On-demand microwave generator of shaped single photons

We demonstrate the full functionality of a circuit that generates single microwave photons on demand, with a wave packet that can be modulated with a near-arbitrary shape. We achieve such a high tunability by coupling a superconducting qubit near the end of a semi-infinite transmission line. A dc superconducting quantum interference device shunts the line to ground and is employed to modify the spatial dependence of the electromagnetic mode structure in the transmission line. This control allows us to couple and decouple the qubit from the line, shaping its emission rate on fast time scales. Our decoupling scheme is applicable to all types of superconducting qubits and other solid-state systems and can be generalized to multiple qubits as well as to resonators.Comment: 10 pages, 7 figures. Published versio

Response of coriander (Coriandrum sativum L.) cultivars to graded levels of vermicompost

A field study was undertaken at Sakaleshpur (Karnataka, India) to study the response of three cultivars of corriander (Coriandrum sativum) to graded levels ofvermicompost in comparison with chemical fertilization (NPK). The study indicated that application of vermicompost significantly increased herbage and seed yield and was comparable to chemical fertilization. The herbage yield was maximum in Rcr-41 (6067.5 kg/ha) at 60th day after sowing when 15 t/ha of vermicompost was applied. Seed yield was maximum in Rcr-41 (1314 kg/ha) in plants treated with 20tlha vermicompost. The study also showed that vermicompost can be used as an alternative nutrient source for coriander cultivation. &nbsp

Generating Multimode Entangled Microwaves with a Superconducting Parametric Cavity

In this Letter, we demonstrate the generation of multimode entangled states of propagating microwaves. The entangled states are generated by parametrically pumping a multimode superconducting cavity. By combining different pump frequencies, applied simultaneously to the device, we can produce different entanglement structures in a programable fashion. The Gaussian output states are fully characterized by measuring the full covariance matrices of the modes. The covariance matrices are absolutely calibrated using an in situ microwave calibration source, a shot noise tunnel junction. Applying a variety of entanglement measures, we demonstrate both full inseparability and genuine tripartite entanglement of the states. Our method is easily extensible to more modes.Comment: 5 pages, 1 figures, 1 tabl

Response of coriander (Coriandrum sativum L.) cultivars to graded levels of vermicompost

A field study was undertaken at Sakaleshpur (Karnataka, India) to study the response of three cultivars of corriander (Coriandrum sativum) to graded levels ofvermicompost in comparison with chemical fertilization (NPK). The study indicated that application of vermicompost significantly increased herbage and seed yield and was comparable to chemical fertilization. The herbage yield was maximum in Rcr-41 (6067.5 kg/ha) at 60th day after sowing when 15 t/ha of vermicompost was applied. Seed yield was maximum in Rcr-41 (1314 kg/ha) in plants treated with 20tlha vermicompost. The study also showed that vermicompost can be used as an alternative nutrient source for coriander cultivation. &nbsp

Standardisation of rooting media for propagation of vanilla (Vanilla planifolia Andr.)

Evaluation of various rooting media indicated that vermicompost and decomposed coir pith were ideal for rooting and multiplication of vanilla (Vanilla planifolia). &nbsp

Etfect of biostimulants on the growth and biomass of secondary nursery seedlings of cardamom

A nursery experiment was undertaken at the Indian Cardamom Research Institute, Myladumpara to understand the effectofbios tim ulants on the growth and biomass of secondary nursery cardamom s<ledlings. Five biostimulants at different concentrations were sprayed at 30- day intervals for a period of 120 days. The results indicated that biostimulants such as vipul (a tricontanol- containing commercial product), Ergostim (N-acetyl thiazolidne-4-carboxylic acid & folic acid - containing commercial product), pure folic acid, low levels ofsimazine and 2,4-D significantly increased the growth and dry matter production. The results suggest, that application ofbiostimulants not only reduces the nursery period but also helps in getting vigorous seedlings for better establishment in the field. &nbsp