Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Physical Review Research

Acoustically controlled periodic γ -optical signals described by semiclassical theory

Vlastimil Vrba, Michal Hausner, Aleš Stejskal, Vít Procházka

Published May 12, 2025• 0 citations
Publisher

Abstract

This study provides a detailed theoretical description of periodic γ -ray intensity signals. These signals are generated by the tabletop time coincidence experimental setups which utilize nuclear resonant interaction of γ -photons from a radioactive source with an absorber exhibiting ultrasonic vibrations. Transmission of the γ -radiation field through the absorber is described by semiclassical theory considering arbitrary periodic motion of the absorber. A key aspect of the presented work is the application of the Fourier analysis. A fundamental relation between the Fourier coefficients of the γ -ray intensity signal and the Fourier coefficients of a complex exponential of the absorber motion is derived. Application of this relation is shown on the example of the trapezoid motion, which demonstrates its usability for systematic inspection of the discussed signals. The results of the analysis expand the knowledge of the coherent manipulation of γ -photons and may find usage in a broad range of research fields utilizing γ -ray sources.

DOI
10.1103/l33j-xstp

Related papers

Acoustically controlled polarization states of resonant γ-photons

Vlastimil Vrba, Michal Koutný, Jan Kočiščák +7 more

Coherent control of light and its interactions with matter is a key aspect of quantum optics. Nuclear resonant interactions enable coherent manipulation of photons at X-ray and γ -ray energies. One promising approach to manipulating γ -photons emitted by radioactive sources exploits ultrasonically vibrating nuclear resonant absorbers. However, previous studies have focused on unpolarized γ -radiation interacting with isotropic resonant media without exploiting polarization effects. Here, we demonstrate simultaneous temporal control of the waveform and polarization state of γ -photons by combining ultrasonic vibrations of magnetically ordered resonant absorbers with anisotropy in nuclear resonant scattering. This method allows interlinking phase differences of individual resonant interaction paths with their polarization dependence. A particular consequence is the possibility to form double-pulse γ -radiation sequences with tunable time-dependent polarization states. Using the reported method, coherent control of γ -photons can be expanded to polarization-based experiments and related applications in quantum optics can be further explored using a tabletop γ -optical setup.

Communications Physics•Oct 30, 2026•0 citations

Toward flexible intensity control of resonantly scattered γ -rays using multi-frequency vibrating resonant absorber

Aleš Stejskal, Vlastimil Vrba, Vít Procházka

We report a method for coherent control of γ-photons, enabling the shaping of γ-ray intensity in nearly arbitrary waveforms. Different intensity waveforms are created by adjusting the motion profile of a resonant absorber (an ensemble of Mössbauer nuclei) and tuning the energy of the incident radiation. A crucial aspect of this method is the use of a low fundamental frequency of vibrations, which broadens the possibilities for γ-ray control. The results of numerical simulations are experimentally validated by generating single and double γ-pulses and inducing short-term absorption. For this, a resonant absorber containing 57Fe nuclei was vibrated with different motion profiles composed of 12 harmonics with a fundamental frequency of 1 MHz. The proposed technique represents an advancement in the manipulation of γ-rays, and potentially x rays, paving the way for the performance of unique types of γ-ray or x-ray quantum experiments and the development of tools such as adjustable table-top γ-pulse sources or γ-ray or x-ray delays and gates. Moreover, inverse application of the method enables investigation of motion at the picometer scale.

arXiv:2410.05277•Applied Physics Letters•Feb 1, 2025•2 citations

Stimulated emission and coherent control of gamma photons described by quantum mechanical model

Michal Hausner, Vít Procházka, Vlastimil Vrba

Creating a coherent source of gamma radiation remains one of the biggest motivations in gamma-ray optics. Such a source would utilize the stimulated emission of gamma photons. However, to achieve lasing in the high-energy regime other physical principles such as the lasing without inversion are needed to be explored. One of the currently developed approaches uses coherent control of gamma radiation waveforms to induce transparency in a medium by applying ultra-acoustic vibrations. In this paper a theoretical description of the stimulated emission and coherent control of gamma rays is developed on the basis of a one-dimensional quantum mechanical formalism. The model of the gamma radiation coherent control shows a good agreement with the conventional semiclassical description of the phenomenon. The model of the stimulated emission was developed with the assumptions which enable to propose a specific experimental arrangement for simultaneous detections of pairs of gamma photons. This proposal is further discussed in the context of the experimental observation of the stimulated emission of gamma photons.

Physical Review Research•Jun 5, 2025•1 citation

Acoustically induced transparency for synchrotron hard x-ray photons

I. R. Khairulin, Yevgeny V. Radeonychev, V. A. Antonov +1 more

Abstract The induced transparency of opaque medium for resonant electromagnetic radiation is a powerful tool for manipulating the field-matter interaction. Various techniques to make different physical systems transparent for radiation from microwaves to x-rays were implemented. Most of them are based on the modification of the quantum-optical properties of the medium under the action of an external coherent electromagnetic field. Recently, an observation of acoustically induced transparency (AIT) of the 57Fe absorber for resonant 14.4-keV photons from the radioactive 57Co source was reported. About 150-fold suppression of the resonant absorption of photons due to collective acoustic oscillations of the nuclei was demonstrated. In this paper, we extend the AIT phenomenon to a novel phase-locked regime, when the transmitted photons are synchronized with the absorber vibration. We show that the advantages of synchrotron Mössbauer sources such as the deterministic periodic emission of radiation and controlled spectral-temporal characteristics of the emitted photons along with high-intensity photon flux in a tightly focused beam, make it possible to efficiently implement this regime, paving the way for the development of the acoustically controlled interface between hard x-ray photons and nuclear ensembles.

Scientific Reports•Apr 12, 2021•10 citations

γ -ray-pulse formation in a vibrating recoilless resonant absorber

V. A. Antonov, Yevgeny V. Radeonychev, Olga A. Kocharovskaya

We study propagation of $\ensuremath{\gamma}$ radiation from a M\"ossbauer radioactive source through a vibrating recoilless resonant absorber and find the optimal conditions to produce a periodic train of $\ensuremath{\gamma}$-ray pulses with maximum peak intensity, several times higher than the intensity from the source, and minimum duration, much shorter than the lifetime of the emitting nuclear state of the source. The shape, duration, and repetition rate of the pulses are tunable in a wide range. We propose modifications of the recently reported experiment [F. Vagizov et al., Nature (London) 508, 80 (2014)] to produce pulses with higher peak intensity and shorter duration using absorbers enriched by the resonant nuclei and discuss possible applications of the generated pulses for the time-domain M\"ossbauer spectroscopy.

Physical Review A•Aug 21, 2015•11 citations

π phase-shift induced transparency of resonant gamma radiation

Gilbert R. Hoy, J. Odeurs, Romain Coussement

The so-called gamma-echo effect has been observed experimentally and analyzed using the semiclassical optical theory. Here the effect is reinterpreted using a new 1D quantum mechanical model. This leads to a different interpretation of the effect as a π phase-shift induced transparency. In the basic time-differential Mössbauer spectroscopic technique the forward-scattered recoil-free radiation is observed, in delayed coincidence, after passing through a nuclear-resonant absorber. The effect in question is produced most efficiently when the source of recoil-free radiation is moved abruptly causing a π phase shift of the source radiation during its radiative lifetime. Using the 1D model the effect is seen to arise from the constructive interference between the source radiation at a later time, and the radiation coming from the absorber excited at an earlier time. The exact form of the source modulation and the nuclear-resonant thickness of the resonant absorber determines the shape of the time-differential resonant gamma ray transmission spectrum. Numerical results are given using the familiar 57Fe recoil-free resonant transition. The π phase-shift-induced transparency allows the resonant gamma radiation, incident on the resonant absorber, to be transmitted through the absorber without appreciable attenuation.

Laser and Particle Beams•Apr 1, 2000•2 citations
This study provides a detailed theoretical description of periodic γ -ray intensity signals. These signals are generated by the tabletop time coincidence experimental setups which utilize nuclear resonant interaction of γ -photons from a radioactive source with an absorber exhibiting ultrasonic vibrations. Transmission of the γ -radiation field through the absorber is described by semiclassical theory considering arbitrary periodic motion of the absorber. A key aspect of the presented work is the application of the Fourier analysis. A fundamental relation between the Fourier coefficients of the γ -ray intensity signal and the Fourier coefficients of a complex exponential of the absorber motion is derived. Application of this relation is shown on the example of the trapezoid motion, which demonstrates its usability for systematic inspection of the discussed signals. The results of the analysis expand the knowledge of the coherent manipulation of γ -photons and may find usage in a broad range of research fields utilizing γ -ray sources.
Coherent control of light and its interactions with matter is a key aspect of quantum optics. Nuclear resonant interactions enable coherent manipulation of photons at X-ray and γ -ray energies. One promising approach to manipulating γ -photons emitted by radioactive sources exploits ultrasonically vibrating nuclear resonant absorbers. However, previous studies have focused on unpolarized γ -radiation interacting with isotropic resonant media without exploiting polarization effects. Here, we demonstrate simultaneous temporal control of the waveform and polarization state of γ -photons by combining ultrasonic vibrations of magnetically ordered resonant absorbers with anisotropy in nuclear resonant scattering. This method allows interlinking phase differences of individual resonant interaction paths with their polarization dependence. A particular consequence is the possibility to form double-pulse γ -radiation sequences with tunable time-dependent polarization states. Using the reported method, coherent control of γ -photons can be expanded to polarization-based experiments and related applications in quantum optics can be further explored using a tabletop γ -optical setup.
We report a method for coherent control of γ-photons, enabling the shaping of γ-ray intensity in nearly arbitrary waveforms. Different intensity waveforms are created by adjusting the motion profile of a resonant absorber (an ensemble of Mössbauer nuclei) and tuning the energy of the incident radiation. A crucial aspect of this method is the use of a low fundamental frequency of vibrations, which broadens the possibilities for γ-ray control. The results of numerical simulations are experimentally validated by generating single and double γ-pulses and inducing short-term absorption. For this, a resonant absorber containing 57Fe nuclei was vibrated with different motion profiles composed of 12 harmonics with a fundamental frequency of 1 MHz. The proposed technique represents an advancement in the manipulation of γ-rays, and potentially x rays, paving the way for the performance of unique types of γ-ray or x-ray quantum experiments and the development of tools such as adjustable table-top γ-pulse sources or γ-ray or x-ray delays and gates. Moreover, inverse application of the method enables investigation of motion at the picometer scale.
Creating a coherent source of gamma radiation remains one of the biggest motivations in gamma-ray optics. Such a source would utilize the stimulated emission of gamma photons. However, to achieve lasing in the high-energy regime other physical principles such as the lasing without inversion are needed to be explored. One of the currently developed approaches uses coherent control of gamma radiation waveforms to induce transparency in a medium by applying ultra-acoustic vibrations. In this paper a theoretical description of the stimulated emission and coherent control of gamma rays is developed on the basis of a one-dimensional quantum mechanical formalism. The model of the gamma radiation coherent control shows a good agreement with the conventional semiclassical description of the phenomenon. The model of the stimulated emission was developed with the assumptions which enable to propose a specific experimental arrangement for simultaneous detections of pairs of gamma photons. This proposal is further discussed in the context of the experimental observation of the stimulated emission of gamma photons.
Abstract The induced transparency of opaque medium for resonant electromagnetic radiation is a powerful tool for manipulating the field-matter interaction. Various techniques to make different physical systems transparent for radiation from microwaves to x-rays were implemented. Most of them are based on the modification of the quantum-optical properties of the medium under the action of an external coherent electromagnetic field. Recently, an observation of acoustically induced transparency (AIT) of the 57Fe absorber for resonant 14.4-keV photons from the radioactive 57Co source was reported. About 150-fold suppression of the resonant absorption of photons due to collective acoustic oscillations of the nuclei was demonstrated. In this paper, we extend the AIT phenomenon to a novel phase-locked regime, when the transmitted photons are synchronized with the absorber vibration. We show that the advantages of synchrotron Mössbauer sources such as the deterministic periodic emission of radiation and controlled spectral-temporal characteristics of the emitted photons along with high-intensity photon flux in a tightly focused beam, make it possible to efficiently implement this regime, paving the way for the development of the acoustically controlled interface between hard x-ray photons and nuclear ensembles.
We study propagation of $\ensuremath{\gamma}$ radiation from a M\"ossbauer radioactive source through a vibrating recoilless resonant absorber and find the optimal conditions to produce a periodic train of $\ensuremath{\gamma}$-ray pulses with maximum peak intensity, several times higher than the intensity from the source, and minimum duration, much shorter than the lifetime of the emitting nuclear state of the source. The shape, duration, and repetition rate of the pulses are tunable in a wide range. We propose modifications of the recently reported experiment [F. Vagizov et al., Nature (London) 508, 80 (2014)] to produce pulses with higher peak intensity and shorter duration using absorbers enriched by the resonant nuclei and discuss possible applications of the generated pulses for the time-domain M\"ossbauer spectroscopy.
The so-called gamma-echo effect has been observed experimentally and analyzed using the semiclassical optical theory. Here the effect is reinterpreted using a new 1D quantum mechanical model. This leads to a different interpretation of the effect as a π phase-shift induced transparency. In the basic time-differential Mössbauer spectroscopic technique the forward-scattered recoil-free radiation is observed, in delayed coincidence, after passing through a nuclear-resonant absorber. The effect in question is produced most efficiently when the source of recoil-free radiation is moved abruptly causing a π phase shift of the source radiation during its radiative lifetime. Using the 1D model the effect is seen to arise from the constructive interference between the source radiation at a later time, and the radiation coming from the absorber excited at an earlier time. The exact form of the source modulation and the nuclear-resonant thickness of the resonant absorber determines the shape of the time-differential resonant gamma ray transmission spectrum. Numerical results are given using the familiar 57Fe recoil-free resonant transition. The π phase-shift-induced transparency allows the resonant gamma radiation, incident on the resonant absorber, to be transmitted through the absorber without appreciable attenuation.