# Quantum Theory Looks at Time Travel

@inproceedings{Greenberger2005QuantumTL, title={Quantum Theory Looks at Time Travel}, author={Daniel Mordecai Greenberger and Karl Svozil}, year={2005} }

We introduce a quantum mechanical model of time travel which includes two figurative beam splitters in order to induce feedback to earlier times. This leads to a unique solution to the paradox where one could kill one’s grandfather in that once the future has unfolded, it cannot change the past, and so the past becomes deterministic. On the other hand, looking forwards towards the future is completely probabilistic. This resolves the classical paradox in a philosophically satisfying manner.

#### 18 Citations

Space and Time in a Quantized World

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Comment on 'Quantum Theory Looks at Time Travel' by D.Greenberger & K.Svozil

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It is claimed in the above paper that, if time travel were possible, quantum propagation would prevent classic time travel paradoxes by establishing consistent loops; an example circuit is used to… Expand

Retroactive Event Determination and Its Relativistic Roots

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Quantum Time

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- 2010

Normally we quantize along the space dimensions but treat time classically. But from relativity we expect a high level of symmetry between time and space. What happens if we quantize time using the… Expand

Replicating the benefits of Deutschian closed timelike curves without breaking causality

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Investigation of closed timelike curves showed that despite such restrictions, OTCs allow quantum computers to clone quantum states, defy Heisenberg’s uncertainty principle, and efficiently solve previously intractable mathematical problems. Expand

Information Processing Structure of Quantum Gravity

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- 2014

This work provides a model for the information processing structure of quantum gravity, and shows that the quantum gravity environment is an information resource-pool from which valuable information can be extracted and can be exploited in quantum computations. Expand

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The Main Problems

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Some of the main problems partitioning the whole in four broad subjects are summarized: significance of the quantum formalism, measurement, non–locality and causality, and the possible solutions to these problems will be treated in the next chapters. Expand

Smooth Entropy Transfer of Quantum Gravity Information Processing

- Physics, Computer Science
- ArXiv
- 2014

The term smooth entanglement entropy transfer is introduced, a phenomenon that is a consequence of the causality-cancellation property of the quantum gravity environment, and it is proved that the Cauchy area expansion, along with the dilation of the Rindler horizon area, is a strict corollary of the causation. Expand

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