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- W2593003957 abstract "The decoherence of a two-state tunneling molecule, such as a chiral molecule or ammonia, due to collisions with a buffer gas is analyzed in terms of a succession of quantum states of the molecule satisfying the conditions for a consistent family of histories. With $ensuremath{hbar}ensuremath{omega}$ the separation in energy of the levels in the isolated molecule and $ensuremath{gamma}$ a decoherence rate proportional to the rate of collisions, we find for $ensuremath{gamma}ensuremath{gg}ensuremath{omega}$ (strong decoherence) a consistent family in which the molecule flips randomly back and forth between the left- and right-handed chiral states in a stationary Markov process. For $ensuremath{gamma}<ensuremath{omega}$ there is a family in which the molecule oscillates continuously between the different chiral states, but with occasional random changes of phase, at a frequency that goes to zero at a phase transition $ensuremath{gamma}=ensuremath{omega}$. This transition is similar to the behavior of the inversion frequency of ammonia with increasing pressure, but will be difficult to observe in chiral molecules such as D${}_{2}$S${}_{2}$. There are additional consistent families both for $ensuremath{gamma}>ensuremath{omega}$ and for $ensuremath{gamma}<ensuremath{omega}$. In addition, we relate the speed with which chiral information is transferred to the environment to the rate of decrease of complementary types of information (e.g., parity information) remaining in the molecule itself." @default.
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- W2593003957 date "2012-10-11" @default.
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- W2593003957 title "Consistent histories for tunneling molecules subject to collisional decoherence" @default.
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- W2593003957 doi "https://doi.org/10.1103/physreva.86.042111" @default.
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