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Title: Superposition induced topology changes in quantum gravity

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [1]
  1. Univ. of California, Santa Barbara, CA (United States). Physics Dept.

We show that superpositions of classical states in quantum gravity with fixed topology can lead to new classical states with a different topology. We study this phenomenon in a particular limit of the LLM geometries. In this limit, the UV complete minisuperspace of allowed quantum states is exactly given by the Hilbert space of a free chiral boson in two dimensions. We construct this chiral boson purely in terms of combinatorial objects associated with the permutation group. As a byproduct of this analysis, we rederive the Murnaghan-Nakayama rule for characters of the permutation group. We are able to express this rule in terms of operator relations for raising and lowering operators on the Hilbert space of states in a free fermion basis. Our construction provides a preferred notion of bulk locality by studying an appropriate notion of D-brane state generating functions. We describe how multi-droplet LLM geometries with different topologies give new classical limits of the free chiral boson, even though they can be written as superpositions of coherent states with trivial topology. As a consequence, topology cannot be accessed by a single operator measurement in this quantum system. In conclusion, we study other non-linear measurements in the quantum wave-function, based on uncertainty and entanglement between modes of the chiral boson, that can be used as order parameters to measure the topology of such states.

Research Organization:
Univ. of California, Santa Barbara, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
SC0011702
OSTI ID:
1499190
Journal Information:
Journal of High Energy Physics (Online), Vol. 2017, Issue 11; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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Cited By (9)

Exciting LLM geometries journal July 2018
Emergent classical spacetime from microstates of an incipient black hole text January 2018
Exciting LLM Geometries text January 2018
Emergent classical spacetime from microstates of an incipient black hole journal January 2019
Code subspaces for LLM geometries journal February 2018
Submatrix deconfinement and small black holes in AdS text January 2018
Code subspaces for LLM geometries text January 2017
Quantum information processing and composite quantum fields journal January 2019
Semiclassical SL(2) Strings on LLM backgrounds text January 2018

Figures / Tables (9)


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