Stationary two-atom entanglement induced by nonclassical two-photon correlations

A system of two two-level atoms interacting with a squeezed vacuum field can exhibit stationary entanglement associated with nonclassical two-photon correlations characteristic of the squeezed vacuum field. The amount of entanglement present in the system is quantified by the well known measure of entanglement called concurrence. We find analytical formulas describing the concurrence for two identical and nonidentical atoms and show that it is possible to obtain a large degree of steady-state entanglement in the system. Necessary conditions for the entanglement are nonclassical two-photon correlations and nonzero collective decay. It is shown that nonidentical atoms are a better source of stationary entanglement than identical atoms. We discuss the optimal physical conditions for creating entanglement in the system, in particular, it is shown that there is an optimal and rather small value of the mean photon number required for creating entanglement.Comment: 17 pages, 5 figure

Struktur Histologi Otot Femur Kelinci (Lepus SP.) Setelah Perlakuan Implantasi Material Stainless Steel Aisi 316l Selama 2,5 Bulan

Production implant orthopedic domestic with 316L Stainless steel base material which use the material dimensions of the Indonesian non-import until now hasn't been researched. Research the effect of implantation of these materials to health conditions need to be conducted on animal models, such as the rabbit before it wad applied to humans. This study aims to determine the histological changes in the femoral muscle of rabbits after implantation of AISI 316L stainless steel for 2.5 months, as part of the basic data for further research in order to figure out orthopedic implants that can be used by the body. This study compared the P0: rabbit was not given implantation of stainless steel AISI 316L with P1: Rabbits were given treatment AISI 316L stainless steel implants in the quadriceps femoris muscle parallel to the femur bone. Implantation of the implant material was conducted for 2.5 months. Histological changes observed were the presence or absence of necrosis, fibrosis and tissue cavities in the rabbit femoral muscle tissue. The results showed there were no three variables were observed. It is concluded AISI 316L stainless steel did not cause structural changes in muscle histology in a rabbit femur after implantation for 2.5 months; so that these materials can be used as an implant material in the body

Pemberian Berbagai Jenis Pakan Organik terhadap Kandungan β-Karoten dalam Telur Puyuh Jepang (Coturnix Japonica)

Penelitian ini bertujuan untuk optimalisasi kualitas telur puyuh yang kaya β-karoten. Penelitian ini adalah penelitian eksperimental dengan Rancangan Acak Lengkap (RAL). Hewan yang digunakan untuk produksi telur adalah 60 puyuh Jepang (Coturnix japonica) betina dikelompokkan dalam 4 kelompok percobaan, yaitu P0: Kontrol (puyuh diberi pakan komersial), P1: Puyuh diberi perlakuan dengan pakan organik standar, P2: Puyuh yang diberi perlakuan pakan organik yang mengandung ikan kembung, daun singkong + serbuk kunyit P3: Puyuh yang diberi perlakuan pakan organic yang mengandung rumput laut, daun singkong + serbuk kunyit. Masing-masing perlakuan terdiri dari 15 kali ulangan percobaan. Data dianalisis dengan Anova, dilanjutkan dengan uji Duncan (α=0.05.) Hasil penelitian menunjukkan bahwa pemberian perlakuan pakan organik pada puyuh menyebabkan bobot telur puyuh menjadi lebih kecil dibandingkan yang tidak diberi perlakuan akan organik. Tidak terdapat perbedaan nyata terhadap konsumsi pakan dan bobot kuning telur, namun terdapat peningkatan rasio bobot kuning telur : bobot telur, peningkatan kadar β-karoten pada telur puyuh organik, baik pada P1, P2, dan P3.Hasil penelitian dapat disimpulkan bahwa pemberian pakan organik dapat meningkatkan kandungan β-karoten dalam telur puyuh

Perbandingan Struktur Histologi Magnum Pada Itik Magelang, Itik Tegal Dan Itik Pengging

Duck is one of comodity in livestock which its productivity needs to be improved. The duck productivity is related to physiological function of the reproductive ogans. Magelang ducks, Tegal ducks and Pengging ducks have the potential to be developed. This research was aimed for comparing magnum hystology structure among Magelang Duck, Tegal Duck, and Pengging Duck. There were six ducks on each breed and at the age of six months old taken from breeding and cultivation ofnon-ruminant livestock, Banyubiru, regency Ambarawa, Used parafin method by Hematoxylin and Eosin staining. The data of magnum histology structure of magelang duck, tegal duck, and pengging duck that descriptively analyzed with captured and microscopic observation at first. Data of long reproductive tract, reproductive tract weight and ovarian weight were analyzed by using Analysis of Varian (ANOVA), by a further test of Least Significant Differences (LSD) test at the level of 95%. Data analized of long reproductive tract, reproductive tract weight and ovarian weight did not show the significant difference. The histological structure on Magelang duck, Tegal duck and Pengging duck showed epithelial cells differentiated into ciliated epithelial cells and goblet cells and sub epithelial gland that had developed. It was concluded the magnum histological structure its not difference on Magelang ducks, Tegal ducks and Pengging ducks on 6 months old