# The Universe as a Quantum Encoder

@inproceedings{Cotler2022TheUA, title={The Universe as a Quantum Encoder}, author={Jordan S. Cotler and Andrew Strominger}, year={2022} }

Quantum mechanical unitarity in our universe is challenged both by the notion of the big bang, in which nothing transforms into something, and the expansion of space, in which something transforms into more something. This motivates the hypothesis that quantum mechanical time evolution is always isometric, in the sense of preserving inner products, but not necessarily unitary. As evidence for this hypothesis we show that in two spacetime dimensions (i) there is net entanglement entropy produced…

## 7 Citations

### Emergent metric space-time from matrix theory

- PhysicsJournal of High Energy Physics
- 2022

Abstract
The IKKT matrix model yields an emergent space-time. We further develop these ideas and give a proposal for an emergent metric. Based on previous numerical studies of this model, we provide…

### EPR and Linear GUP

- Physics
- 2022

Einstein, Podolsky, and Rosen found that the non-simultaneous reality of position and momentum implies that we cannot consider quantum mechanics a complete theory of physical reality. We show that…

### EPR and Linear GUP: Completeness

- Physics
- 2022

Einstein, Podolsky, and Rosen (EPR) found that the non-simultaneous reality of position and momentum implies that we cannot consider quantum mechanics a complete theory of physical reality. We show…

### Holographic local operator quenches in BCFTs

- PhysicsJournal of High Energy Physics
- 2022

We present a gravity dual of local operator quench in a two-dimensional CFT with conformal boundaries. This is given by a massive excitation in a three-dimensional AdS space with the end of the world…

### Hyperbolic Lattice for Scalar Field Theory in AdS$_3$

- Physics
- 2022

: We construct a tessellation of AdS 3 , by extending the equilateral triangulation of AdS 2 on the Poincar´e disk based on the (2 , 3 , 7) triangle group, suitable for studying strongly coupled…

### A proposal for solving the cosmological constant problem

- Physics
- 2022

Recently, we used a reinterpretation of the generalized uncertainty principle as an eﬀective variation of the Planck constant (Phys. Lett. B 831 (2022) 137182). In this letter, we show that the…

### Unitarity problems for an effective field theory description of early universe cosmology

- PhysicsThe European Physical Journal C
- 2022

In the context of Effective Field Theory, the Hilbert space of states increases in an expanding universe. Hence, the time evolution cannot be unitary. The formation of structure is usually studied…

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