R &amp; D coordination in industry and university

Steck, R.

doi:10.1016/0048-7333(75)90022-0

Research Policy

1975

DOI: 10.1016/0048-7333(75)90022-0

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R & D coordination in industry and university

R. Steck

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1976

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Cited by 4 publications

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“…The system is then transformed into a rotating frame to remove the time-dependence [22] and obtain the steady state solution. When calculating emission spectra as a † a , we leave the E P term out and add a pump term in the Liouvillian as P L[a † ], where P represents the laser power.…”

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confidence: 99%

Photon blockade in two-emitter-cavity systems

et al. 2017

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The photon blockade (PB) effect in emitter-cavity systems depends on the anharmonicity of the ladder of dressed energy eigenstates. The recent developments in color center photonics are leading toward experimental demonstrations of multi-emitter-cavity solid-state systems with an expanded set of energy levels compared to the traditionally studied single-emitter systems. We focus on the case of N = 2 nonidentical quasi-atoms strongly coupled to a nanocavity in the bad cavity regime (with parameters within reach of the color center systems), and discover three PB mechanisms: polaritonic, subradiant and unconventional. The polaritonic PB, which is the conventional mechanism studied in single-emitter-cavity systems, also occurs at the polariton frequencies in multi-emitter systems. The subradiant PB is a new interference effect owing to the inhomogeneous broadening of the emitters which results in a purer and a more robust single photon emission than the polaritonic PB. The unconventional PB in the modeled system corresponds to the suppression of the singleand two-photon correlation statistics and the enhancement of the three-photon correlation statistic. Using the effective Hamiltonian approach, we unravel the origin and the time-domain evolution of these phenomena.Introduction-While an arbitrary number of photons can populate a bare nanocavity, the paradigm changes with the introduction of a strongly coupled dipole emitter. The photon blockade (PB) effect prevents the absorption of the second photon at specific frequencies due to the nonlinearity of the emitter that dresses the energy states and leads to an anharmonic ladder. This effect has been extensively studied in single-emitter (N = 1) atomic [1, 2] and quantum dot [3,4] cavity quantum electrodynamics (CQED), as well as in circuit QED systems [5]. Here, the effect occurs at the frequencies of the dressed states so-called polaritons (polaritonic PB) and results in a faster emission rate of single photons compared to the bare emitter. Experimentally, a signature of single photon emission has been the reduced value of the second order coherence g (2) (0) < 1. A recent paper has contested this criterion [6], demonstrating conditions for the so-called unconventional photon blockade where the twophoton statistic is suppressed, but the enhanced higher order coherences strengthen the generation of multiple photons. A cavity coupled to multiple (N 1) emitters would offer a richer set of dressed states and extend new opportunities for nonclassical light generation with applications in quantum key distribution [7], quantum metrology [8] and quantum computation [9]. Moreover,

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Photon blockade in two-emitter-cavity systems

et al. 2017

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How can research on research contribute to a better management of university research?

Steck

1976

R & D Management

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In recent years new forms of research organizations have been established at universities, which have been faced to a much higher degree with problems of research management. This circumstance provides the main reason for starting research on research in the university field on a new basis.In the 'Sonderforschungrbereich 7 9 , a large interdisciplinary research unit at Hannover University concerned with 'water research in the coastal area', a symbiosis and active co-operation was arranged between a small group of scientists engaged in research on research and a large number of scientists and engineers of several disciplines. The strong liaison between R o R scientists and their subject of investigation is institutionally organized. The purpose of this liaison is to involve R o R scientists in a feed-back process with a large university research organization and its actual management problems. The results to date have been encouraging and indicate that such an experiment can be a very worthwhile exercise.

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Convergence of Basic and Applied Research? Research Orientations in German High-Temperature Superconductor Research

Jansen

1995

Science, Technology, & Human Values

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In the industrialized countries university research and state-financed research are increasingly evaluated from the point of view of their contribution to technology transfer, industrial innovation, and the competitiveness of national industries. Political debates on the viability of orienting basic research toward practical applications are paralleled by discussions, among social scientists, about the risks and opportunities of political direction over science. These debates are the frame of reference for this study, which analyzes the differences between basic and applied research, their correlates and consequences, in high-temperature superconductor research in the Federal Republic of Germany. It will be shown that basic and applied research are fundamentally different in their social organization, their research goals, and their research strategies. These differences are in contrast to the call of science policy for more intense interaction and assimilation. Nevertheless, there are conditions under which basic or applied re searchers will partially follow "foreign" orientations and strategies. These conditions may, in part, be shaped by policy decisions.

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R & D coordination in industry and university

Cited by 4 publications

References 1 publication

Photon blockade in two-emitter-cavity systems

Photon blockade in two-emitter-cavity systems

How can research on research contribute to a better management of university research?

Convergence of Basic and Applied Research? Research Orientations in German High-Temperature Superconductor Research

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