Microwave-free, high-fidelity, hot superconducting qubits

Microwave-free, high-fidelity, hot superconducting qubits

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. Niedzi...

Quantum-limited measurement of spin qubits via curvature coupling to a cavity

Quantum-limited measurement of spin qubits via curvature coupling to a cavity

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 kine...

Induced quantum dot probe for material characterization

Induced quantum dot probe for material characterization

Proposed probe chip a potential shortcut for quantum device manufacturing cycle ...

Theory of barrier vs tilt exchange gate operations in spin-based quantum computing

Theory of barrier vs tilt exchange gate operations in spin-based quantum computing

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 cha...

Always-on Exchange-ONly (AEON) spin-based qubits

Always-on Exchange-ONly (AEON) spin-based qubits

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....

Semiconductor-inspired superconducting quantum computing

Semiconductor-inspired superconducting quantum computing

Superconducting circuits offer tremendous design flexibility in the quantum regime culminating most recently in the demonstration of few qubit systems supposedly approaching the th...

How to make superconducting circuits out of a semiconductor

How to make superconducting circuits out of a semiconductor

Superconducting circuits are exceptionally flexible, enabling many different devices from sensors to quantum computers. Separately, epitaxial semiconductor devices such as spin qub...

Introducing the phoniton: A sound-based analogue of cavity-QED, a tool for controlling sound at the quantum level

Introducing the phoniton: A sound-based analogue of cavity-QED, a tool for controlling sound at the quantum level

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 p...

News


Theory of barrier vs tilt exchange gate operations in spin-based quantum computing
Apr 14, 2019 | by | Read →

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 cha...

PRB: Electron g-factor of valley states in realistic silicon quantum dots
Apr 14, 2019 | by | Read →

We explain an unexpected anomoly of the g-factor (how the electron spin qubit energy changes as a function of magnetic field) in silicon quantum dots. This new mechanism creates a...

Nature Communications: Semiconductor-inspired design principles for superconducting quantum computing
Mar 16, 2016 | by | Read →

Superconducting circuits offer tremendous design flexibility in the quantum regime culminating most recently in the demonstration of few qubit systems supposedly approaching the th...

Preprint: Charge-noise-insensitive gate operations for always-on, exchange-only qubits
Jan 31, 2016 | by | Read →

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 ...

Paper: Spin-orbit coupling and operation of multi-valley spin qubits
Nov 5, 2015 | by | Read →

Spin qubits composed of either one or three electrons are realized in a quantum dot formed at a Si/SiO_2-interface in isotopically enriched silicon. Using pulsed electron spin reso...

C. Tahan named Fellow of the American Physical Society
Oct 6, 2015 | by | Read →

Congratulations to all the new APS Fellows nominated by GQI....

Preprint: Semiconductor-inspired superconducting quantum computing
Jul 28, 2015 | by | Read →

Superconducting circuits offer tremendous design flexibility in the quantum regime culminating most recently in the demonstration of few qubit systems supposedly approaching the th...

Technology and Society


Nanotechnology, Quantum Information Technology, Society: Course, Definitions, Essays
Feb 8, 2008 | by | Read →

Exploring advanced classical and quantum technologies and their societal implications. Definitions and essays on nanotechnology and quantum technology....

Quantum Information Technology and Industry
Feb 7, 2008 | by | Read →

A new era of physics careers in industry is about to begin, based on the quantum information science/technology (QIS/T) revolution. Whether this statement is true, or can be made t...

Spookytechnology and Society
Oct 12, 2007 | by | Read →

Spookytechnology and Society: Understanding and anticipating the second revolution in quantum-designed technologies Download the article this summary is based on: C. Tahan, Spookyt...

Preprint: Spookytechnology and Society
Oct 12, 2007 | by | Read →

New technologies based on the exploitation of so-called "second order" quantum phenomena - such as quantum entanglement - deserve a public-friendly, rational, and sexy name. Spooky...

Chapter: The Nanotechnology R(evolution)
Dec 23, 2006 | by | Read →

Nanotechnology as a social concept and investment focal point has drawn much attention. Here we consider the place of nanotechnology in the second great technological revolution of...

Identifying Nanotechnology in Society
Dec 9, 2006 | by | Read →

Manufacturing materials and systems with components thousands of times smaller than the width of a human hair promises vast and sometimes unimaginable advances in technology. Yet t...

Identifying Nanotechnology in Society
Dec 8, 2006 | by | Read →

preprint; Chapter in Advances in Computers 71:Nanotechnology, edited Marvin Zelkowitz, Elsevier, 2007 Identifying Nanotechnology in Society Charles Tahan Cavendish Laboratory, Uni...


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Microwave-free, high-fidelity, hot superconducting qubits
Microwave-free, high-fidelity, hot superconducting qubits

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. Niedzi...

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Papers

Microwave-free, high-fidelity, hot superconducting qubits
Microwave-free, high-fidelity, hot superconducting qubits

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. Niedzi...

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Preprints

Connecting spin qubits fast via longitudinal coupling
Connecting spin qubits fast via longitudinal coupling

Modulated longitudinal gates on encoded spin-qubits via curvature couplings to a superconducting cavity Rusko Ruskov, Charles Tahan We propose entangling operations based on t...

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Talks

APS March Meeting 2015

See all our great talks at MM2015 in San Antonio!...

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Press

The Physics arXiv Blog highlights the acceptor:Si quantum phonodynamics preprint
The Physics arXiv Blog highlights the acceptor:Si quantum phonodynamics preprint

The science of how light interacts with matter is called quantum electrodynamics or QED and the theory on which it is based is one of the crowning achievements of 20th century phys...

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