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From Timeless Physical Theory to Timelessness; Sam Baron*; samuel.baron@sydney.edu.au; Peter Evans*; peter.evans@sydney.edu.au; Kristie Miller*; kristie_miller@yahoo.com; ABSTRACT; This paper addresses the extent to which both Julian Barbour’s Machian; formulation of general relativity and his interpretation of canonical quantum; gravity can be called timeless. We differentiate two types of timelessness in; Barbour’s (1994a; 1994b and 1999c). We argue that Barbour’s metaphysical; contention that ours is a timeless world is crucially lacking an account of the; essential features of time—an account of what features our world would need to; have if it were to count as being one in which there is time. We attempt to; provide such an account through considerations of both the representation of; time in physical theory and in orthodox metaphysical analyses. We; subsequently argue that Barbour’s claim of timelessness is dubious with; respect to his Machian formulation of general relativity but warranted with; respect to his interpretation of canonical quantum gravity. We conclude by; discussing the extent to which we should be concerned by the implications of; Barbour’s view.
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Humana.Mente - Issue 13 - Paper Baron.Evans.MIller
From Timeless Physical Theory to Timelessness
Sam Baron*
samuel.baron@sydney.edu.au
Peter Evans*
peter.evans@sydney.edu.au
Kristie Miller*
kristie_miller@yahoo.com
ABSTRACT
This paper addresses the extent to which both Julian Barbour’s Machian
formulation of general relativity and his interpretation of canonical quantum
gravity can be called timeless. We differentiate two types of timelessness in
Barbour’s (1994a, 1994b and 1999c). We argue that Barbour’s metaphysical
contention that ours is a timeless world is crucially lacking an account of the
essential features of time—an account of what features our world would need to
have if it were to count as being one in which there is time. We attempt to
provide such an account through considerations of both the representation of
time in physical theory and in orthodox metaphysical analyses. We
subsequently argue that Barbour’s claim of timelessness is dubious with
respect to his Machian formulation of general relativity but warranted with
respect to his interpretation of canonical quantum gravity. We conclude by
discussing the extent to which we should be concerned by the implications of
Barbour’s view.
From Timeless Physical Theory to Timelessness
Sam Baron*
samuel.baron@sydney.edu.au
Peter Evans*
peter.evans@sydney.edu.au
Kristie Miller*
kristie_miller@yahoo.com
ABSTRACT
This paper addresses the extent to which both Julian Barbour’s Machian
formulation of general relativity and his interpretation of canonical quantum
gravity can be called timeless. We differentiate two types of timelessness in
Barbour’s (1994a
1994b and 1999c). We argue that Barbour’s metaphysical
contention that ours is a timeless world is crucially lacking an account of the
essential features of time—an account of what features our world would need to
have if it were to count as being one in which there is time. We attempt to
provide such an account through considerations of both the representation of
time in physical theory and in orthodox metaphysical analyses. We
subsequently argue that Barbour’s claim of timelessness is dubious with
respect to his Machian formulation of general relativity but warranted with
respect to his interpretation of canonical quantum gravity. We conclude by
discussing the extent to which we should be concerned by the implications of
Barbour’s view.
HM
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