Are entangled particles connected by wormholes? Evidence for the ER = EPR conjecture from entropy inequalities
If spacetime is built out of quantum bits, does the shape of space depend on how the bits are entangled? The ER = EPR conjecture relates the entanglement entropy of a collection of black holes to the cross sectional area of Einstein-Rosen (ER) bridges (or wormholes) connecting them. We show that the...
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| Format: | Article |
| Idioma: | en_US |
| Publicat: |
American Physical Society
2014
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| Accés en línia: | http://hdl.handle.net/1721.1/88981 https://orcid.org/0000-0003-3932-6174 |
| Sumari: | If spacetime is built out of quantum bits, does the shape of space depend on how the bits are entangled? The ER = EPR conjecture relates the entanglement entropy of a collection of black holes to the cross sectional area of Einstein-Rosen (ER) bridges (or wormholes) connecting them. We show that the geometrical entropy of classical ER bridges satisfies the subadditivity, triangle, strong subadditivity, and Cadney-Linden-Winter inequalities. These are nontrivial properties of entanglement entropy, so this is evidence for ER = EPR. We further show that the entanglement entropy associated with classical ER bridges has nonpositive tripartite information. This is not a property of entanglement entropy, in general. For example, the entangled four qubit pure state |GHZ[subscript 4]⟩ = (|0000⟩ + |1111⟩)/√2 has positive tripartite information, so this state cannot be described by a classical ER bridge. Large black holes with massive amounts of entanglement between them can fail to have a classical ER bridge if they are built out of |GHZ[subscript 4]⟩ states. States with nonpositive tripartite information are called monogamous. We conclude that classical ER bridges require monogamous EPR correlations. |
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