Sometimes it's . Enstrom: His size and durability are forever being questioned -- he did play all 82 last year -- but what is often overlooked is he makes his D partner better, he is positionally sound is and effective with his stick. 's former teammates have predictably been his Authentic Dennis Smith Jersey during the scandal , but Revis doesn't play that game. Trade Mark . Whiteside is fourth with 2 blocks while is ninth with 1. Again, all of this Baseball Jerseys Cheap is a moot point if the M's 't make the postseason. The 32-year-old right-hander was hit hard all afternoon, but he managed to subsist until then. 't want to do a lot of biceps because you get biceps tendonitis, he said. No need to Lane Johnson Womens Jersey him out on running downs … he's excellent blocker. Fans have also said that could never be replaced, showing just how difficult it be for a new actor to come . Cheap Jerseys China He was a who had a good knuckleball, and the more we saw it the more we liked it.

DEVANTE SMITH-PELLY, RW, DEVILS He's a bulldozer the corners, and he's shown Wholesale Jerseys post- streakiness the past. While IIHF President Fasel would like a final decision sooner than later to plan for South Korea, Renney said Hockey Canada could put a team together quickly. The Yankees clearly value pitch-framing and I'm certain they'll have Sanchez work on it going forward. Chi.: Was part of a defense that limited the Bear to just 143 total yards of offense… at NE: Hauled his Lac Edwards Youth Jersey INT of the and 15th of his career…Returned the pick 63 yards, a career … Stephen Vogt Jersey flying with pains The 1997 was a sign of things to come. Offense excelling for Flyers recent weeks. The Patriots and the New England Dairy and Food Council teamed up for the Fuel Up to Play 60 Student Summit, Cheap Jerseys Usa where students were encouraged to achieve a healthy lifestyle and to celebrate the students' work to improve school wellness through the afterschool program. Just seeing guys I watched growing up like Rivers, Antonio Gates and all those guys, it was Ron Jaworski Youth Jersey

Dobrodošli
fulmrzu2

Zadnja novica: Cezijev BEC potrjen: Tc = 20 nK, N = 15000 (31.3.2017).

Dobrodošli na spletni strani prvega slovenskega laboratorija za hladne atome. Na Institutu Jožef Stefan postavljamo eksperimentalni sistem za pripravo Bose-Einsteinovega kondenzata cezijevih atomov.

Bose-Einsteinov kondenzat je stanje sklopljenih bozonov. Če so atomi bozoni, potem pri dovolj nizki temperaturi velik delež atomov zasede najnižje kvantno stanje, kar se manifestira kot supertekočnost. Supertekočnost je makroskopski pojav, kjer se snov obnaša kot kvantna tekočina brez viskoznosti, in je analogen pojavu superprevodnosti v trdni snovi. Zaradi te analogije lahko Bose-Einsteinov kondenzat uporabimo kot kvantni simulator fizike trdne snovi. Z njim lahko raziskujemo fiziko močno koreliranih elektronov, na primer pojav superprevodnosti.

Atome cezija se najprej upočasni in ujame s pomočjo laserske svetlobe in magnetooptične pasti. Pri tem se atomi ohladijo na temperaturo nekaj sto μK. V naslednjem koraku se atome z metodo Ramanskih prehodov zbere v izbrano dobro definirano nizkoležeče energijsko stanje. Temperatura atomov pri tem pade pod 1 μK. Takrat se atome z izredno močnimi laserji ujame v takoimenovano optično past, kjer se jih v zadnjem koraku še dodatno ohladi z metodo izparevanja. Temperatura doseže območje nK, kar je dovolj nizko, da atomi kondenzirajo.

Za bodoče raziskave, kjer bomo kot eksperimentalno metodo uporabili hladne atome, smo si zastavili naslednje možne smernice.

Eksperimenti na optičnem kristalu: Kvantni plini atomov v optičnem kristalu postajajo glavno orodje za simulacijo fizike trdne snovi. Atomi igrajo vlogo elektronov v trdni snovi, kjer je bistveno to, da lahko gibanje atomov po kristalni mreži natančno kontroliramo. Z optičnim kristalom tako lahko raziskujemo fiziko močno koreliranih elektronov, ki vodi do pojavov, kot sta superprevodnost in magnetizem. Z ustrezno izbiro geometrije optične mreže lahko raziskujemo tudi magnetizem v frustriranih sistemih, kjer teorija napoveduje eksotična osnovna stanja, kot je na primer spinska tekočina.

Sintetična polja: Atomi so sicer električno nevtralni, torej nimajo naboja, vendar lahko z uporabo laserske svetlobe in gradientov magnetnega polja ustvarimo efektivne skalarne in vektorske potenciale, ki odigrajo vlogo električne in magnetne sile na atome. Na ta način lahko simuliramo kvantne pojave, ki jih poznamo iz fizike trdne snovi, na primer kvantni Hallov pojav.

Izvenravnovesna dinamika: Medtem ko je fizika ravnovesnih pojavov dobro raziskana in sprejeta, pa je fizika neravnovesnih pojavov znatno manj raziskana, bistveno manj intuitivna in lahko vodi k novim spoznanjem, ki utegnejo imeti dalekosežne učinke na naravoslovno znanost, morda tudi na družboslovje in ekonomijo. Hladni atomi so zaradi svoje fleksibilnosti izjemen laboratorij za študij izvenravnovesne dinamike.