Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session C09: Hybrid Quantum SystemsLive
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Chair: Qudsia Quraishi |
Tuesday, June 1, 2021 10:30AM - 10:42AM Live |
C09.00001: Creating non-classical states using deterministic single photon subtraction in waveguides and bi-modal cavities Supratik Sarkar, Golam Bappi, Jinjin Du, Sreesh Venuturumilli, Michal Bajcsy We perform analytical and numerical simulations to investigate deterministic single photon subtraction based upon single photon Raman interaction (SPRINT) of a single three-level Λ-type quantum emitter coupled with a chiral waveguide, and in a bi-modal cavity. Unlike probabilistic single photon subtraction based upon beam-splitter like operations, this approach is quasi-independent of the input field statistics and intensity. We study the effect of photon subtraction from different types of optical inputs – continuous-wave (CW) or pulsed coherent states and Fock states, and study the fidelity of subtraction upon key system parameters. We also discuss the prospects of using various experimental platforms suitable for the task. Moreover, we show that SPRINT-based single photon subtraction can be used to create non-Gaussian quantum states with negative Wigner functions, and negative conditional entropies. Such states can be used as quantum resources in various fields of quantum information theory. Finally, as an interesting example, we show how this mechanism can also be used to create Fock states of arbitrary photon number. |
Tuesday, June 1, 2021 10:42AM - 10:54AM Live |
C09.00002: Probing Enhanced Emission and Coupling of Silicon-Vacancy Centers in Zero-Index Metamaterials Michelle V Chalupnik, Olivia L Mello, Eliza Cornell, Rodrigo Araiza Bravo, Susanne F Yelin, Eric Mazur, Marko Lončar Diamond nanophotonic structures with implanted silicon-vacancy centers have proved a fruitful platform for cavity QED, and strong couplings have been achieved between cavity and emitters. With density-of-states engineering through more exotic dispersion relations, zero-index metamaterials have been proposed as structures that can allow for enhanced (or suppressed) collective emission or enhanced coupling for emitters. In particular, Dirac cone zero-index metamaterials have finite impendence and minimal optical wavepacket distortion, but still show infinite phase velocity along the waveguide direction, producing a constant phase front even among spatially separated emitters. In one-dimensional Dirac cone zero-index metamaterials, density of states can be enhanced as well, loosening restrictions on emitter frequency indistinguishability for emitters with lifetime-limited coherence times. In this talk, I will present simulation results showing quantum interactions of multiple silicon-vacancy emitters evolving in a leaky Dirac cone metamaterial environment. Simulations show promise for use of zero-index metamaterials in quantum network nodes for information-theoretically secure quantum communication. |
Tuesday, June 1, 2021 10:54AM - 11:06AM Live |
C09.00003: High quality factor micro-ring resonator for strong atom-light interactions using miniature atomic beams Bochao Wei, Eshaghian Dorche Ali, Ali Adibi, Chandra Raman An integrated photonic platform is proposed for strong interactions between chip-scale atomic beams and high-quality-factor (Q) micro-resonators. We fabricated a thin-film, air-clad SiN microresonator with a loaded Q of 1.55×10^6 around the optical transition of 87Rb at 780 nm [1]. The estimated single-photon Rabi frequency (2g) is 2??×64MHz at 100 nm above the resonator. Our simulation result indicates that slow atomic beams from a 2D+ MOT with a longitudinal speed in the range of 0.2 m/s to 30 m/s will interact strongly with our resonator without crashing. This can allow the detection of single-atom transits and quantum operations during transit time. We also showed that racetrack resonators with a similar Q can be used to detect thermal atomic beams with velocities around 300 m/s. Without the requirement of atom trapping, the ultra-high vacuum would not be needed. Together with the high repetition rate it provides, we believe this platform can set the stage for a new class of scalable single-atom photonic devices on-chip. |
Tuesday, June 1, 2021 11:06AM - 11:18AM Live |
C09.00004: Nanophotonic quantum interface and transportable entanglement for atom arrays Paloma Ocola, Tamara Dordevic, Polnop Samutpraphoot, Hannes Bernien, Brandon Grinkemeyer, Ivana Dimitrova, Vladan Vuletic, Mikhail Lukin Realization of an efficient quantum optical interface for multi-qubit systems is an outstanding challenge in quantum engineering. Using atomic qubits trapped in individually controlled optical tweezers with the ability to move to and from a nanofabricated photonic crystal cavity, we demonstrate a method for interfacing neutral atoms with optical photons. With this cavity QED platform, we show full coherent control, efficient non-demolition readout, and entanglement of atom pairs strongly coupled to the cavity. By encoding the qubits into the magnetically insensitive ground states and utilizing dynamical decoupling, the entangled state is transported away from the cavity and verified in free space. This combination of a compact, integrated optical link and entanglement transport is a step toward quantum networking with neutral atom quantum processors. |
Tuesday, June 1, 2021 11:18AM - 11:30AM Live |
C09.00005: Interfacing single mm-wave and optical photons using Rydberg atoms: Part I Mark J Stone, Aziza Suleymanzade, Aishwarya Kumar, Lavanya Taneja, David I Schuster, Jonathan Simon Optical light naturally interfaces with large ensembles of cold atoms, while GHz frequencies realize extremely strong light-matter coupling in synthetic platforms. In this talk, I will describe a hybrid quantum system for entangling and interconverting single optical and millimeter wave photons using ultracold Rydberg atoms. We employ cavity Rydberg EIT to map an optical photon onto a collective atomic Rydberg excitation, where the large electric dipole moment provides a strong nonlinear coupling to the mm-wave field. Our hybrid device consists of a crossed superconducting mm-wave cavity at 5K with a Q of 200,000 and an optical Fabry-Perot resonator, allowing optical access to couple to atoms. I will describe our experiment including the hybrid cavity design, cooling and manipulation of atoms in a cryogenic environment, techniques to stabilize high-finesse optical cavities against the vibrations from a cryocooler, and methods for generating dual-frequency photon interactions. The talk will be presented in two parts. |
Tuesday, June 1, 2021 11:30AM - 11:42AM Live |
C09.00006: Interfacing single mm-wave and optical photons using Rydberg atoms: Part II. Aziza Suleymanzade, Mark J Stone, Aishwarya Kumar, Lavanya Taneja, David I Schuster, Jon Simon Continuing Part I of this talk, I will present recent results from our hybrid quantum system for entangling optical and mm-wave photons. We will present data on Rydberg Electromagnetically Induced Transparency (EIT) inside our hybrid cavity and Autler-Towns splitting of the EIT due presence of the mm-wave mode of the cavity. Using auxiliary modes of the mm-wave cavity, we implement flexible AC Stark tuning and polarizability control of Rydberg states. We will conclude by describing our efforts towards single-photon resolution in the strong coupling regime, high cooperativity cavity QED in the Rydberg manifold, and progress towards high-bandwidth mm-wave to optical transduction. |
Tuesday, June 1, 2021 11:42AM - 11:54AM Live |
C09.00007: Progress towards a hybrid atom-superconductor interface Lindsey F Keary, Katie McDonnell, Jonathan Pritchard |
Tuesday, June 1, 2021 11:54AM - 12:06PM Live |
C09.00008: Controlling fluorescence of two level systems for heterogeneous quantum networks David Hucul, Herbert Fotso, Zachary Smith, William Grant, Paige Haas, Michael Macalik, Justin Phillips, Harris Rutbeck-Goldman, Boyan Tabakov, James Williams, Carson Woodford, Kathy-Anne Soderberg By harnessing the advantages of different quantum technologies, heterogeneous quantum networks are promising candidates for enhanced timing, sensing, communication, and information processing. In typical quantum networks, identical photons, emitted by their parent qubits, interfere on a beam splitter to create heralded entanglement between network nodes. However, creating entanglement between heterogeneous qubits is complicated by the interference of the qubits' distinguishable photons. We show the fluorescence spectrum of a two-level atomic system can be controlled by modulating an excitation laser, and the fluorescence of the two-level system can be tuned to more closely match that of other systems. The matched spectra can then be used in standard heralded photon interference schemes to create entanglement between different remote qubits. Our results show this scheme's prospects as a generic entanglement bus between different types of qubits in a quantum network. Distribution A: cleared for public release. Case AFRL-2021-0182 |
Tuesday, June 1, 2021 12:06PM - 12:18PM Live |
C09.00009: Progress towards remote entanglement between a trapped ion and a solid state qubit Alexander Kato, Jennifer F Lilieholm, Sara Branson, Vasileios Niaouris, Maria Viitaniemi, Christian Zimmermann, LIUDMILA ZHUKAS, Xiayu Linpeng, Kai-Mei C Fu, Boris B Blinov Trapped ytterbium ions have the longest memories (coherence times) of any qubit, yet gate speeds are slow relative to solid state qubit systems. A hybrid quantum system has the potential to take advantage of both of these properties. Donor qubits in zinc oxide have an optical transition near the cooling transition for ytterbium ions, making these two species interesting candidates for a remote entanglement experiment. However, the mismatch in temporal profile between photons emitted from disparate qubits remains an outstanding challange. We present a scheme for overcoming this temporal mismatch using established pulse-shaping techniques, and progress towards building a system for performing the experiment. |
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