The quantum nature of time
Time reversal invariance (T) refers to the symmetry between the past and future. All physical processes obey this invariance. The one exception is the weak force in the decay of K and B mesons. The violation of T symmetry in these systems signifies a fundamental asymmetry between the past and future. I have recently shown that processes which violate T symmetry induce destructive interference between different paths that the universe can take through time. This work resolves the long-standing problem of modeling the dynamics of T violation processes. It shows that T violation has previously unknown, large-scale physical effects and that these effects underlie the origin of the unidirectionality of time [Found. Phys. 41 1569-1596 (2011) DOI, eprint arxiv:0911.4528, Found. Phys. 45 , 691-706 (2015) DOI, eprint arXiv:1503.06523].
Current work is exploring the implications for the difference between space and time [Proc. R. Soc. Lond. A 472, 20150670 (2016) DOI , Book chapter DOI].
An overview of the theory and the implications it has for human experience is given in:
"The quantum theory of time, the block universe, and human experience", Phil. Trans. R. Soc. A.376, 20170316 (2018) DOI.
New Scientist briefly mentioned my quantum theory of time in the article "One time or another: Our best 5 theories of the fourth dimension" by Anil Ananthaswamy, 1 February 2017.
Landauer argued that information is physical because the process of erasing the information stored in a memory device incurs an energy cost in the form of a minimum amount of mechanical work. We have recently found, however, that this energy cost can be reduced to zero by paying a cost in angular momentum or another conserved quantity. Erasing the memory of Maxwell's demon in this way implies that work can be extracted from a single thermal reservoir at a cost of angular momentum and an increase in total entropy. The new erasure mechanism calls for a fundamental restatement of the Second Law of thermodynamics [Proc. R. Soc. A 467, 1770-1778 (2011), eprint arXiv:1004.5330 , Entropy 15, 4956-4968 (2013) ]. It also imposes new restrictions for perpetual machines of the second kind. We have examined the nature of the discrete fluctuations in the cost of erasing information using spin angular momentum [Phys. Rev. Lett. 118, 060602 (2017)]. We are currently exploring experimental implementations of the erasure protocol.
Further information: see the Centre for Quantum Dynamics entry on Quantum Thermodynamics.
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