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New Techniques Improve Quantum Communication, Entangle Phonons

Former postdoctoral fellow Audrey Bienfait works on the quantum hardware.

Scientists with the Pritzker School of Molecular Engineering at the University of Chicago have demonstrated a new quantum communication technique.

Credit: Nancy Wong

Scientists at the University of Chicago's Pritzker School of Molecular Engineering (PME) have demonstrated a new quantum communication method that connects two communication nodes with a channel, in order to quantum-mechanically transmit data between the nodes without occupying the linking channel.

The research exploited the phenomenon of entanglement between nodes, and realized the first-ever entanglement between two phonons—quantum particles of sound.

PME's Andrew Cleland and colleagues entangled the nodes using microwave photons through a microwave cable by turning the system on and off in a controlled manner, sending information between them without transmitting photons through the cable.

The system must currently operate at near-zero temperatures, but it could potentially function at room temperature with atoms instead of photons.

The phonon entanglement enabled the execution of a quantum eraser experiment, in which data was deleted from a measurement even after its completion.

From University of Chicago Pritzker School of Molecular Engineering
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Abstracts Copyright © 2020 SmithBucklin, Washington, DC, USA


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