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Items tagged with "CQED"

December 17, 2015

Controlling the Thermodynamics of Light

The concept of temperature is critical in describing many physical phenomena, such as the transition from one phase of matter to another.  Turn the temperature knob and interesting things can happen.  But other knobs might be just as important for studying some phenomena.  One such knob is chemical potential, a thermodynamic parameter first introduced in the nineteenth century by scientists for keeping track of potential energy absorbed or emitted by a system during chemical reactions.

July 27, 2015

Quantum speed up in an optical cavity

Control systems are ubiquitous, and as essential as they are easy to overlook. For instance, turning the dial on a thermostat feels as trivial as moving a piece on a board game, but this control system is actually quite complex.

November 18, 2013

Optical cavity--not as painful as a trip to the dentist

Optical cavities can be made by arranging two mirrors facing each other. In this example, light bounces back and forth, forming a standing wave between the mirrors. One of the mirrors is designed to leak out a fraction of the light. Because of the boundaries created by the mirrors, the cavity will only build up light that satisfies a resonance condition--the light's wavelength must be a half-integer multiple of the cavity length. This means that cavities can be used to create narrow frequency sources. Read more to learn more about a cool research result using cavities.

March 31, 2013

Quantum Dot Commands Light

All computers, even the future quantum versions, use logic operations or “gates,” which are the fundamental building blocks of computational processes. JQI scientists, led by Professor Edo Waks, have performed an ultrafast logic gate on a photon, using a semiconductor quantum dot.

December 17, 2012

Nobel Work: Congratulations to David Wineland and Serge Haroche

The Joint Quantum Institute would like to again congratulate the 2012 Nobel Prize in physics recipients, David Wineland and Serge Haroche.

October 17, 2012

Bus Service for Qubits

Superconducting circuits speak directly with semiconductor-based qubits to push forward the technology needed for quantum computing.