December 14th, 2020 | by admin | published in Featured, Highlights, Papers, Quantum Computing, Research
Universal Nonadiabatic Control of Small-Gap Superconducting Qubits Daniel L. Campbell, Yun-Pil Shim, Bharath Kannan, Roni Winik, David K. Kim, Alexander Melville, Bethany M. Niedzielski, Jonilyn L. Yoder, Charles Tahan, Simon Gustavsson, and William D. Oliver Phys. Rev. X 10, 041051 – Published 14 December 2020 ABSTRACT Resonant transverse driving of a two-level system as viewed in […]
July 21st, 2019 | by admin | published in Featured, Highlights, Papers, Quantum Computing, Research
We revisit quantum capacitance from first principles to understand its potential for quantum-limited readout. We show that the readout speed can be unexpectedly fast with high kinetic inductance cavities while the qubit remains in a particularly immune state to noise.
May 4th, 2019 | by admin | published in Featured, Highlights, Nanotechnology, Quantum Computing, Research
Proposed probe chip a potential shortcut for quantum device manufacturing cycle
April 14th, 2019 | by admin | published in Featured, Highlights, News, Quantum Computing, Research
Why is it better to operate exchange gates by tuning the tunnel gate instead of doing detuning? This paper shows, quantitately, that tunnel gates inflict less susceptibility to charge noise. So if you are making a quantum dot quantum computer, make sure your fast lines are on the barrier gates! We present a theory for understanding […]
July 20th, 2016 | by admin | published in Featured, Highlights, Quantum Computing, Research
We introduce an always-on, exchange-only qubit made up of three localized semiconductor spins that offers a true “sweet spot” to fluctuations of the quantum dot energy levels.
March 19th, 2016 | by admin | published in Featured, Quantum Computing, Research
Superconducting circuits offer tremendous design flexibility in the quantum regime culminating most recently in the demonstration of few qubit systems supposedly approaching the threshold for fault-tolerant quantum information processing. Competition in the solid-state comes from semiconductor qubits, where nature has bestowed some very useful properties which can be utilized for spin qubit based quantum computing. […]
July 4th, 2014 | by admin | published in Featured, Highlights, Quantum Computing, Research
Superconducting circuits are exceptionally flexible, enabling many different devices from sensors to quantum computers. Separately, epitaxial semiconductor devices such as spin qubits in silicon offer more limited device variation but extraordinary quantum properties for a solid-state system. It might be possible to merge the two approaches, making single-crystal superconducting devices out of a semiconductor by […]
November 28th, 2011 | by admin | published in All, Blog, Featured, Highlights, Nanotechnology, Papers, Phonitons, Research
This work explores the possibility of a new, man-made quantum object: a hybridization of a localized, long-lived phonon (a quantum of sound) and a matter excitation. That this is possible is not obvious.
September 27th, 2010 | by admin | published in All, Conferences, Featured, Highlights, Quantum Computing
The spin of an electron in silicon may act as an information carrier in future information technologies, from quantum computers to spintronics. For quantum information applications, the spin of cold localized electrons in silicon can make a good quantum memory due to the purifiability of the spin environment (a spin-0 nuclear isotope is available) and […]
November 1st, 2007 | by admin | published in All, Featured, Highlights, Solid Light
As physics and engineering extend their reach to the control of single excitations of nature, we gain the ability to explore and even design the interaction of matter and energy in fundamentally new ways. One of the most interesting opportunities this presents is controllable interactions between many quantum particles — such as electrons — which is traditionally the realm of condensed matter physics. The questions we asked ourselves were these: Can we also do this with light? Can it be useful? We show that the answer is YES!