Tag Archives: Quantum Physics

Parametric Amplification for Silicon Quantum Devices

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

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

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

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

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

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

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

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

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

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

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