Tag Archives: Quantum Physics

Parametric Amplification for Silicon Quantum Devices

Posted on May 11, 2022 by rberkowitz

A new design based on the quantum capacitance of a silicon quantum dot could enable scalable, high-fidelity qubit readout. Continue reading →

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Heat Leaks from Trapped-Ion Qubits

Posted on March 18, 2022 by rberkowitz

By determining whether two qubits are coupled to a third “hidden” one, researchers can detect whether energy is irreversibly lost from a quantum system. Read more in APS Physics…

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Extracting the Spin and Valley Information of Electrons

Posted on February 9, 2022 by rberkowitz

An electron’s spin and valley information can be determined by monitoring how easily that electron passes through a qubit.  Read more in APS Physics…

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Quantum Measurement Strikes a Balance

Posted on February 3, 2022 by rberkowitz

An experiment demonstrates the trade-off between measurement and total information content—comprising gain, disturbance, and reversibility—in a quantum system. Continue reading →

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A Physical Match for the Riemann Zeta Function

Posted on December 8, 2021 by rberkowitz

Mathematical properties of a famous number-theory conjecture correspond to the physical scattering properties of a quantum field theory. Continue reading →

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A Universal Model of Spin Relaxation

Posted on November 19, 2021 by rberkowitz

A first-principles theory predicts nonequilibrium spin dynamics, including various quantum scatterings for general solid materials. Continue reading →

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Research Team Unlocks Path to a Quantum Future

Posted on October 12, 2021 by rberkowitz

Developing new pathways to create and protect quantum coherence will enable exquisitely sensitive measurement and information processing devices that function at ambient or even extreme conditions. Continue reading →

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A Hallmark of Topological Insulators is Measured in Atoms

Posted on September 27, 2021 by rberkowitz

Using ultracold atoms, researchers measure the number of chiral edge states in a system with time-reversal symmetry. Continue reading →

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Quantum Metasurfaces Entangle Photons on Demand

Posted on July 21, 2021 by rberkowitz

When it’s modulated by laser beams, a surface made of polarizable meta-atoms can entangle a photon’s properties in multiple, controllable ways. Continue reading →

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Macroscopic systems can be controllably entangled and limitlessly measured

Posted on July 1, 2021 by rberkowitz

Two oscillating membranes demonstrate correlations forbidden by classical physics. Continue reading →

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