Synopsis: Entangled through a Wormhole

Expanding on recent studies of black hole entanglement, researchers have now drawn a connection between entangled quark pairs and wormholes.

Quantum entanglement is weird enough, but it might get weirder still through a possible association with hypothetical wormholes. Over the past year, theorists have been hard at work exploring the entanglement of two black holes. A pair of papers in Physical Review Letters advances the story by showing that a string-based representation of two entangled quarks is equivalent to the spacetime contortions of a wormhole.

A common feature of entanglement and wormholes is that they both seemingly imply faster-than-light travel. If one imagines two entangled particles separated by a large distance—a so-called Einstein-Podolsky-Rosen (EPR) pair—then a measurement of one has an immediate effect on the measurement probabilities of the other, as if information travels instantaneously between them. Similarly, a wormhole—or Einstein-Rosen (ER) bridge—is a “shortcut” connecting separate points in space, but no information can actually pass through. Recent work has shown that the spacetime geometry of a wormhole is equivalent to what you’d get if you entangled two black holes and pulled them apart—an equivalence that can be summarized by “ER = EPR.”

The latest papers in this development extend the equivalence beyond black holes to quarks. As previous studies have shown, two entangled quarks can be represented as the endpoints of a string in a higher dimensional space, where certain calculations end up being easier. Kristan Jensen of the University of Victoria, Canada, and Andreas Karch of the University of Washington, Seattle, imagine the entangled quarks are accelerating away from each other, so that they are no longer in causal contact. In this case, the connecting string becomes mathematically equivalent to a wormhole. Using a different approach, Julian Sonner from the Massachusetts Institute of Technology, Cambridge, has derived the same result starting from quark/antiquark creation in a strong electric field (the Schwinger effect). The wormhole connection may provide new insights into entanglement, as suggested by calculations that equate the entropy of the wormhole to that of the quarks. – Michael Schirber


Announcements

More Announcements »

Subject Areas

Quantum Physics

Previous Synopsis

Quantum Information

Computing with Entangled Ions

Read More »

Next Synopsis

Related Articles

Synopsis: Entangled Mirrors Could “Reflect” Quantum Gravity
Quantum Physics

Synopsis: Entangled Mirrors Could “Reflect” Quantum Gravity

A proposed interferometry experiment could test nonrelativistic quantum gravity theories by entangling two mirrors weighing as much as apples. Read More »

Viewpoint: Towards an Atomtronic Diode
Atomic and Molecular Physics

Viewpoint: Towards an Atomtronic Diode

Rubidium atoms in an optical trap have been made to exhibit negative differential conductance, a phenomenon normally found in semiconductor diodes. Read More »

Viewpoint: Sending Quantum Messages Through Space
Quantum Information

Viewpoint: Sending Quantum Messages Through Space

Fragile photon states useful for quantum communication can be faithfully transmitted and distinguished over a link between an orbiting satellite and a telescope on Earth. Read More »

More Articles