I will talk about two of our recent proposals for quantum computers based on superconducting JJ circuits [1] and spins in semiconductors [2]: what motivated them, why they are worth pursuing experimentally, and directions for future research.

[1] Semiconductor-inspired design principles for superconducting quantum computing, Nature Communications 7, 11059 (2016 …

LPS & LPS Quantum: who and why we are. LPS Research Programs: building expertise and doing relevant research; creating a community and exploring the technology space. What’s next?: near term plans and perspectives.

ATNS Workshop, Lincoln Laboratory, Boston, MA

We introduce an always-on, exchange-only (AEON) qubit made up of three localized semiconductor spins that offers a true “sweet spot” to fluctuations of the quantum dot energy levels. Both single- and two-qubit gate operations can be performed using only exchange pulses while maintaining this sweet spot. We show how to …

Information technology based on the fundamental nature of the universe, namely quantum physics, can in some cases dramatically outperform the best “classical” solution. In other words, a quantum computer will be important someday. But the challenges are still immense. Somewhat surprisingly, silicon may continue to be an exceptionally relevant material …

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 …

We investigate a hybrid quantum system consisting of spatially separated resonant exchange qubits, defined in three-electron semiconductor triple quantum dots, that are coupled via a superconducting transmission line resonator. Drawing on methods from circuit quantum electrodynamics and Hartmann-Hahn double resonance techniques, we analyze three specific approaches for implementing resonator-mediated two-qubit …

Although the properties of spin-based qubits are specified by the material system they reside in, it’s possible to modify those properties by encoding a qubit into multiple physical spins. Here we consider new operating regimes for encoded spin qubits and discuss their relevance to spin-based quantum computing and qubit-qubit …

Talks

B45.00002 A new look at encoded-qubit quantum dot quantum computing in silicon

E45.00007 Spin-cavity longitudinal coupling for two-qubit gates and measurement

K45.00007 Entangling distant resonant exchange qubits via circuit quantum electrodynamics

K48.00008 Semiconductor-inspired superconducting quantum computing

Organized/Chaired

A13 Quantum Characterization, Verification and Validation

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. Both single- and two-qubit gate operations can be performed using only exchange pulses while maintaining this sweet spot. We show how to interconvert …

The U.S. Army Contracting Command, Aberdeen Proving Ground, Research Triangle Park Division. is issuing this Request for Information (RFI) in support of the U.S. Army Research Office (ARO) and the Laboratory for Physical Sciences (LPS), in seeking information on emerging ideas, concepts, and approaches for qubit-related science and …