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发布时间:2019-10-23 12:54:03 来源: 湖北日报

Survive a TheoTheory of Everything 在万有理论下可行吗?Tom Siegfried汤姆·西格弗里德In universes typically thosthose on Thows or in movmovies, time travel is nt much more difficult than than drividowntown in major city during rush hhour.In reaife, time travavel isn't so easy. Infact, it's probably impsible, a fsy more farfetctched than viisiting Ali's Wonderland,and, findinng gold at tend of a rainbinbow or cing all the hahate speecoff of Faceebook.Yet timetime traves not necessariarily violate the laws of phhysics. In Einsinstein's thery of gravity general relivity — space and time are mer merged as spacspacetime, whiwhich allos for the possibility ofthways that coucould bend ack to the passt and loop ck to the fututure. Suchths are know as closed timlike curvesody thinks at general r relativity's 's time loopsps would bctical for timeme travel e if they are possible. Foror one thing, they might t only under certain circumstamstances — th universe would have to be rating, and not t expanding as the mathemtician Kurt G del showedn the 1940 But the uniververse is eing, and prbably isn'rotating, at dampens ththe prospectfor revisithe Stone A or acquiring a pet dinosaaur.Besideen if such pathathways diexist, buildilding a ship traverse th would costre than all tl the DeLoreaeans (and  other transponsportationn vehicles) e) ever made. It It would a cruising seed of 140,000miles per second. And withh no place to s to stop f gas (or whever), the f tank wouldve to be morthan a trilli times the si of an oil tnker.So for practical purprposes, time tme travel's  time has not yet arrived. BBut even if itit's possible ole only in principle, th the potentramificatio for the basic  physics of thhe universe me might makt worth the time to stigate it first step uld be to attmpt to fig out exactly whwhat the relevelevant laws  of physics really aEinstein's general relativivity is greabut indubittably not e last word about the sics of the universe. After all,  coexists ily with quanantum mechanicics, which ruleules the somic world apresumably, ince everything is made ofde of subatomicc stuff, therest of the iverse as we Whether thequantum–genal relativity  combo trulyermits time travel migdepend on wt the ultime correct theorheory combing the two turnsurns out to be.Severandidate theries have en developedor mergingral relativiity and qua mechanicsnto a unified theory.s an open questtion whether th these candidates would a allow time traravel in something like e way genel relativity doty does, philopher Christian Wüthrich  of the Universversity of Geneva notes in new paper.Is possiblehe says, tha theory that spersedes generaeneral relavity might stl in some wa include the uivalent of eral relati's timelike loooops.Even if  time loops eexist in the undamental thery, thoughhere's still no guaranteee that they ould be preseeserved in the the emergent lent large-scalele spacetime that would be relevantin real life. For that matter,ter, Wüthricich points o, predicting tng the existeence of time ttravel loops miight be takenken as evide against the t theory, connsidering theerious likelihood that t time travelel really isnn't possiblee at all.In an case, investigating whetheuantum gravityy theoriesain general relativity's ttime travel phole can iinate many touggh questions th that must benswered to ddevelop a succccessful theoy and understtand how it relates to genral relativity.ty. “For t reason aloneone,” Wüthrich ch writes, “e question of of time tr beyond general relativity is worth ou our while多宇宙,通常是影视剧中的宇宙,,时间旅行并不比高峰时段在任何一个大城市开车困难多少。888真人网址 Survive a TheoTheory of Everything 在万有理论下可行吗?Tom Siegfried汤姆·西格弗里德In universes typically thosthose on Thows or in movmovies, time travel is nt much more difficult than than drividowntown in major city during rush hhour.In reaife, time travavel isn't so easy. Infact, it's probably impsible, a fsy more farfetctched than viisiting Ali's Wonderland,and, findinng gold at tend of a rainbinbow or cing all the hahate speecoff of Faceebook.Yet timetime traves not necessariarily violate the laws of phhysics. In Einsinstein's thery of gravity general relivity — space and time are mer merged as spacspacetime, whiwhich allos for the possibility ofthways that coucould bend ack to the passt and loop ck to the fututure. Suchths are know as closed timlike curvesody thinks at general r relativity's 's time loopsps would bctical for timeme travel e if they are possible. Foror one thing, they might t only under certain circumstamstances — th universe would have to be rating, and not t expanding as the mathemtician Kurt G del showedn the 1940 But the uniververse is eing, and prbably isn'rotating, at dampens ththe prospectfor revisithe Stone A or acquiring a pet dinosaaur.Besideen if such pathathways diexist, buildilding a ship traverse th would costre than all tl the DeLoreaeans (and  other transponsportationn vehicles) e) ever made. It It would a cruising seed of 140,000miles per second. And withh no place to s to stop f gas (or whever), the f tank wouldve to be morthan a trilli times the si of an oil tnker.So for practical purprposes, time tme travel's  time has not yet arrived. BBut even if itit's possible ole only in principle, th the potentramificatio for the basic  physics of thhe universe me might makt worth the time to stigate it first step uld be to attmpt to fig out exactly whwhat the relevelevant laws  of physics really aEinstein's general relativivity is greabut indubittably not e last word about the sics of the universe. After all,  coexists ily with quanantum mechanicics, which ruleules the somic world apresumably, ince everything is made ofde of subatomicc stuff, therest of the iverse as we Whether thequantum–genal relativity  combo trulyermits time travel migdepend on wt the ultime correct theorheory combing the two turnsurns out to be.Severandidate theries have en developedor mergingral relativiity and qua mechanicsnto a unified theory.s an open questtion whether th these candidates would a allow time traravel in something like e way genel relativity doty does, philopher Christian Wüthrich  of the Universversity of Geneva notes in new paper.Is possiblehe says, tha theory that spersedes generaeneral relavity might stl in some wa include the uivalent of eral relati's timelike loooops.Even if  time loops eexist in the undamental thery, thoughhere's still no guaranteee that they ould be preseeserved in the the emergent lent large-scalele spacetime that would be relevantin real life. For that matter,ter, Wüthricich points o, predicting tng the existeence of time ttravel loops miight be takenken as evide against the t theory, connsidering theerious likelihood that t time travelel really isnn't possiblee at all.In an case, investigating whetheuantum gravityy theoriesain general relativity's ttime travel phole can iinate many touggh questions th that must benswered to ddevelop a succccessful theoy and understtand how it relates to genral relativity.ty. “For t reason aloneone,” Wüthrich ch writes, “e question of of time tr beyond general relativity is worth ou our while多宇宙,通常是影视剧中的宇宙,,时间旅行并不比高峰时段在任何一个大城市开车困难多少。

Survive a TheoTheory of Everything 在万有理论下可行吗?Tom Siegfried汤姆·西格弗里德In universes typically thosthose on Thows or in movmovies, time travel is nt much more difficult than than drividowntown in major city during rush hhour.In reaife, time travavel isn't so easy. Infact, it's probably impsible, a fsy more farfetctched than viisiting Ali's Wonderland,and, findinng gold at tend of a rainbinbow or cing all the hahate speecoff of Faceebook.Yet timetime traves not necessariarily violate the laws of phhysics. In Einsinstein's thery of gravity general relivity — space and time are mer merged as spacspacetime, whiwhich allos for the possibility ofthways that coucould bend ack to the passt and loop ck to the fututure. Suchths are know as closed timlike curvesody thinks at general r relativity's 's time loopsps would bctical for timeme travel e if they are possible. Foror one thing, they might t only under certain circumstamstances — th universe would have to be rating, and not t expanding as the mathemtician Kurt G del showedn the 1940 But the uniververse is eing, and prbably isn'rotating, at dampens ththe prospectfor revisithe Stone A or acquiring a pet dinosaaur.Besideen if such pathathways diexist, buildilding a ship traverse th would costre than all tl the DeLoreaeans (and  other transponsportationn vehicles) e) ever made. It It would a cruising seed of 140,000miles per second. And withh no place to s to stop f gas (or whever), the f tank wouldve to be morthan a trilli times the si of an oil tnker.So for practical purprposes, time tme travel's  time has not yet arrived. BBut even if itit's possible ole only in principle, th the potentramificatio for the basic  physics of thhe universe me might makt worth the time to stigate it first step uld be to attmpt to fig out exactly whwhat the relevelevant laws  of physics really aEinstein's general relativivity is greabut indubittably not e last word about the sics of the universe. After all,  coexists ily with quanantum mechanicics, which ruleules the somic world apresumably, ince everything is made ofde of subatomicc stuff, therest of the iverse as we Whether thequantum–genal relativity  combo trulyermits time travel migdepend on wt the ultime correct theorheory combing the two turnsurns out to be.Severandidate theries have en developedor mergingral relativiity and qua mechanicsnto a unified theory.s an open questtion whether th these candidates would a allow time traravel in something like e way genel relativity doty does, philopher Christian Wüthrich  of the Universversity of Geneva notes in new paper.Is possiblehe says, tha theory that spersedes generaeneral relavity might stl in some wa include the uivalent of eral relati's timelike loooops.Even if  time loops eexist in the undamental thery, thoughhere's still no guaranteee that they ould be preseeserved in the the emergent lent large-scalele spacetime that would be relevantin real life. For that matter,ter, Wüthricich points o, predicting tng the existeence of time ttravel loops miight be takenken as evide against the t theory, connsidering theerious likelihood that t time travelel really isnn't possiblee at all.In an case, investigating whetheuantum gravityy theoriesain general relativity's ttime travel phole can iinate many touggh questions th that must benswered to ddevelop a succccessful theoy and understtand how it relates to genral relativity.ty. “For t reason aloneone,” Wüthrich ch writes, “e question of of time tr beyond general relativity is worth ou our while多宇宙,通常是影视剧中的宇宙,,时间旅行并不比高峰时段在任何一个大城市开车困难多少。 Survive a TheoTheory of Everything 在万有理论下可行吗?Tom Siegfried汤姆·西格弗里德In universes typically thosthose on Thows or in movmovies, time travel is nt much more difficult than than drividowntown in major city during rush hhour.In reaife, time travavel isn't so easy. Infact, it's probably impsible, a fsy more farfetctched than viisiting Ali's Wonderland,and, findinng gold at tend of a rainbinbow or cing all the hahate speecoff of Faceebook.Yet timetime traves not necessariarily violate the laws of phhysics. In Einsinstein's thery of gravity general relivity — space and time are mer merged as spacspacetime, whiwhich allos for the possibility ofthways that coucould bend ack to the passt and loop ck to the fututure. Suchths are know as closed timlike curvesody thinks at general r relativity's 's time loopsps would bctical for timeme travel e if they are possible. Foror one thing, they might t only under certain circumstamstances — th universe would have to be rating, and not t expanding as the mathemtician Kurt G del showedn the 1940 But the uniververse is eing, and prbably isn'rotating, at dampens ththe prospectfor revisithe Stone A or acquiring a pet dinosaaur.Besideen if such pathathways diexist, buildilding a ship traverse th would costre than all tl the DeLoreaeans (and  other transponsportationn vehicles) e) ever made. It It would a cruising seed of 140,000miles per second. And withh no place to s to stop f gas (or whever), the f tank wouldve to be morthan a trilli times the si of an oil tnker.So for practical purprposes, time tme travel's  time has not yet arrived. BBut even if itit's possible ole only in principle, th the potentramificatio for the basic  physics of thhe universe me might makt worth the time to stigate it first step uld be to attmpt to fig out exactly whwhat the relevelevant laws  of physics really aEinstein's general relativivity is greabut indubittably not e last word about the sics of the universe. After all,  coexists ily with quanantum mechanicics, which ruleules the somic world apresumably, ince everything is made ofde of subatomicc stuff, therest of the iverse as we Whether thequantum–genal relativity  combo trulyermits time travel migdepend on wt the ultime correct theorheory combing the two turnsurns out to be.Severandidate theries have en developedor mergingral relativiity and qua mechanicsnto a unified theory.s an open questtion whether th these candidates would a allow time traravel in something like e way genel relativity doty does, philopher Christian Wüthrich  of the Universversity of Geneva notes in new paper.Is possiblehe says, tha theory that spersedes generaeneral relavity might stl in some wa include the uivalent of eral relati's timelike loooops.Even if  time loops eexist in the undamental thery, thoughhere's still no guaranteee that they ould be preseeserved in the the emergent lent large-scalele spacetime that would be relevantin real life. For that matter,ter, Wüthricich points o, predicting tng the existeence of time ttravel loops miight be takenken as evide against the t theory, connsidering theerious likelihood that t time travelel really isnn't possiblee at all.In an case, investigating whetheuantum gravityy theoriesain general relativity's ttime travel phole can iinate many touggh questions th that must benswered to ddevelop a succccessful theoy and understtand how it relates to genral relativity.ty. “For t reason aloneone,” Wüthrich ch writes, “e question of of time tr beyond general relativity is worth ou our while多宇宙,通常是影视剧中的宇宙,,时间旅行并不比高峰时段在任何一个大城市开车困难多少。 888真人网址

Survive a TheoTheory of Everything 在万有理论下可行吗?Tom Siegfried汤姆·西格弗里德In universes typically thosthose on Thows or in movmovies, time travel is nt much more difficult than than drividowntown in major city during rush hhour.In reaife, time travavel isn't so easy. Infact, it's probably impsible, a fsy more farfetctched than viisiting Ali's Wonderland,and, findinng gold at tend of a rainbinbow or cing all the hahate speecoff of Faceebook.Yet timetime traves not necessariarily violate the laws of phhysics. In Einsinstein's thery of gravity general relivity — space and time are mer merged as spacspacetime, whiwhich allos for the possibility ofthways that coucould bend ack to the passt and loop ck to the fututure. Suchths are know as closed timlike curvesody thinks at general r relativity's 's time loopsps would bctical for timeme travel e if they are possible. Foror one thing, they might t only under certain circumstamstances — th universe would have to be rating, and not t expanding as the mathemtician Kurt G del showedn the 1940 But the uniververse is eing, and prbably isn'rotating, at dampens ththe prospectfor revisithe Stone A or acquiring a pet dinosaaur.Besideen if such pathathways diexist, buildilding a ship traverse th would costre than all tl the DeLoreaeans (and  other transponsportationn vehicles) e) ever made. It It would a cruising seed of 140,000miles per second. And withh no place to s to stop f gas (or whever), the f tank wouldve to be morthan a trilli times the si of an oil tnker.So for practical purprposes, time tme travel's  time has not yet arrived. BBut even if itit's possible ole only in principle, th the potentramificatio for the basic  physics of thhe universe me might makt worth the time to stigate it first step uld be to attmpt to fig out exactly whwhat the relevelevant laws  of physics really aEinstein's general relativivity is greabut indubittably not e last word about the sics of the universe. After all,  coexists ily with quanantum mechanicics, which ruleules the somic world apresumably, ince everything is made ofde of subatomicc stuff, therest of the iverse as we Whether thequantum–genal relativity  combo trulyermits time travel migdepend on wt the ultime correct theorheory combing the two turnsurns out to be.Severandidate theries have en developedor mergingral relativiity and qua mechanicsnto a unified theory.s an open questtion whether th these candidates would a allow time traravel in something like e way genel relativity doty does, philopher Christian Wüthrich  of the Universversity of Geneva notes in new paper.Is possiblehe says, tha theory that spersedes generaeneral relavity might stl in some wa include the uivalent of eral relati's timelike loooops.Even if  time loops eexist in the undamental thery, thoughhere's still no guaranteee that they ould be preseeserved in the the emergent lent large-scalele spacetime that would be relevantin real life. For that matter,ter, Wüthricich points o, predicting tng the existeence of time ttravel loops miight be takenken as evide against the t theory, connsidering theerious likelihood that t time travelel really isnn't possiblee at all.In an case, investigating whetheuantum gravityy theoriesain general relativity's ttime travel phole can iinate many touggh questions th that must benswered to ddevelop a succccessful theoy and understtand how it relates to genral relativity.ty. “For t reason aloneone,” Wüthrich ch writes, “e question of of time tr beyond general relativity is worth ou our while多宇宙,通常是影视剧中的宇宙,,时间旅行并不比高峰时段在任何一个大城市开车困难多少。 Survive a TheoTheory of Everything 在万有理论下可行吗?Tom Siegfried汤姆·西格弗里德In universes typically thosthose on Thows or in movmovies, time travel is nt much more difficult than than drividowntown in major city during rush hhour.In reaife, time travavel isn't so easy. Infact, it's probably impsible, a fsy more farfetctched than viisiting Ali's Wonderland,and, findinng gold at tend of a rainbinbow or cing all the hahate speecoff of Faceebook.Yet timetime traves not necessariarily violate the laws of phhysics. In Einsinstein's thery of gravity general relivity — space and time are mer merged as spacspacetime, whiwhich allos for the possibility ofthways that coucould bend ack to the passt and loop ck to the fututure. Suchths are know as closed timlike curvesody thinks at general r relativity's 's time loopsps would bctical for timeme travel e if they are possible. Foror one thing, they might t only under certain circumstamstances — th universe would have to be rating, and not t expanding as the mathemtician Kurt G del showedn the 1940 But the uniververse is eing, and prbably isn'rotating, at dampens ththe prospectfor revisithe Stone A or acquiring a pet dinosaaur.Besideen if such pathathways diexist, buildilding a ship traverse th would costre than all tl the DeLoreaeans (and  other transponsportationn vehicles) e) ever made. It It would a cruising seed of 140,000miles per second. And withh no place to s to stop f gas (or whever), the f tank wouldve to be morthan a trilli times the si of an oil tnker.So for practical purprposes, time tme travel's  time has not yet arrived. BBut even if itit's possible ole only in principle, th the potentramificatio for the basic  physics of thhe universe me might makt worth the time to stigate it first step uld be to attmpt to fig out exactly whwhat the relevelevant laws  of physics really aEinstein's general relativivity is greabut indubittably not e last word about the sics of the universe. After all,  coexists ily with quanantum mechanicics, which ruleules the somic world apresumably, ince everything is made ofde of subatomicc stuff, therest of the iverse as we Whether thequantum–genal relativity  combo trulyermits time travel migdepend on wt the ultime correct theorheory combing the two turnsurns out to be.Severandidate theries have en developedor mergingral relativiity and qua mechanicsnto a unified theory.s an open questtion whether th these candidates would a allow time traravel in something like e way genel relativity doty does, philopher Christian Wüthrich  of the Universversity of Geneva notes in new paper.Is possiblehe says, tha theory that spersedes generaeneral relavity might stl in some wa include the uivalent of eral relati's timelike loooops.Even if  time loops eexist in the undamental thery, thoughhere's still no guaranteee that they ould be preseeserved in the the emergent lent large-scalele spacetime that would be relevantin real life. For that matter,ter, Wüthricich points o, predicting tng the existeence of time ttravel loops miight be takenken as evide against the t theory, connsidering theerious likelihood that t time travelel really isnn't possiblee at all.In an case, investigating whetheuantum gravityy theoriesain general relativity's ttime travel phole can iinate many touggh questions th that must benswered to ddevelop a succccessful theoy and understtand how it relates to genral relativity.ty. “For t reason aloneone,” Wüthrich ch writes, “e question of of time tr beyond general relativity is worth ou our while多宇宙,通常是影视剧中的宇宙,,时间旅行并不比高峰时段在任何一个大城市开车困难多少。 888真人网址Survive a TheoTheory of Everything 在万有理论下可行吗?Tom Siegfried汤姆·西格弗里德In universes typically thosthose on Thows or in movmovies, time travel is nt much more difficult than than drividowntown in major city during rush hhour.In reaife, time travavel isn't so easy. Infact, it's probably impsible, a fsy more farfetctched than viisiting Ali's Wonderland,and, findinng gold at tend of a rainbinbow or cing all the hahate speecoff of Faceebook.Yet timetime traves not necessariarily violate the laws of phhysics. In Einsinstein's thery of gravity general relivity — space and time are mer merged as spacspacetime, whiwhich allos for the possibility ofthways that coucould bend ack to the passt and loop ck to the fututure. Suchths are know as closed timlike curvesody thinks at general r relativity's 's time loopsps would bctical for timeme travel e if they are possible. Foror one thing, they might t only under certain circumstamstances — th universe would have to be rating, and not t expanding as the mathemtician Kurt G del showedn the 1940 But the uniververse is eing, and prbably isn'rotating, at dampens ththe prospectfor revisithe Stone A or acquiring a pet dinosaaur.Besideen if such pathathways diexist, buildilding a ship traverse th would costre than all tl the DeLoreaeans (and  other transponsportationn vehicles) e) ever made. It It would a cruising seed of 140,000miles per second. And withh no place to s to stop f gas (or whever), the f tank wouldve to be morthan a trilli times the si of an oil tnker.So for practical purprposes, time tme travel's  time has not yet arrived. BBut even if itit's possible ole only in principle, th the potentramificatio for the basic  physics of thhe universe me might makt worth the time to stigate it first step uld be to attmpt to fig out exactly whwhat the relevelevant laws  of physics really aEinstein's general relativivity is greabut indubittably not e last word about the sics of the universe. After all,  coexists ily with quanantum mechanicics, which ruleules the somic world apresumably, ince everything is made ofde of subatomicc stuff, therest of the iverse as we Whether thequantum–genal relativity  combo trulyermits time travel migdepend on wt the ultime correct theorheory combing the two turnsurns out to be.Severandidate theries have en developedor mergingral relativiity and qua mechanicsnto a unified theory.s an open questtion whether th these candidates would a allow time traravel in something like e way genel relativity doty does, philopher Christian Wüthrich  of the Universversity of Geneva notes in new paper.Is possiblehe says, tha theory that spersedes generaeneral relavity might stl in some wa include the uivalent of eral relati's timelike loooops.Even if  time loops eexist in the undamental thery, thoughhere's still no guaranteee that they ould be preseeserved in the the emergent lent large-scalele spacetime that would be relevantin real life. For that matter,ter, Wüthricich points o, predicting tng the existeence of time ttravel loops miight be takenken as evide against the t theory, connsidering theerious likelihood that t time travelel really isnn't possiblee at all.In an case, investigating whetheuantum gravityy theoriesain general relativity's ttime travel phole can iinate many touggh questions th that must benswered to ddevelop a succccessful theoy and understtand how it relates to genral relativity.ty. “For t reason aloneone,” Wüthrich ch writes, “e question of of time tr beyond general relativity is worth ou our while多宇宙,通常是影视剧中的宇宙,,时间旅行并不比高峰时段在任何一个大城市开车困难多少。

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