Storage of Nuclear Excitation Energy through Magnetic Switching

Shvyd’ko, Yu. V.; Hertrich, T.; Bürck, U. van; Gerdau, E.; Leupold, O.; Metge, J.; Rüter, H. D.; Schwendy, S.; Смирнов, Г. В.; Potzel, W.; Schindelmann, P.

doi:10.1103/physrevlett.77.3232

Cited by 103 publications

(154 citation statements)

References 12 publications

(11 reference statements)

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“…This can be achieved, e.g., by using the magnetic switching technique demonstrated in Ref. [19], or by externally destroying the spatial coherence throughout the lifetime of the excitonic state. In Sec.…”

Section: B Control Of the Cooperative Branching Ratiomentioning

confidence: 99%

“…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 arises from the fact that the resonant scattering off the nuclear ensemble (for instance identical nuclei in a crystal lattice) occurs via an excitonic state, i.e., an excitation coherently spread out over * Palffy@mpi-hd.mpg.de † Keitel@mpi-hd.mpg.de ‡ Joerg.Evers@mpi-hd.mpg.de a large number of nuclei.…”

mentioning

confidence: 99%

“…This has been exploited in the experiment reported in [19], in which a suitable rotation of the direction of an applied magnetic field was used to suppress the coherent decay over a certain period. The observed storage of energy in an excitonic state was achieved by inducing destructive interference among the coherent decay channels [19,25], in direct analogy to electromagnetically induced transparency [26] and spontaneous emission suppression via spontaneously generated coherences [10] well known from atomic quantum optics. Next to this externally induced interference, also the cooperative nature of NFS was exploited in a recent experiment [20], which could experimentally verify the presence of a cooperative Lamb shift theoretically pre-FIG.…”

mentioning

confidence: 99%

“…Since due to the narrow linewidth of the nuclear transitions the life time of the exciton is sufficiently long, the latter can be externally manipulated before it decays. This has been exploited in the experiment reported in [19], in which a suitable rotation of the direction of an applied magnetic field was used to suppress the coherent decay over a certain period. The observed storage of energy in an excitonic state was achieved by inducing destructive interference among the coherent decay channels [19,25], in direct analogy to electromagnetically induced transparency [26] and spontaneous emission suppression via spontaneously generated coherences [10] well known from atomic quantum optics.…”

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confidence: 99%

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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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Section: B Control Of the Cooperative Branching Ratiomentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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

2011

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“…[61][62][63][64][65][66][67][68][69] The application of external perturbations that are synchronized to the pulse timing of SR is a unique method. [70][71][72] Studies of slow dynamics have also been performed using SR. [73][74][75] …”

Section: Energy Domain Measurementmentioning

confidence: 99%

Condensed Matter Physics Using Nuclear Resonant Scattering

Seto

2013

J. Phys. Soc. Jpn.

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Mössbauer spectroscopy is a powerful and well-established method used in a wide variety of scientific applications. An outstanding feature of this method is that element specific information on electronic and phonon states can be obtained. The use of high-brilliance synchrotron radiation as an excitation source for Mössbauer measurements enables measurements to be recorded under extreme conditions such as high pressures, very high or very low temperatures, and strong external magnetic fields. In addition, the tunability of synchrotron radiation energy allows a wide range of nuclides to be used. Moreover, the use of synchrotron radiation enables the measurement of the element-and sitespecific phonon density of states. Another unique property of the method is the narrow energy width of the nuclear excited states, due to which the method is an effective tool for studying the slow dynamics of soft matter and glass transitions. The concepts and methods involved in these measurements are introduced and discussed, and the unique features of the methods are highlighted.

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Mössbauer Excitation by Synchrotron Radiation

2003

Handbook of Nuclear Chemistry

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Storage of Nuclear Excitation Energy through Magnetic Switching

Cited by 103 publications

References 12 publications

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

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

Condensed Matter Physics Using Nuclear Resonant Scattering

Mössbauer Excitation by Synchrotron Radiation

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