Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session M31: Atomic Quantum Systems IIFocus Live
|
Hide Abstracts |
Sponsoring Units: DQI DAMOP Chair: Susan Clark, Sandia National Laboratories |
Wednesday, March 17, 2021 11:30AM - 11:42AM Live |
M31.00001: Individual control of nuclear spin qubits in an array of neutral strontium atoms Brian Lester, Krish Kotru, Mickey Patrick McDonald, Remy P.M.J.W. Notermans, Kayleigh Cassella, Albert Ryou, Stanimir Kondov, Lucas Peng, Peter Battaglino, Joseph Lauigan, Emme Yarwood, Robin Coxe, Jonathan Patrick King, Benjamin Bloom Ultracold neutral atoms have emerged as a promising platform for scalable quantum computation. Universal single-qubit control requires high quality state preparation, spatially resolved manipulation, and projective readout of each qubit. For state preparation and readout, neutral atom platforms can apply techniques commonly used in quantum gas microscopes and single atom trapping machines. Furthermore, the ability to isolate the internal spin states of individual neutral atoms from both external fields and neighboring atoms allows for seconds-scale coherence times. Here, we will present initial results on the coherent, site-resolved control of an array of atomic qubits comprised of neutral strontium atoms. |
Wednesday, March 17, 2021 11:42AM - 11:54AM Live |
M31.00002: Data transmission by quantum matter-wave modulation Robin Röpke, Nicole Kerker, Alexander Stibor Classical communication schemes exploiting wave modulation are the basis of our information era. Quantum information techniques with photons enable future secure data transfer in the dawn of decoding quantum computers. In this presentation we demonstrate that also matter-waves can be applied for secure data transfer. Our technique allows the transmission of a message by a quantum modulation of coherent electrons in a biprism interferometer. The data is encoded in the superposition state by a Wien filter introducing a longitudinal shift between separated matter-wave-packets. The transmission receiver is a delay line detector performing a dynamic contrast analysis of the fringe pattern. Our method relies on the Aharonov-Bohm effect and has no light optical analog since it does not shift the phase. We demonstrate that an eavesdropping attack will terminate the data transfer by disturbing the quantum state and introducing decoherence. Furthermore, the security limitations of our multi-particle scheme are discussed and a key distribution protocol is presented that prevents active eavesdropping. |
Wednesday, March 17, 2021 11:54AM - 12:06PM Live |
M31.00003: Probing the electric-field noise induced by dielectric surfaces using a trapped ion Markus Teller, Dario Fioretto, Philip Holz, Philipp Schindler, Viktor Messerer, Yueyang Zou, Rainer Blatt, Tracy E Northup In ion traps with integrated fiber cavities ions are placed in close proximity of a dielectric surface. Dielectric layers on top of the metallic trap electrodes are known to lead to heating of trapped ions [1]. However, the influence of bulk dielectric structures on an ion has not yet been shown experimentally. |
Wednesday, March 17, 2021 12:06PM - 12:18PM Live |
M31.00004: Multi-zone parallel qubit addressing via multi-wavelength integrated photonics Robert Niffenegger, Jules M Stuart, David L Reens, Cheryl Sorace-Agaskar, David Kharas, Suraj Bramhavar, William Loh, Gavin West, Ryan Maxson, Alex Medeiros, Colin D. Bruzewicz, Robert McConnell, Jeremy Sage, John Chiaverini The integration of photonics within surface-electrode ion-trap chips could enable the development of larger quantum computers and portable quantum sensors. Recently, we demonstrated operation of an ion-trap chip where integrated photonics delivered all of the required wavelengths, from violet to infrared, necessary for control and read-out of Sr+ qubits[1]. Laser light was coupled onto the chip via an optical-fiber array, creating an inherently stable optical path that we use to demonstrate qubit coherence resilient to platform vibrations. Contemporaneously high fidelity two qubit gates using integrated photonics were also demonstrated [2]. Here we explore using multiple zones of interaction to perform parallel qubit operations on multiple ions using parallel integrated beam paths. Recent improvements to our photonics platform have improved our grating beam targeting accuracy, improved grating efficiency, reduced blue propagation loss and input coupling loss. |
Wednesday, March 17, 2021 12:18PM - 12:30PM Live |
M31.00005: Room-temperature single-photon source with near-millisecond built-in memory Karsten Dideriksen, Rebecca Schmieg, Michael zugenmaier, Eugene S Polzik Non-classical photon sources are a crucial resource for distributed quantum networks. Photons generated from matter systems with memory capability are particularly promising, as they can be integrated into a network where each source is used on-demand. Among all kinds of solid state and atomic quantum memories, room-temperature atomic vapours are especially attractive due to their robustness and potential scalability. To-date room-temperature photon sources have been limited either in their memory time or the purity of the photonic state. Here we demonstrate a single-photon source based on room-temperature memory. Following heralded loading of the memory, a single photon is retrieved from it after a variable storage time. The single-photon character of the retrieved field is validated by the strong suppression of the two-photon component with antibunching as low as g(2)=0.20±0.07. Non-classical correlations between the heralding and the retrieved photons are maintained for up to τNC=(0.68±0.08) ms, more than two orders of magnitude longer than previously demonstrated with other room-temperature systems. Correlations sufficient for violating Bell inequalities exist for up to τBI=(0.15±0.03) ms. |
Wednesday, March 17, 2021 12:30PM - 12:42PM Live |
M31.00006: Millisecond electron spin coherence time in 167Er3+: Y2O3 at milliKelvin temperatures Shobhit Gupta, Yuxiang Pei, Haito Zhang, Jun Yang, Manish Kumar Singh, David I Schuster, Tian Zhong Erbium (Er3+) ions in solid-state hosts are a promising platform for quantum networks and hybrid quantum systems [1] due to their long spin coherence times and telecom band optical transition at 1.54 μm. We perform continuous wave (cw) and pulsed Electron Spin Resonance (ESR) spectroscopy of erbium (167Er3+) dopants in Y2O3 [2]. We report the estimated electron Zeeman g and hyperfine A tensor measured with X-band cw-ESR. We perform milliKelvin pulsed ESR at 5 GHz to measure Hahn-Echo electron spin coherence time of 1.5 millisecond and with a further enhancement to 8 milliseconds with dynamic decoupling. We further report the device development of superconducting low impedance resonator on epitaxially grown thin-film Y2O3 [3] to allow for further increased coupling rates between the cavity photons and electron spins on the order of kHz for high-sensitivity ESR. |
Wednesday, March 17, 2021 12:42PM - 12:54PM Live |
M31.00007: Multifunctional on-chip storage at telecommunication wavelength for quantum networks Mi Lei, Ioana Craiciu, Jake Rochman, John G Bartholomew, Andrei Faraon Implementing optical quantum memories with frequency and bandwidth control are important for quantum information processing and communication. Rare earth ions in solids are one of the most promising platforms due to their long optical and spin coherence times. Erbium is of particular interest because it has an optical transition in the telecom band, which allows interfacing devices with silicon photonics and fiber communication networks. |
Wednesday, March 17, 2021 12:54PM - 1:06PM Live |
M31.00008: Abelian lattice gauge theory with Rydberg atoms, trapped ions and quantum computers Yannick Meurice, Jin Zhang, Shan-Wen Tsai, Judah F Unmuth-Yockey, Alexei Bazavov, Ryo Sakai, Leon Hostetler We discuss the tensor network formulation of the Abelian Higgs |
Wednesday, March 17, 2021 1:06PM - 1:18PM Live |
M31.00009: Towards simulating 2D effects in lattice gauge theories on a quantum computer Luca Dellantonio Gauge theories are the most successful theories for describing nature, but obtaining numerical solutions is challenging. We propose a quantum simulation to study properties in two-dimensional quantum electro-dynamics (2D QED). Our protocols allow in principle scaling up to large lattices and offer the perspective to connect the lattice simulation to low energy observable quantities in the continuum theory. By including both dynamical matter and a non-minimal gauge field truncation, we provide the opportunity to observe 2D effects on present day quantum hardware. More specifically, we present two Variational Quantum Eigensolver (VQE) based protocols for the study of magnetic field effects, and for taking an important first step towards computing the running coupling of QED. For both instances, we include variational quantum circuits, which we apply to trapped ion quantum computers. We simulate the proposed VQE experiments to calculate the required measurement budget. While this feasibility analysis is done for trapped ions, our approach can be adapted to other platforms. The techniques presented here pave the way for reaching beyond the capabilities of classical simulations by extending our framework to include fermionic potentials or topological terms. |
Wednesday, March 17, 2021 1:18PM - 1:30PM Live |
M31.00010: Building and Benchmarking Trapped Ion Quantum Computers at Honeywell Russell Stutz Honeywell Quantum Solutions has made available quantum computers based on trapped atomic ions. The systems utilize ion transport operations to allow for interactions between arbitrary pairs of qubit ions, as well as the ability to isolate any single qubit for quantum operations with small cross talk errors. Here, we will describe system performance metrics of these systems, both component benchmarks as well as more holistic system benchmarks. Recent demonstrations on these devices will also be discussed. |
Wednesday, March 17, 2021 1:30PM - 2:06PM Live |
M31.00011: Commercial Quantum Computing with Trapped Ions Invited Speaker: Jungsang Kim Trapped ions were the first physical platform to demonstrate quantum logic gate operation, but the traditional approach to ion trapping experiments requires ultra-high vacuum chambers, many complex laser systems in the UV wavelength range, and sophisticated radio frequency and microwave electronics to control the experiments. The experimental setups typically require daily maintenance to keep it running and the operations of the experiments are largely manual, far from the notion of a commercial, fully autonomous computer system. Over the last five years or so, there have been tremendous amounts of engineering efforts devoted to developing entirely new approaches to ion trapping experiments that paved a path to reliable and automated system operation. In the first part of the talk, I will discuss a host of disruptive experimental techniques developed by our extended collaborators that led to reliable quantum computing with ion traps, such as compact vacuum chambers, stable optical design principles, and advanced synthesis techniques for precision radio frequency signals. Such technological advances have enabled the prospect of a commercial quantum computer based on trapped ion qubits. In the second part of the talk, I will describe the commercial quantum computer systems developed and operational at IonQ today, and a projection for improving the computational performance in the coming years. |
Wednesday, March 17, 2021 2:06PM - 2:18PM Live |
M31.00012: Gauge freedom, quantum measurements, and time-dependent interactions in cavity and circuit QED SALVATORE SAVASTA, Omar Di Stefano, david zueco, Stephen Hughes, Franco Nori Recently, new regimes of cavity QED, where the interaction strength is comparable (ultrastrong) or even higher (deep-strong) than the transition frequencies in the system, have been explored in several settings. It has been shown that, in these regimes, the quantum Rabi model violates gauge invariance. |
Wednesday, March 17, 2021 2:18PM - 2:30PM Live |
M31.00013: Polarization-Modulator based Quantum Key Distribution (QKD) Source Tahereh Rezaei, Andrew Conrad, Daniel Sanchez-Rosales, Alexandre DeCesare, Warner A. Miller, Daniel J Gauthier, Paul G Kwiat In this effort, we present progress towards demonstrating a Decoy-State Quantum Key Distribution (QKD) source which is based on a polarization-modulator and an attenuated pulsed laser that is wavelength stable. A three-state QKD protocol is achieved by the preparing the polarization of the quantum state. The polarization-modulator based QKD source improves security by eliminating several sources of side-channel attacks which are present when using multiple sources to produce different QKD states. The QKD source design is presented along with evaluation of critical subsystems, and the performance is characterized including Quantum Bit Error Rate (QBER), Quantum State Tomography, and achievable Key Rates. The QKD source is designed to operate under compact Size, Weight, and Power (SWaP) limitations. Applications of the Polarization-Modulator QKD source include deployment in future mobile quantum networks including Unmanned-Aerial Vehicles (UAV) and autonomous vehicles, in addition to fixed fiber-based quantum networks. |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700