Nuclear Exciton Echo Produced by Ultrasound in Forward Scattering of Synchrotron Radiation

Smirnov, G. V.; Bürck, U. van; Arthur, John R.; Popov, S. L.; Baron, A. Q. R.; Chumakov, A. I.; Ruby, S. L.; Potzel, W.; Brown, G. S.

doi:10.1103/physrevlett.77.183

Cited by 46 publications

(44 citation statements)

References 14 publications

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“…Hence the road for studying single hard xray photons is paved. Hard x-ray photons may interact with inner shell electrons of an atom [38,39], highly charged ions [40,41] or alternatively with nuclei [42,43]. Some advantages of using nuclei are:…”

Section: Introductionmentioning

confidence: 99%

“…Nuclei can be embedded in a solid-state sample [42][43][44][45] such that one does not need a very complicated ion trap [40,41] or a gas cell [38,39] to contain them.…”

Section: Introductionmentioning

confidence: 99%

“…The number of nuclei bound in a crystal [42][43][44][45] interacting with photons can be many orders of magnitude greater than the number of trapped ions in a gas cell [38,39,41] or an ion trap.…”

Section: Introductionmentioning

confidence: 99%

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Coherent Control of Nuclei and X-Rays

Liao

2014

Springer Theses

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The possibility of mutual control of nuclei and photons offered by the emerging field of nuclear quantum optics is theoretically investigated in three different applications. This extension of quantum optics towards nuclei is motivated by modern X-ray Free Electron Lasers (XFEL) which open the possibility to coherently control nuclear states. As a first application we investigate the coherent population transfer between nuclear states in a three-level system driven by an XFEL. Such a level scheme is relevant for the triggering of isomers and might play a role for future energy storage solutions. The other way around, nuclei offer a platform to control single x-ray photons, which can be focused on spots essentially smaller than a single atom and used in future photonic circuits. The second part of this thesis puts forward a nuclear forward scattering setup that allows coherent control of a single x-ray photon using 57 Fe nuclei. Finally, we show that nuclear quantum optics provides a significant improvement for detection in nuclear physics. The low-lying isomeric transition of 229 Th can be addressed by VUV lasers and provides a potential next generation frequency standard. A main impediment is the large uncertainty of the nuclear transition frequency. Using an electromagnetically modified nuclear forward scattering setup, we show that coherence effects can reduce this uncertainty down to an unprecedented level.Within the framework of this thesis, the following articles were published in refereed journals:

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Section: Introductionmentioning

confidence: 99%

“…Nuclei can be embedded in a solid-state sample [42][43][44][45] such that one does not need a very complicated ion trap [40,41] or a gas cell [38,39] to contain them.…”

Section: Introductionmentioning

confidence: 99%

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Coherent Control of Nuclei and X-Rays

Liao

2014

Springer Theses

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“…Control of the coherent decay of the nuclear exciton has been already used to produce gamma echos in NFS experiments originally using Mössbauer sources [43]. Subsequently nuclear exciton echos produced by ultrasound vibrations of the sample in NFS of SR were observed [44]. The coherent decay was manipulated in this experiment via the relative phase between the electromagnetic field scattered from two sample foils.…”

Section: Control Of the Coherent Decay Via Magnetic Switchingmentioning

confidence: 99%

Coherent control of the cooperative branching ratio for nuclear x-ray pumping

2011

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Coherent control of nuclear pumping in a three level system driven by x-ray light is investigated. In single nuclei, the pumping performance is determined by the branching ratio of the excited state populated by the x-ray pulse. Our results are based on the observation that in ensembles of nuclei, cooperative excitation and decay leads to a greatly modified nuclear dynamics, which we characterize by a time-dependent cooperative branching ratio. We discuss prospects of steering the x-ray pumping by coherently controlling the cooperative decay. First, we study an ideal case with purely superradiant decay and perfect control of the cooperative emission. A numerical analysis of x-ray pumping in nuclear forward scattering with coherent control of the cooperative decay via externally applied magnetic fields is presented. Next, we provide an extended survey of nuclei suitable for our scheme, and propose proof-of-principle implementations already possible with typical Mössbauer nuclear systems such as 57 Fe. Finally, we discuss the application of such control techniques to the population or depletion of long-lived nuclear states. PACS numbers: 73.20.Mf, 78.70.Ck, 75.78.Jp, 76.80.+y Coherent control in quantum optics and atomic physics provides an efficient tool to investigate atomic properties and favorably manipulate the dynamics of the system alike. Similar possibilities with nuclear systems have been considered with great interest [1-8] already shortly after the realization of the first laser in the optical band [9]. However, many quantum optical control schemes require the effective coupling of the driving field to the considered transition (Rabi frequency) to be of the same order as the relaxation rate of the same transition [10,11]. Consequently it is very demanding to exploit the direct laser driving of nuclear systems experimentally. Furthermore, the dream of the nuclear laser is at present equally out of reach. The pursuit of coherent sources for wavelengths around or below 1 nm is supported however by the advent and commissioning of x-ray free electron lasers [12,13], the availability of which will stimulate the transfer of quantum optical schemes to nuclei along these lines.A different route to coherent control of nuclear dynamics which does not rely on forthcoming x-ray light sources is coherent light scattering off nuclei in the low-excitation limit [14][15][16][17][18]. In particular, coherent nuclear forward scattering (NFS) is a routine technique experimentally studied in many labs around the world. In NFS, high-frequency light such as that from a synchrotron radiation (SR) source is monochromatized at a nuclear resonance energy, and then scatters coherently off a nuclear target. As has recently been realized, while being conceptionally different from the attempts to directly transfer quantum optical schemes to the nuclear realm, NFS does allow to explore coherent control of nuclei in experimental settings already available today [19][20][21][22]. The possibility of control exploited in these works ar...

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“…A kind of photon storage and photon shaping was studied using synchrotron radiation (see, for example, Refs. [12][13][14])…”

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confidence: 99%

Radiation burst from a singleγ-photon field

2011

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The radiation burst from a single gamma-photon field interacting with a dense resonant absorber is studied theoretically and experimentally. This effect was discovered for the fist time by P. Helisto et al., Phys. Rev. Lett. 66, 2037Lett. 66, (1991 and it was named "gamma echo". The echo is generated by 180-degree phase shift of the incident radiation field, attained by an abrupt change of the position of the absorber with respect to the radiation source during the coherence time of the photon wave packet. Three distinguishing cases of "gamma echo" are considered, i.e., the photon is in exact resonance with the absorber, close to resonance (on the slope of the absorption line), and far from resonance (on the far wings of the resonance line). In resonance the amplitude of the radiation burst is two times larger than the amplitude of the input radiation field just before its phase shift. This burst was explained by P. Helisto et al. as a result of constructive interference of the coherently scattered field with the phase shifted input field, both having almost the same amplitude. We found that out of resonance the scattered radiation field acquires an additional component with almost the same amplitude as the amplitude of the incident radiation field. The phase of the additional field depends on the optical thickness of the absorber and resonant detuning.Far from resonance this field interferes destructively with the phase-shifted incident radiation field and radiation quenching is observed. Close to resonance three fields interfere constructively and the amplitude of the radiation burst is three times larger than the amplitude of the input radiation field.

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Nuclear Exciton Echo Produced by Ultrasound in Forward Scattering of Synchrotron Radiation

Cited by 46 publications

References 14 publications

Coherent Control of Nuclei and X-Rays

Coherent Control of Nuclei and X-Rays

Coherent control of the cooperative branching ratio for nuclear x-ray pumping

Radiation burst from a singleγ-photon field

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