Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session B05: Progress in Quantum Computing ImplementationsInvited
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Sponsoring Units: DQI Chair: Birgitta Whaley, University of California, Berkeley Room: LACC 152 |
Monday, March 5, 2018 11:15AM - 11:51AM |
B05.00001: Progress and challenges for topological qubits Invited Speaker: Sankar Das Sarma This abstract not available. |
Monday, March 5, 2018 11:51AM - 12:27PM |
B05.00002: The advantages of trapped-ion quantum computation Invited Speaker: Michael Biercuk Since the earliest multiqubit entangling experiments in the 1990s, quantum information with trapped ions has expanded to include demonstrations of universal reprogrammable computation, digital quantum simulation, and analog quantum simulation at computationally relevant scales. In this talk we will survey recent progress in the development of quantum computers using trapped ions and discuss the unique architectural and technical advantages they provide.We will highlight the current state-of-the-art at the leading edge of trapped-ion quantum computer system size and complexity, but will also address parallel technical demonstrations supporting long-term efforts to build useful quantum computers. These include the realization of ultra-high gate fidelities, novel quantum control techniques, remote entanglement generation, and quantum error correction. Considering a path forward, we will discuss the paradoxical observation that trapped-ion qubits appear best positioned to leverage advanced semiconductor manufacturing techniques. Microfabricated “chip traps” incorporate integrated digital and analog electronics, integrated photonic detectors, and even integrated optics for laser beam delivery, all fabricated in standard semiconductor process flows and in large-scale foundries. |
Monday, March 5, 2018 12:27PM - 1:03PM |
B05.00003: Progress and Challenges for Semiconductor Spin Qubits Invited Speaker: Andrew Dzurak Since the first schemes for spin qubits in semiconductors were proposed [1,2] in 1998 they have generated wide interest because of intrinsically long spin coherence times combined with the prospect of employing semiconductor manufacturing to realize large numbers of integrated qubits. Initial demonstrations utilized quantum dot devices in gallium-arsenide to confine electron spins [3], and by 2012 the first silicon qubits appeared, using either quantum dots or donor potentials to confine electron [4,5] or nuclear spins [6]. Most research nowadays is focused on silicon (and SiGe) due to the very long coherence times (> 1 s) attainable [7] using isotopically-enriched 28Si, which can be considered a spin vacuum. Two-qubit gates using exchange-coupled spins in neighbouring Si quantum dots have now been demonstrated [8], as has strong-coupling between a single spin in Si and a microwave frequency photon [9], opening a path to long-distance qubit coupling. Despite recent rapid progress, a number of challenges must be addressed to realize large-scale spin qubit systems with the fidelities required for fault-tolerant QC. Chief amongst these are materials-related issues, in particular disorder potentials that lead to variations between qubits, and charge noise that degrades fidelities. I will discuss these challenges, and possible solutions accessible with the aid of the existing semiconductor industry. |
Monday, March 5, 2018 1:03PM - 1:39PM |
B05.00004: Progress and Challenges for Engineering Superconducting Qubits Invited Speaker: William Oliver Superconducting qubits are coherent artificial atoms assembled from electrical circuit elements and microwave optical components. Their lithographic scalability, compatibility with microwave control, and operability at nanosecond time scales all converge to make the superconducting qubit a highly attractive candidate for the constituent logical elements of a quantum information processor. In this talk, we review the progress and challenges of engineering superconducting quantum computing implementations. |
Monday, March 5, 2018 1:39PM - 2:15PM |
B05.00005: Silicon Photonic Quantum Computing Invited Speaker: Jeremy O'Brien Of the various approaches to quantum computing, photons are appealing for their low-noise properties and ease of manipulation at the single photon level; while the challenge of entangling interactions between photons can be met via measurement induced non-linearities. However, the real excitement with this architecture is the promise of ultimate manufacturability: All of the components have been implemented on chip, and increasingly sophisticated integration of these components is being achieved. We will discuss the opportunities and challenges of a fully integrated photonic quantum computer. |
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