorphous hydrogenated silicon (a-Si:H) with erbium on the density of the states in the mobility gap is studied. The data obtained are compared with those for a-Si:H films doped with...
