We develop an integrated efficient multiresonator quantum memory scheme based on a system of three interacting resonators coupled through a common resonator to an external waveguide via switchable coupler. It is shown that high-precision parameter matching based on step-by-step optimization makes it possible to efficiently store the signal field and enables on-demand retrieval of the signal at specified time moments. Possible experimental implementations and practical applications of the proposed quantum memory scheme are discussed.
View Article and Find Full Text PDFIn this work, we propose a universal (spectral-topological) approach towards the realization of the quantum memory, consisting of a small number of controlled absorbers, providing a super-high quantum efficiency of more than 99.9% required for practical quantum information science. In this way, we have found a series of spectral-topological matching conditions for the spectroscopic parameters of the absorbers which ensure the maximal efficiency in the broadband spectral range due to controlling the relative position (topology) of the eigenfrequencies in the absorbers spectrum.
View Article and Find Full Text PDFIn this paper we experimentally demonstrated a broadband scheme of the multiresonator quantum memory-interface. The microwave photonic scheme consists of the system of mini-resonators strongly interacting with a common broadband resonator coupled with the external waveguide. We have implemented the impedance matched quantum storage in this scheme via controllable tuning of the mini-resonator frequencies and coupling of the common resonator with the external waveguide.
View Article and Find Full Text PDFSingle-photon detectors based on avalanche photodiodes (SPADs) are key elements of many modern highly sensitive optical systems. One of the bottlenecks of such detectors is an afterpulsing effect, which limits detection rate and requires an optimal hold-off time. In this paper, we propose a novel approach for statistical analysis of SPAD dark counts, and we demonstrate its usefulness for the search of the experimental condition where the afterpulsing effect can be strongly eliminated.
View Article and Find Full Text PDFCalorimetry proved disorders of peripheral thermoregulation in vibration disease patients. The authors suggested formulae to calculate specific rate of heat flow from hand surface. Calorimetry was proved appropriate for early diagnosis of vibration disease associated with acroangiospasm fits.
View Article and Find Full Text PDFMed Tr Prom Ekol
January 1996
The follow-up studies of patients with vibration disease caused by local vibration proved diagnostic value of minor skin response of dorsal hand surface and anterior surface of arm or forearm, if subjected to irritation with mixture of chloroform and ethanol. Depressed skin receptors during the disease are diagnosed through longer latent period of burning sensation in two of three points irritated on skin of the upper limb. The diagnostic method based on chemical stimulation of skin receptors is highly sensitive (86.
View Article and Find Full Text PDFDrug-free techniques in the treatment of occupational dermatoses present a major clinical research problem area. The active hyperemia local barotherapy technique was tested as a possible solution to this problem. 52 occupational eczema cases were studied, part of which, in addition to routine drug therapy, were exposed to local barotherapy.
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