Quantum causal histories
- 12 May 2000
- journal article
- Published by IOP Publishing in Classical and Quantum Gravity
- Vol. 17 (10) , 2059-2072
- https://doi.org/10.1088/0264-9381/17/10/302
Abstract
Quantum causal histories are defined to be causal sets with Hilbert spaces attached to each event and local unitary evolution operators. The reflexivity, antisymmetry and transitivity properties of a causal set are preserved in the quantum history as conditions on the evolution operators. A quantum causal history in which transitivity holds can be treated as `directed' topological quantum field theory. Two examples of such histories are described.Keywords
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