Information flow of quantum states interacting with closed timelike curves
نویسندگان
چکیده
منابع مشابه
Quantum coherence and closed timelike curves.
Various calculations of the S matrix have shown that it seems to be non unitary for interacting fields when there are closed timelike curves. It is argued that this is because there is loss of quantum coherence caused by the fact that part of the quantum state circulates on the closed timelike curves and is not measured at infinity. A prescription is given for calculating the superscattering ma...
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Einstein’s field equations of gravitation are known to admit closed timelike curve (CTC) solutions. Deutsch approached the problem from the quantum information point of view and proposed a selfconsistency condition. In this work, the Deutsch equation is formulated as an eigenvalue problem. The disappearance of entanglement between two qubits in an Einstein-Podolsky-Rosen (EPR) state near a CTC ...
متن کاملPath integrals, density matrices, and information flow with closed timelike curves.
Two formulations of quantum mechanics, inequivalent in the presence of closed timelike curves, are studied in the context of a soluable system. It illustrates how quantum field nonlinearities lead to a breakdown of unitarity, causality, and superpo-sition using a path integral. Deutsch's density matrix approach is causal but typically destroys coherence. For each of these formulations I demonst...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2010
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.82.062330