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发布时间:2019-10-23 12:33:58 来源: 湖北日报

el Survive a Theory of Eveing 时间旅行在万有理论下理论下可行吗?Tom Sie Siegfried 汤姆·西格弗里德In many many univses, typicallally those onV shows orin movies, me travel is not much moore difficultt than driving downtown in ny major ci during rush hoour.In real ll life, time travel isn't easy. In act, it's probrobably impssible, a fantasy more farfetched than vi visiting Al's Wonderlannd, findingld at the enend of a rainboainbow or clecleansing all all the hate peech off of FFacebook.Yime travel dodoes not nessarily violatate the la of physics. InIn Einstein's  theory of gvity — genral relativvity — space ae and timere merged apacetime,  allows for th the possibity of pathway that could bennd back topast and l back to the uture. Such hs are known  as closed timelike curves.NNobody thinksthat general lativity's ttime loops  would be pracractical for tiime travel evenn if they arare possible. F. For one thingthing, theht exist only  under certaiain circumstancances — the iverse wouldd have to be ro rotating,  not expandiding — as the mathematician Kurt G deel showed in the 1940sBut the univeiverse is ending, and prorobably isnt rotatingo that damthe prospectts for revisitisiting the Stone Age or aor acquirinng a pet dinoosaur.Besies, even if suc such pathwayays did ext, buildingship to travese them wocost more th all the DeLoreeans (and all other traortation vehiehicles) ever made. It wwould need a crcruising speof 140,000 mis per seconnd with nolace to stop fofor gas (or hatever), thefuel tank  have to be morore than arillion times es the size of of an oil tanker.So for pr practical pururposes, time travel'sime has not yt yet arrived. But even if it it's possible only in pinciple, the pe potential ram ramificatns for the basic physicscs of the univverse mightmake it worth th the time  to investigagate it.A firt step would be to attempt toto figure out exactly whthe relevant laws of pics really areare. Einsts general relivity is great, but itably not  the last rd about the pphysics of th universe. After all, it coexists uly with quantntum mechan, which rules tthe subatomic world and pressumably, sce everythig is made obatomic stuff, the rest ot of the universe as we Whether thequantum–genereral relativy combo truly permitsime travel might depend on hat the ultimae correct ththeory combg the two turnss out to be.Sevveral candidatte theories havhave been deoped for merging general relativity and quantum mechancs into a ununified theoryy. It's anen questionwhether these ese candidates would allollow time avel in somethething like e the way genergeneral relatity does, phihilosopher Christian Wüthrüthrich of thehe University of Geneva notes in a neww paper.It'sssible, he say, that a try that supepersedes generl relativitght still  some way inclinclude the equ equivalent  general relatelativity's  timelike loops.Even if timime loops t in the fundamental theor though, te's still n guarantee tat they woulduld be preserved in the emrgent large-scscale spacetime that woululd be relevant in real life. For that atter, Wüthrichrich pointst, predictining the exice of time  travel loops might be takenen as evidencnce against tt the theor, considerng the serous likelihood that timime travel r really isn possible at al all.In any case, investigaating whetheruantum graity theories rretain generl relativiy's time travvel loophoan illuminae many tough questions that  must be aed to develop lop a succssful theory and understtand how it  relates to geneneral relaty. “For tis reason aloalone,” Wüthrich writes, “the questioon of time el beyond geral relativitis worth or while.”在许多宇宙,多宇宙,通常是影视剧中的的宇宙,时间旅行并不比高峰时段在任何一个大城市的闹市区开区开车困难多少。可兑换现金手机捕鱼 el Survive a Theory of Eveing 时间旅行在万有理论下理论下可行吗?Tom Sie Siegfried 汤姆·西格弗里德In many many univses, typicallally those onV shows orin movies, me travel is not much moore difficultt than driving downtown in ny major ci during rush hoour.In real ll life, time travel isn't easy. In act, it's probrobably impssible, a fantasy more farfetched than vi visiting Al's Wonderlannd, findingld at the enend of a rainboainbow or clecleansing all all the hate peech off of FFacebook.Yime travel dodoes not nessarily violatate the la of physics. InIn Einstein's  theory of gvity — genral relativvity — space ae and timere merged apacetime,  allows for th the possibity of pathway that could bennd back topast and l back to the uture. Such hs are known  as closed timelike curves.NNobody thinksthat general lativity's ttime loops  would be pracractical for tiime travel evenn if they arare possible. F. For one thingthing, theht exist only  under certaiain circumstancances — the iverse wouldd have to be ro rotating,  not expandiding — as the mathematician Kurt G deel showed in the 1940sBut the univeiverse is ending, and prorobably isnt rotatingo that damthe prospectts for revisitisiting the Stone Age or aor acquirinng a pet dinoosaur.Besies, even if suc such pathwayays did ext, buildingship to travese them wocost more th all the DeLoreeans (and all other traortation vehiehicles) ever made. It wwould need a crcruising speof 140,000 mis per seconnd with nolace to stop fofor gas (or hatever), thefuel tank  have to be morore than arillion times es the size of of an oil tanker.So for pr practical pururposes, time travel'sime has not yt yet arrived. But even if it it's possible only in pinciple, the pe potential ram ramificatns for the basic physicscs of the univverse mightmake it worth th the time  to investigagate it.A firt step would be to attempt toto figure out exactly whthe relevant laws of pics really areare. Einsts general relivity is great, but itably not  the last rd about the pphysics of th universe. After all, it coexists uly with quantntum mechan, which rules tthe subatomic world and pressumably, sce everythig is made obatomic stuff, the rest ot of the universe as we Whether thequantum–genereral relativy combo truly permitsime travel might depend on hat the ultimae correct ththeory combg the two turnss out to be.Sevveral candidatte theories havhave been deoped for merging general relativity and quantum mechancs into a ununified theoryy. It's anen questionwhether these ese candidates would allollow time avel in somethething like e the way genergeneral relatity does, phihilosopher Christian Wüthrüthrich of thehe University of Geneva notes in a neww paper.It'sssible, he say, that a try that supepersedes generl relativitght still  some way inclinclude the equ equivalent  general relatelativity's  timelike loops.Even if timime loops t in the fundamental theor though, te's still n guarantee tat they woulduld be preserved in the emrgent large-scscale spacetime that woululd be relevant in real life. For that atter, Wüthrichrich pointst, predictining the exice of time  travel loops might be takenen as evidencnce against tt the theor, considerng the serous likelihood that timime travel r really isn possible at al all.In any case, investigaating whetheruantum graity theories rretain generl relativiy's time travvel loophoan illuminae many tough questions that  must be aed to develop lop a succssful theory and understtand how it  relates to geneneral relaty. “For tis reason aloalone,” Wüthrich writes, “the questioon of time el beyond geral relativitis worth or while.”在许多宇宙,多宇宙,通常是影视剧中的的宇宙,时间旅行并不比高峰时段在任何一个大城市的闹市区开区开车困难多少。

el Survive a Theory of Eveing 时间旅行在万有理论下理论下可行吗?Tom Sie Siegfried 汤姆·西格弗里德In many many univses, typicallally those onV shows orin movies, me travel is not much moore difficultt than driving downtown in ny major ci during rush hoour.In real ll life, time travel isn't easy. In act, it's probrobably impssible, a fantasy more farfetched than vi visiting Al's Wonderlannd, findingld at the enend of a rainboainbow or clecleansing all all the hate peech off of FFacebook.Yime travel dodoes not nessarily violatate the la of physics. InIn Einstein's  theory of gvity — genral relativvity — space ae and timere merged apacetime,  allows for th the possibity of pathway that could bennd back topast and l back to the uture. Such hs are known  as closed timelike curves.NNobody thinksthat general lativity's ttime loops  would be pracractical for tiime travel evenn if they arare possible. F. For one thingthing, theht exist only  under certaiain circumstancances — the iverse wouldd have to be ro rotating,  not expandiding — as the mathematician Kurt G deel showed in the 1940sBut the univeiverse is ending, and prorobably isnt rotatingo that damthe prospectts for revisitisiting the Stone Age or aor acquirinng a pet dinoosaur.Besies, even if suc such pathwayays did ext, buildingship to travese them wocost more th all the DeLoreeans (and all other traortation vehiehicles) ever made. It wwould need a crcruising speof 140,000 mis per seconnd with nolace to stop fofor gas (or hatever), thefuel tank  have to be morore than arillion times es the size of of an oil tanker.So for pr practical pururposes, time travel'sime has not yt yet arrived. But even if it it's possible only in pinciple, the pe potential ram ramificatns for the basic physicscs of the univverse mightmake it worth th the time  to investigagate it.A firt step would be to attempt toto figure out exactly whthe relevant laws of pics really areare. Einsts general relivity is great, but itably not  the last rd about the pphysics of th universe. After all, it coexists uly with quantntum mechan, which rules tthe subatomic world and pressumably, sce everythig is made obatomic stuff, the rest ot of the universe as we Whether thequantum–genereral relativy combo truly permitsime travel might depend on hat the ultimae correct ththeory combg the two turnss out to be.Sevveral candidatte theories havhave been deoped for merging general relativity and quantum mechancs into a ununified theoryy. It's anen questionwhether these ese candidates would allollow time avel in somethething like e the way genergeneral relatity does, phihilosopher Christian Wüthrüthrich of thehe University of Geneva notes in a neww paper.It'sssible, he say, that a try that supepersedes generl relativitght still  some way inclinclude the equ equivalent  general relatelativity's  timelike loops.Even if timime loops t in the fundamental theor though, te's still n guarantee tat they woulduld be preserved in the emrgent large-scscale spacetime that woululd be relevant in real life. For that atter, Wüthrichrich pointst, predictining the exice of time  travel loops might be takenen as evidencnce against tt the theor, considerng the serous likelihood that timime travel r really isn possible at al all.In any case, investigaating whetheruantum graity theories rretain generl relativiy's time travvel loophoan illuminae many tough questions that  must be aed to develop lop a succssful theory and understtand how it  relates to geneneral relaty. “For tis reason aloalone,” Wüthrich writes, “the questioon of time el beyond geral relativitis worth or while.”在许多宇宙,多宇宙,通常是影视剧中的的宇宙,时间旅行并不比高峰时段在任何一个大城市的闹市区开区开车困难多少。 el Survive a Theory of Eveing 时间旅行在万有理论下理论下可行吗?Tom Sie Siegfried 汤姆·西格弗里德In many many univses, typicallally those onV shows orin movies, me travel is not much moore difficultt than driving downtown in ny major ci during rush hoour.In real ll life, time travel isn't easy. In act, it's probrobably impssible, a fantasy more farfetched than vi visiting Al's Wonderlannd, findingld at the enend of a rainboainbow or clecleansing all all the hate peech off of FFacebook.Yime travel dodoes not nessarily violatate the la of physics. InIn Einstein's  theory of gvity — genral relativvity — space ae and timere merged apacetime,  allows for th the possibity of pathway that could bennd back topast and l back to the uture. Such hs are known  as closed timelike curves.NNobody thinksthat general lativity's ttime loops  would be pracractical for tiime travel evenn if they arare possible. F. For one thingthing, theht exist only  under certaiain circumstancances — the iverse wouldd have to be ro rotating,  not expandiding — as the mathematician Kurt G deel showed in the 1940sBut the univeiverse is ending, and prorobably isnt rotatingo that damthe prospectts for revisitisiting the Stone Age or aor acquirinng a pet dinoosaur.Besies, even if suc such pathwayays did ext, buildingship to travese them wocost more th all the DeLoreeans (and all other traortation vehiehicles) ever made. It wwould need a crcruising speof 140,000 mis per seconnd with nolace to stop fofor gas (or hatever), thefuel tank  have to be morore than arillion times es the size of of an oil tanker.So for pr practical pururposes, time travel'sime has not yt yet arrived. But even if it it's possible only in pinciple, the pe potential ram ramificatns for the basic physicscs of the univverse mightmake it worth th the time  to investigagate it.A firt step would be to attempt toto figure out exactly whthe relevant laws of pics really areare. Einsts general relivity is great, but itably not  the last rd about the pphysics of th universe. After all, it coexists uly with quantntum mechan, which rules tthe subatomic world and pressumably, sce everythig is made obatomic stuff, the rest ot of the universe as we Whether thequantum–genereral relativy combo truly permitsime travel might depend on hat the ultimae correct ththeory combg the two turnss out to be.Sevveral candidatte theories havhave been deoped for merging general relativity and quantum mechancs into a ununified theoryy. It's anen questionwhether these ese candidates would allollow time avel in somethething like e the way genergeneral relatity does, phihilosopher Christian Wüthrüthrich of thehe University of Geneva notes in a neww paper.It'sssible, he say, that a try that supepersedes generl relativitght still  some way inclinclude the equ equivalent  general relatelativity's  timelike loops.Even if timime loops t in the fundamental theor though, te's still n guarantee tat they woulduld be preserved in the emrgent large-scscale spacetime that woululd be relevant in real life. For that atter, Wüthrichrich pointst, predictining the exice of time  travel loops might be takenen as evidencnce against tt the theor, considerng the serous likelihood that timime travel r really isn possible at al all.In any case, investigaating whetheruantum graity theories rretain generl relativiy's time travvel loophoan illuminae many tough questions that  must be aed to develop lop a succssful theory and understtand how it  relates to geneneral relaty. “For tis reason aloalone,” Wüthrich writes, “the questioon of time el beyond geral relativitis worth or while.”在许多宇宙,多宇宙,通常是影视剧中的的宇宙,时间旅行并不比高峰时段在任何一个大城市的闹市区开区开车困难多少。 可兑换现金手机捕鱼

el Survive a Theory of Eveing 时间旅行在万有理论下理论下可行吗?Tom Sie Siegfried 汤姆·西格弗里德In many many univses, typicallally those onV shows orin movies, me travel is not much moore difficultt than driving downtown in ny major ci during rush hoour.In real ll life, time travel isn't easy. In act, it's probrobably impssible, a fantasy more farfetched than vi visiting Al's Wonderlannd, findingld at the enend of a rainboainbow or clecleansing all all the hate peech off of FFacebook.Yime travel dodoes not nessarily violatate the la of physics. InIn Einstein's  theory of gvity — genral relativvity — space ae and timere merged apacetime,  allows for th the possibity of pathway that could bennd back topast and l back to the uture. Such hs are known  as closed timelike curves.NNobody thinksthat general lativity's ttime loops  would be pracractical for tiime travel evenn if they arare possible. F. For one thingthing, theht exist only  under certaiain circumstancances — the iverse wouldd have to be ro rotating,  not expandiding — as the mathematician Kurt G deel showed in the 1940sBut the univeiverse is ending, and prorobably isnt rotatingo that damthe prospectts for revisitisiting the Stone Age or aor acquirinng a pet dinoosaur.Besies, even if suc such pathwayays did ext, buildingship to travese them wocost more th all the DeLoreeans (and all other traortation vehiehicles) ever made. It wwould need a crcruising speof 140,000 mis per seconnd with nolace to stop fofor gas (or hatever), thefuel tank  have to be morore than arillion times es the size of of an oil tanker.So for pr practical pururposes, time travel'sime has not yt yet arrived. But even if it it's possible only in pinciple, the pe potential ram ramificatns for the basic physicscs of the univverse mightmake it worth th the time  to investigagate it.A firt step would be to attempt toto figure out exactly whthe relevant laws of pics really areare. Einsts general relivity is great, but itably not  the last rd about the pphysics of th universe. After all, it coexists uly with quantntum mechan, which rules tthe subatomic world and pressumably, sce everythig is made obatomic stuff, the rest ot of the universe as we Whether thequantum–genereral relativy combo truly permitsime travel might depend on hat the ultimae correct ththeory combg the two turnss out to be.Sevveral candidatte theories havhave been deoped for merging general relativity and quantum mechancs into a ununified theoryy. It's anen questionwhether these ese candidates would allollow time avel in somethething like e the way genergeneral relatity does, phihilosopher Christian Wüthrüthrich of thehe University of Geneva notes in a neww paper.It'sssible, he say, that a try that supepersedes generl relativitght still  some way inclinclude the equ equivalent  general relatelativity's  timelike loops.Even if timime loops t in the fundamental theor though, te's still n guarantee tat they woulduld be preserved in the emrgent large-scscale spacetime that woululd be relevant in real life. For that atter, Wüthrichrich pointst, predictining the exice of time  travel loops might be takenen as evidencnce against tt the theor, considerng the serous likelihood that timime travel r really isn possible at al all.In any case, investigaating whetheruantum graity theories rretain generl relativiy's time travvel loophoan illuminae many tough questions that  must be aed to develop lop a succssful theory and understtand how it  relates to geneneral relaty. “For tis reason aloalone,” Wüthrich writes, “the questioon of time el beyond geral relativitis worth or while.”在许多宇宙,多宇宙,通常是影视剧中的的宇宙,时间旅行并不比高峰时段在任何一个大城市的闹市区开区开车困难多少。 el Survive a Theory of Eveing 时间旅行在万有理论下理论下可行吗?Tom Sie Siegfried 汤姆·西格弗里德In many many univses, typicallally those onV shows orin movies, me travel is not much moore difficultt than driving downtown in ny major ci during rush hoour.In real ll life, time travel isn't easy. In act, it's probrobably impssible, a fantasy more farfetched than vi visiting Al's Wonderlannd, findingld at the enend of a rainboainbow or clecleansing all all the hate peech off of FFacebook.Yime travel dodoes not nessarily violatate the la of physics. InIn Einstein's  theory of gvity — genral relativvity — space ae and timere merged apacetime,  allows for th the possibity of pathway that could bennd back topast and l back to the uture. Such hs are known  as closed timelike curves.NNobody thinksthat general lativity's ttime loops  would be pracractical for tiime travel evenn if they arare possible. F. For one thingthing, theht exist only  under certaiain circumstancances — the iverse wouldd have to be ro rotating,  not expandiding — as the mathematician Kurt G deel showed in the 1940sBut the univeiverse is ending, and prorobably isnt rotatingo that damthe prospectts for revisitisiting the Stone Age or aor acquirinng a pet dinoosaur.Besies, even if suc such pathwayays did ext, buildingship to travese them wocost more th all the DeLoreeans (and all other traortation vehiehicles) ever made. It wwould need a crcruising speof 140,000 mis per seconnd with nolace to stop fofor gas (or hatever), thefuel tank  have to be morore than arillion times es the size of of an oil tanker.So for pr practical pururposes, time travel'sime has not yt yet arrived. But even if it it's possible only in pinciple, the pe potential ram ramificatns for the basic physicscs of the univverse mightmake it worth th the time  to investigagate it.A firt step would be to attempt toto figure out exactly whthe relevant laws of pics really areare. Einsts general relivity is great, but itably not  the last rd about the pphysics of th universe. After all, it coexists uly with quantntum mechan, which rules tthe subatomic world and pressumably, sce everythig is made obatomic stuff, the rest ot of the universe as we Whether thequantum–genereral relativy combo truly permitsime travel might depend on hat the ultimae correct ththeory combg the two turnss out to be.Sevveral candidatte theories havhave been deoped for merging general relativity and quantum mechancs into a ununified theoryy. It's anen questionwhether these ese candidates would allollow time avel in somethething like e the way genergeneral relatity does, phihilosopher Christian Wüthrüthrich of thehe University of Geneva notes in a neww paper.It'sssible, he say, that a try that supepersedes generl relativitght still  some way inclinclude the equ equivalent  general relatelativity's  timelike loops.Even if timime loops t in the fundamental theor though, te's still n guarantee tat they woulduld be preserved in the emrgent large-scscale spacetime that woululd be relevant in real life. For that atter, Wüthrichrich pointst, predictining the exice of time  travel loops might be takenen as evidencnce against tt the theor, considerng the serous likelihood that timime travel r really isn possible at al all.In any case, investigaating whetheruantum graity theories rretain generl relativiy's time travvel loophoan illuminae many tough questions that  must be aed to develop lop a succssful theory and understtand how it  relates to geneneral relaty. “For tis reason aloalone,” Wüthrich writes, “the questioon of time el beyond geral relativitis worth or while.”在许多宇宙,多宇宙,通常是影视剧中的的宇宙,时间旅行并不比高峰时段在任何一个大城市的闹市区开区开车困难多少。 可兑换现金手机捕鱼el Survive a Theory of Eveing 时间旅行在万有理论下理论下可行吗?Tom Sie Siegfried 汤姆·西格弗里德In many many univses, typicallally those onV shows orin movies, me travel is not much moore difficultt than driving downtown in ny major ci during rush hoour.In real ll life, time travel isn't easy. In act, it's probrobably impssible, a fantasy more farfetched than vi visiting Al's Wonderlannd, findingld at the enend of a rainboainbow or clecleansing all all the hate peech off of FFacebook.Yime travel dodoes not nessarily violatate the la of physics. InIn Einstein's  theory of gvity — genral relativvity — space ae and timere merged apacetime,  allows for th the possibity of pathway that could bennd back topast and l back to the uture. Such hs are known  as closed timelike curves.NNobody thinksthat general lativity's ttime loops  would be pracractical for tiime travel evenn if they arare possible. F. For one thingthing, theht exist only  under certaiain circumstancances — the iverse wouldd have to be ro rotating,  not expandiding — as the mathematician Kurt G deel showed in the 1940sBut the univeiverse is ending, and prorobably isnt rotatingo that damthe prospectts for revisitisiting the Stone Age or aor acquirinng a pet dinoosaur.Besies, even if suc such pathwayays did ext, buildingship to travese them wocost more th all the DeLoreeans (and all other traortation vehiehicles) ever made. It wwould need a crcruising speof 140,000 mis per seconnd with nolace to stop fofor gas (or hatever), thefuel tank  have to be morore than arillion times es the size of of an oil tanker.So for pr practical pururposes, time travel'sime has not yt yet arrived. But even if it it's possible only in pinciple, the pe potential ram ramificatns for the basic physicscs of the univverse mightmake it worth th the time  to investigagate it.A firt step would be to attempt toto figure out exactly whthe relevant laws of pics really areare. Einsts general relivity is great, but itably not  the last rd about the pphysics of th universe. After all, it coexists uly with quantntum mechan, which rules tthe subatomic world and pressumably, sce everythig is made obatomic stuff, the rest ot of the universe as we Whether thequantum–genereral relativy combo truly permitsime travel might depend on hat the ultimae correct ththeory combg the two turnss out to be.Sevveral candidatte theories havhave been deoped for merging general relativity and quantum mechancs into a ununified theoryy. It's anen questionwhether these ese candidates would allollow time avel in somethething like e the way genergeneral relatity does, phihilosopher Christian Wüthrüthrich of thehe University of Geneva notes in a neww paper.It'sssible, he say, that a try that supepersedes generl relativitght still  some way inclinclude the equ equivalent  general relatelativity's  timelike loops.Even if timime loops t in the fundamental theor though, te's still n guarantee tat they woulduld be preserved in the emrgent large-scscale spacetime that woululd be relevant in real life. For that atter, Wüthrichrich pointst, predictining the exice of time  travel loops might be takenen as evidencnce against tt the theor, considerng the serous likelihood that timime travel r really isn possible at al all.In any case, investigaating whetheruantum graity theories rretain generl relativiy's time travvel loophoan illuminae many tough questions that  must be aed to develop lop a succssful theory and understtand how it  relates to geneneral relaty. “For tis reason aloalone,” Wüthrich writes, “the questioon of time el beyond geral relativitis worth or while.”在许多宇宙,多宇宙,通常是影视剧中的的宇宙,时间旅行并不比高峰时段在任何一个大城市的闹市区开区开车困难多少。

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