Babban Bang ko 'Rebound'? Masana kimiyya sun yi rashin jituwa a kan yadda da gaske sararin samaniya ya soma

O Big Bang ou o 'Rebote'?  Cientistas discordam sobre como o universo realmente começou

Aƙalla abin da ƙirar sararin samaniya ke tunani ke nan. Menene idan Duniyar mu ba ta ɓace ba - shin za ta tarwatse, sake faɗaɗa kuma ta sake tarwatse kamar babban huhu?

Irin wannan ka'idar ba ta yaɗu ba, amma a cewar wasu masana kimiyyar sararin samaniya, haifuwa, mutuwa da sake haifuwar Duniyarmu wataƙila ɗaya ce kawai a cikin doguwar sarkar da ba ta da farko ko ƙarshe. Ana iya kiransa ba Babban Bang ba, amma Babban Bounce.

Yanzu masana kimiyya sun nuna cewa sabon sabuntawa ga hasashen Big Bounce, wanda ya warware manyan matsaloli tare da hasashe, har yanzu yana da wasu manyan kurakurai.

"Mutane sun ba da shawarar ra'ayin 'billa' sararin samaniya kamar sararin samaniya yana shimfidawa har abada a baya, amma mun nuna cewa ɗayan sabbin nau'ikan waɗannan samfuran ba su aiki da gaske," in ji masanin ilimin kimiyya na Jami'ar Buffalo Will. Kinney. - Ko da yake wannan sabon nau'in samfurin yana magance matsalolin entropy, ko da Duniya tana da zagayawa, har yanzu dole ne ta fara. "

Ka'idar samfurin da aka fi yarda da ita a duniya a yau tana iƙirarin cewa ta taso ne daga mafarin farko da ake kira singularity. Kimanin shekaru biliyan 13,8 da suka wuce, sararin samaniya saboda wasu dalilai ya fara faɗaɗa daga wani ɗan lokaci da sararin samaniya mara fahimta.

Abin baƙin ciki shine, ƙirar da Babban Bang ya dogara a kansu ba su da ɗanɗano don bayyana yadda wannan bambance-bambancen zai kasance.

A madadin babban hasashe na Big Bounce, ba a sami ma'anar mufuradi ba, saboda kawai babu shi a cikin wannan ka'idar. Don haka duniya ba ta rugujewa, sai dai ta farfado.

Duk da haka, wannan hasashe ba a bayyana gaba ɗaya ba. Halin “tsalle” akai-akai dole ne kuma ya kasance yana siffanta shi da haɓaka entropy, ma'auni na rikicewar duniya. Idan Big Bang daya ne kawai daga cikin fashe-fashe da yawa, da ya kamata entropy ya yi girma sosai, amma ba haka ba. A haƙiƙa, da a ce sararin duniya yana da girma a lokacin Babban Bang, duniyar da muke gani yanzu ba za ta wanzu ba.

2019 The Big Bounce Theory na iya numfasawa tare da buga wani samfurin da aka yi wa kwaskwarima wanda ke ba da mafita ga wannan babbar matsala da ta kayar da hasashen shekaru da yawa. Masana kimiyya sun gano cewa a duk lokacin da sararin samaniya ya faɗaɗa, ƙwanƙolinsa yana "diluted" ko ta yaya ya isa ya ba da damar sararin samaniya ya koma yadda yake kafin tsalle na gaba.

Wannan binciken yana da matuƙar mahimmanci saboda ka'idar Big Bounce za a iya sake la'akari da samfurin sararin samaniya. Yanzu, duk da haka, wasu masana kimiyya sun yi abin da suka yi mafi kyau: sun sami sabon maɗaukaki a cikin samfurin da aka sabunta.

ƙididdiga kuma sun gano cewa sararin samaniyar duniya ba zai iya ci gaba da komawa baya ba har abada.

"A takaice dai, mun nuna cewa magance wannan matsala ta entropy ya haifar da yanayi, wanda ke nuna cewa sararin samaniya ya kasance yana da mafari," in ji W. Kinney. - Lissafin mu gabaɗaya ya nuna cewa duk wani ƙirar cyclic wanda aka kawar da entropy ta hanyar haɓaka dole ne ya fara.

Wannan baya nufin cewa Universe mai zagayawa ba zata iya wanzuwa ba. Tawagar ta lura cewa aikinsu bai shafi samfurin physicist Roger Penrose na sararin samaniyar cyclic ba, wanda ake kira conformal cyclic cosmology. Dangane da sigar su ta sararin samaniya mai maimaitawa, kowane zagayowar yana faɗaɗa kuma baya yin kwangila. Wannan batu ne mai rikitarwa wanda zai buƙaci ƙarin bincike.

Amma a yanzu, yana kama da ka'idar Big Bounce zata ɗauki ɗan lokaci kaɗan don tabbatar da kanta.

N.Stein ya ce: "Tunanin cewa akwai wani lokaci a baya wanda babu wani abu - babu lokaci - ba ya ba mu zaman lafiya, don haka muna son sanin abin da ya zo a baya," in ji N.Stein. - Duk da haka, a yanzu za mu iya cewa a cikin samfurori da ke la'akari da entropy, ya kamata a sami "farko".

An buga binciken a cikin Journal of Cosmology da Astroparticle Physics.

Faɗakarwar Kimiyya ce ta bayar.

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