Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session K28: Landauer-Bennett Prize Award SymposiumInvited Live Streamed Prize/Award
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Sponsoring Units: DQI Chair: Jerry Chow, IBM TJ Watson Research Center Room: McCormick Place W-190A |
Tuesday, March 15, 2022 3:00PM - 3:36PM |
K28.00001: Scaling up Quantum Computing with Ion Chains Invited Speaker: Marko Cetina To perform useful quantum computation, we need to manipulate many qubits while protecting our system from errors. I will present our recent results on fault-tolerant preparation, measurement, rotation, and stabilizer measurement using a Bacon-Shor error-correcting code with 13 trapped ion qubits [1]. Comparing fault-tolerant protocols to non-fault tolerant protocols, we see significant reductions in the error rates of the logical primitives in the presence of noise. I will discuss a variant of the Shor code that is robust to idling errors caused by laser noise and magnetic field fluctuations and present measurements that show a factor of 4 improvement of the coherence time of the logical memory [2]. I will conclude with a discussion of the noise sources in our platform, and their effect on the scaling of ion systems [3]. |
Tuesday, March 15, 2022 3:36PM - 4:12PM |
K28.00002: Scaling up atom arrays Invited Speaker: Huanqian Loh Atom arrays are a promising platform for scalable, programmable bottom-up control of individual qubits for quantum information science and metrology. In this talk, I will discuss the limits to scaling up atom arrays and present a solution involving tweezers set to a D1 magic wavelength. Unlike D2 magic wavelengths that only exist for cesium, D1 magic wavelengths have been predicted to exist for all the alkali atoms but are not yet observed to date. We demonstrate with our new technique an order-of-magnitude increase in scaling up sodium atom arrays, achieved by using D1 magic wavelength tweezers to trap and image single atoms at low trap depths without having to modulate the trapping and imaging light intensities. I will also discuss different routes to inducing programmable interactions between the singly trapped particles, with an outlook on using the assembled arrays as quantum simulators. |
Tuesday, March 15, 2022 4:12PM - 4:48PM |
K28.00003: Band Engineering and Graph-Theoretic Connections in Circuit QED Invited Speaker: Alicia Kollar The field of circuit QED has emerged as a rich platform for both quantum com- putation and quantum simulation. Lattices of coplanar waveguide (CPW) resonators realize artificial photonic materials in the tight-binding limit [1] capable of realizing non-Eucliudean geometries [2] and unconventional unit cells [3]. Combined with strong qubit-photon interactions, these systems can be used to study dynamical phase transitions, many-body phenomena, and spin models in driven-dissipative systems. Furthermore, the one-dimensional waveguide nature of these resonators permit the creation of unique devices which host photons in curved spaces, gapped flat bands, and novel forms of qubit-qubit interaction. I will show that graph theory is the natural language for describing these microwave photonic systems and how it can be used to understand the types of devices that can be achieved [3], as well as how the physics of these types of devices connects to open problems in other fields such as quantum error correction and pure mathematics [4,5]. |
Tuesday, March 15, 2022 4:48PM - 5:24PM |
K28.00004: Landauer-Bennett Award (2022): Bosonic Quantum Error Correction Invited Speaker: Liang Jiang Bosonic modes are widely used for quantum communication and information processing. Recent developments in superconducting circuits enable us to control bosonic microwave cavity modes and implement arbitrary operations allowed by quantum mechanics, such as quantum error correction against excitation loss errors. I will discuss different bosonic encoding and error correction protocols and provide a perspective on using quantum error correction for various applications, including quantum computing, communication, simulation, and sensing. |
Tuesday, March 15, 2022 5:24PM - 6:00PM |
K28.00005: Codes and calibrated decoders for experimental quantum error-correction Invited Speaker: Theodore J Yoder Quantum error-correction (QEC) promises to scale-up quantum computation to practical relevance, but also demands significant capability from physical qubits and gates. Recent advances in qubit hardware, such as fast measurement and reset as well as increased gate fidelities, have enabled small error-correction experiments and put QEC theory to the test. Challenges remain, but also opportunities. For instance, because real devices do not necessarily have all the connectivity required for a theorist's favorite error-correcting code, we are led to novel codes and fault-tolerant circuitry. Because real noise is not idealized Pauli noise, we are led to novel attempts at calibrating a decoder to the actual noise in a device. This talk focuses on these and other opportunities for QEC on superconducting hardware at IBM. |
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