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New Techniques Improve Quantum Communication, Entangle Phonons

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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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