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 Letters

Storage of Nuclear Excitation Energy through Magnetic Switching

Yuri V. Shvyd'ko, T. Hertrich, Uwe van Bürck, Erich Gerdau, O. Leupold, Joachim Metge, H. D. Rüter, S. Schwendy, G. V. Smirnov, W. Potzel, P. Schindelmann

Published Oct 7, 1996• 99 citations
Publisher

Abstract

The decay rate of ${}^{57}\mathrm{Fe}$ nuclei in an ${}^{57}{\mathrm{FeBO}}_{3}$ crystal excited by 14.4 keV synchrotron radiation pulses was controlled by switching the direction of the crystal magnetization. Abrupt switching some nanoseconds after excitation suppresses the coherent nuclear decay. Switching back at later times restores it, starting with an intense radiation spike. The enhanced delayed reemission is due to the release of the energy stored during the period of suppression. Suppression and restoration originate from drastic changes of the nuclear states and of the interference within the nuclear transitions.

DOI
10.1103/physrevlett.77.3232

Related papers

Coherent Excitations of Nuclei in Crystals by Synchrotron Radiation Pulses

G. T. Trammell, J. P. Hannon

Synchrotron pulses will excite low lying nuclear levels, and in crystals, will create nuclear exciton states which are spatially coherent superpositions of the various excited state hyperfine levels of all the nuclei in the crystal. The subsequent radiative decay is radically affected by coherence, exhibiting both a speed-up due to "coherent enhancement", and a quantum beat modulation of the decay rate which gives a periodic speed-up/slow-down of the rate for photon decay into the coherent channels. For a nuclear exciton in an antiferromagnet, the quantum beat modulation will result in an interesting "temporal pendulösung" effect.

Short Wavelength Coherent Radiation: Generation and Applications•Jan 1, 1988•0 citations

Coherent re-emission of gamma -quanta in the forward direction after a stepwise change of the energy of nuclear excitation

Yuri V. Shvyd'ko, S. L. Popov, G. V. Smirnov

The re-emission of gamma -quanta in the forward direction by an ensemble of excited nuclei after abruptly changing the energy of the nuclear excitation is studied. A sublevel of the 14.4 keV excited state with a definite spin projection of 57 Fe nuclei in a magnetic 57 FeBO 3 crystal is selectively populated. The abrupt change of the energy of the excited nuclear state is achieved by fast (<or=5 ns) reversal of the hyperfine (HF) magnetic field direction at the nuclei. The nuclear target was a black absorber prior to HF field reversal. A short (about 10 ns) intense flash followed by beats of gamma -radiation intensity is detected with some delay after reversal. The delay of the flash and the beat period depend on the HF nuclear transition excited. The duration of the flash depends on the effective thickness of the nuclear target. The theory developed interprets the time evolution of the re-emission as a result of the interference of two main spectral components of gamma -radiation. The first one has the original frequency, which represents the primary radiation. The second one has a shifted frequency, which represents radiation coherently re-emitted in the forward direction from the nuclear sublevel with energy changed by the HF field reversal. The observations reveal the feasibility of inelastic coherent gamma -resonance scattering and demonstrate the enhancement of the radiative channel in the coherent re-emission of gamma -radiation in the forward direction.

Journal of Physics Condensed Matter•Mar 8, 1993•29 citations

Coherent control of nuclear forward scattering

Adriana Pálffy, Jörg Evers

The possibility to control the coherent decay of resonant excitations in nuclear forward scattering is investigated. By changing abruptly the direction of the nuclear hyperfine magnetic field, the coherent scattering of photons can be manipulated and even completely suppressed via quantum interference effects between the nuclear transition currents. The efficiency of the coherent decay suppression and the dependence of the scattered light polarization on the specific switching parameters is analyzed in detail. Using a sophisticated magnetic switching sequence involving four rotations of the hyperfine magnetic field, two correlated coherent decay pulses with different polarizations can be generated out of one excitation, providing single-photon entanglement in the keV regime. The verification of the generated entanglement by testing a single-particle version of Bell's inequality in an X-ray optics experimental setup is put forward.

arXiv:1003.3668•Journal of Modern Optics•Sep 18, 2010•10 citations

Stopping Narrow-Band X-Ray Pulses in Nuclear Media

Xiangjin Kong, Adriana Pálffy

A control mechanism for stopping x-ray pulses in resonant nuclear media is investigated theoretically. We show that narrow-band x-ray pulses can be mapped and stored as nuclear coherence in a thin-film planar x-ray cavity with an embedded ^{57}Fe nuclear layer. The pulse is nearly resonant to the 14.4 keV Mössbauer transition in the ^{57}Fe nuclei. The role of the control field is played here by a hyperfine magnetic field which induces interference effects reminiscent of electromagnetically induced transparency. We show that, by switching off the control magnetic field, a narrow-band x-ray pulse can be completely stored in the cavity for approximately 100 ns. Additional manipulation of the external magnetic field can lead to both group velocity and phase control of the pulse in the x-ray cavity sample.

arXiv:1508.06762•Physical Review Letters•May 10, 2016•31 citations

Suppression of nuclear elastic forward scattering in experiments with trains of ultrashort pulses

Petr M. Anisimov, Yuri V. Rostovtsev, J. Odeurs

We study nuclear elastic forward scattering of synchrotron radiation. In a simple model, we show that suppression of nuclear excitation by synchrotron radiation as well as nuclear elastic forward scattering are possible due to the formation of nuclear coherent population trapping. We consider a nucleus with ground- and excited-state nuclear momenta , , respectively. We demonstrate that nuclear coherent population trapping can be achieved for random phases of pulses in synchrotron radiation.

Journal of Modern Optics•Oct 25, 2006•1 citation

Generation of Short Hard-X-Ray Pulses of Tailored Duration Using a Mössbauer Source

Wang, G., Liao, W.

We theoretically investigate a scheme for the generation of single hard-x-ray pulses of controllable duration in the range of 1–100 ns from a radioactive Mössbauer source. The scheme uses a magnetically perturbed 57FeBO3 crystal illuminated with recoilless 14.4-keV photons from a 57Co radioisotope nuclide. Such a compact x-ray source is useful for the extension of quantum optics to the 10-keV energy scale, which has been in the spotlight in recent years. So far, experimental achievements have mostly been attained in synchrotron radiation facilities. However, the use of tabletop and portable hard-x-ray sources for time-resolved measurements and for implementing coherent control over nuclear quantum-optics systems has still been limited. The availability of compact hard-x-ray sources may become the engine for the application of quantum-information schemes down to the subatomic scale. We demonstrate that the present method is versatile and provides an economic solution, utilizing a Mössbauer source, to perform time-resolved nuclear scattering, to produce suitable pulses for photon storage, and to flexibly generate x-ray single-photon entanglement.

•Jul 6, 2018•10 citations
The decay rate of 57Fe{}^{57}\mathrm{Fe}57Fe nuclei in an 57FeBO3{}^{57}{\mathrm{FeBO}}_{3}57FeBO3​ crystal excited by 14.4 keV synchrotron radiation pulses was controlled by switching the direction of the crystal magnetization. Abrupt switching some nanoseconds after excitation suppresses the coherent nuclear decay. Switching back at later times restores it, starting with an intense radiation spike. The enhanced delayed reemission is due to the release of the energy stored during the period of suppression. Suppression and restoration originate from drastic changes of the nuclear states and of the interference within the nuclear transitions.
Synchrotron pulses will excite low lying nuclear levels, and in crystals, will create nuclear exciton states which are spatially coherent superpositions of the various excited state hyperfine levels of all the nuclei in the crystal. The subsequent radiative decay is radically affected by coherence, exhibiting both a speed-up due to "coherent enhancement", and a quantum beat modulation of the decay rate which gives a periodic speed-up/slow-down of the rate for photon decay into the coherent channels. For a nuclear exciton in an antiferromagnet, the quantum beat modulation will result in an interesting "temporal pendulösung" effect.
The re-emission of gamma -quanta in the forward direction by an ensemble of excited nuclei after abruptly changing the energy of the nuclear excitation is studied. A sublevel of the 14.4 keV excited state with a definite spin projection of 57 Fe nuclei in a magnetic 57 FeBO 3 crystal is selectively populated. The abrupt change of the energy of the excited nuclear state is achieved by fast (<or=5 ns) reversal of the hyperfine (HF) magnetic field direction at the nuclei. The nuclear target was a black absorber prior to HF field reversal. A short (about 10 ns) intense flash followed by beats of gamma -radiation intensity is detected with some delay after reversal. The delay of the flash and the beat period depend on the HF nuclear transition excited. The duration of the flash depends on the effective thickness of the nuclear target. The theory developed interprets the time evolution of the re-emission as a result of the interference of two main spectral components of gamma -radiation. The first one has the original frequency, which represents the primary radiation. The second one has a shifted frequency, which represents radiation coherently re-emitted in the forward direction from the nuclear sublevel with energy changed by the HF field reversal. The observations reveal the feasibility of inelastic coherent gamma -resonance scattering and demonstrate the enhancement of the radiative channel in the coherent re-emission of gamma -radiation in the forward direction.
The possibility to control the coherent decay of resonant excitations in nuclear forward scattering is investigated. By changing abruptly the direction of the nuclear hyperfine magnetic field, the coherent scattering of photons can be manipulated and even completely suppressed via quantum interference effects between the nuclear transition currents. The efficiency of the coherent decay suppression and the dependence of the scattered light polarization on the specific switching parameters is analyzed in detail. Using a sophisticated magnetic switching sequence involving four rotations of the hyperfine magnetic field, two correlated coherent decay pulses with different polarizations can be generated out of one excitation, providing single-photon entanglement in the keV regime. The verification of the generated entanglement by testing a single-particle version of Bell's inequality in an X-ray optics experimental setup is put forward.
A control mechanism for stopping x-ray pulses in resonant nuclear media is investigated theoretically. We show that narrow-band x-ray pulses can be mapped and stored as nuclear coherence in a thin-film planar x-ray cavity with an embedded ^{57}Fe nuclear layer. The pulse is nearly resonant to the 14.4 keV Mössbauer transition in the ^{57}Fe nuclei. The role of the control field is played here by a hyperfine magnetic field which induces interference effects reminiscent of electromagnetically induced transparency. We show that, by switching off the control magnetic field, a narrow-band x-ray pulse can be completely stored in the cavity for approximately 100 ns. Additional manipulation of the external magnetic field can lead to both group velocity and phase control of the pulse in the x-ray cavity sample.
We theoretically investigate a scheme for the generation of single hard-x-ray pulses of controllable duration in the range of 1–100 ns from a radioactive Mössbauer source. The scheme uses a magnetically perturbed 57FeBO3 crystal illuminated with recoilless 14.4-keV photons from a 57Co radioisotope nuclide. Such a compact x-ray source is useful for the extension of quantum optics to the 10-keV energy scale, which has been in the spotlight in recent years. So far, experimental achievements have mostly been attained in synchrotron radiation facilities. However, the use of tabletop and portable hard-x-ray sources for time-resolved measurements and for implementing coherent control over nuclear quantum-optics systems has still been limited. The availability of compact hard-x-ray sources may become the engine for the application of quantum-information schemes down to the subatomic scale. We demonstrate that the present method is versatile and provides an economic solution, utilizing a Mössbauer source, to perform time-resolved nuclear scattering, to produce suitable pulses for photon storage, and to flexibly generate x-ray single-photon entanglement.