Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session Z66: DAMOP: Hybrid Quantum Systems III |
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Sponsoring Units: DAMOP Chair: Chitres Guria, Yale University Room: Room 413 |
Friday, March 10, 2023 11:30AM - 11:42AM |
Z66.00001: Superfluid Cavity Electromechanics with Microfluidic Helmholtz Resonators Sebastian Spence, Emil Varga, John P Davis Superfluid helium-4 is a promising mechanical element for cavity optomechanical and electromechanical experiments, with a large bandgap, low dielectric loss, and ultra-low acoustic loss at millikelvin temperatures. We demonstrate the first microwave cavity electromechanical implementation of a superfluid Helmholtz device, continuing development of superfluid micromechanical resonators within the Davis Lab. This experiment advances recent kHz cavity electromechanics-like devices [1] into the GHz microwave regime, greatly increasing sensitivity, while avoiding the photothermal effect associated with optics. We use a two probe electromechanically induced transparency / amplification scheme [2] to measure the more fundamental properties of the coupling scheme, incorporating additional phase-locked demodulation to remove the probe tones, leaving only coherently driven effects. The electromechanical coupling scheme of this work can now be used to create powerful tools for observing the properties of superfluid helium, at low temperatures and within confined geometries, potentially leading to studies of non-equilibrium thermodynamics connected to the superfluid state. |
Friday, March 10, 2023 11:42AM - 11:54AM |
Z66.00002: Developments in magneto-mechanics using a cantilever coupled to a SQUID Olivier-Michel Tardif, David Zoepfl, Lukas F Deeg, Christian M Schneider, Gerhard Kirchmair, Mathieu L Juan Tools provided by cavity optomechanics enable near quantum-limited motion control of macroscopic mechanical systems through interaction with light. Historically, in microwave optomechanics, the coupling between a microwave cavity and a mechanical resonator has been provided by a moving capacitance. However, this approach is ultimately limited by the capacitor gap, providing single-photon coupling of the order of g0/2π ~ 300 Hz, often requiring a large intracavity photon number to enhance the total coupling rate (g = g0√n). Further increasing this coupling would enable many applications such as the preparation of non-Gaussian mechanical states or more efficient quantum information processing. |
Friday, March 10, 2023 11:54AM - 12:06PM |
Z66.00003: Studying fundamental physics using a levitated optomechanical system Jiaxiang Wang, Thomas Penny, Benjamin Siegel, Yu-Han Tseng, Molly Watts, Geena Benga, Miriam Martinez, Luke Mozarsky, Emily Peng, Juan Recoaro, David C Moore Measuring tiny forces and momentum transfers can enable many tests of fundamental physics. Levitated optomechanical systems in high vacuum have shown outstanding force and momentum sensitivity due to their extremely low thermal noise, coupled with the ability to precisely control their electric charge state. While further improvements such as scaling up the sensors to large arrays are underway, applications have already been made to search for composite dark matter and millicharged particles. By further controlling the spin degree of freedom of a 10pg mass microsphere, the force and momentum sensitivity have been improved to <1aN/sqrt(Hz) and <100MeV/c respectively, therefore enabling levitated microspheres to be a powerful tool in detecting weakly interacting particles and recoils from single radioactive decays. Extending this scheme to nanospheres shows the potential to search for sterile neutrinos from kinematic reconstruction. |
Friday, March 10, 2023 12:06PM - 12:18PM |
Z66.00004: Magnetic Levitation of Helium-3 Yiqi Wang, Yogesh Patil, Daniel Sibilia, Igor Brandão, Theophilus L Human, Jack G. E Harris A levitated 3He drop is an ideal platform in which to study the rotational motion of macroscopic objects at the quantum level. The strong optomechanical interaction between such a drop’s high finesse optical whispering gallery modes and deformations of its surface should enable a measurement precision capable of resolving quantum fluctuations in the angular momentum of a millimeter-scale drop [1]. Here, we demonstrate progress toward this goal. We have magnetically levitated 3He drops at temperature ~1 K, and characterized their center of mass motion. Unlike in 4He [2], the nuclear paramagnetism of 3He hinders its diamagnetic levitation. To stably levitate drops in high vacuum and at low temperatures, we propose to use microwave-frequency magnetic fields to randomize the nuclear spins, thereby reducing the effect of the nuclear paramagnetism. |
Friday, March 10, 2023 12:18PM - 12:30PM |
Z66.00005: Topological lattices in superconducting circuit optomechanics: strained graphene model Amir Youssefi, Shingo Kono, Andrea Bancora, Mahdi Chegnizadeh, Jiahe Pan, Tobias J Kippenberg Cavity optomechanics enables controlling mechanical motion via radiation pressure interaction, and has contributed to the quantum control of engineered mechanical systems. Yet, nearly all prior schemes have employed single- or few-mode optomechanical systems. In contrast, novel dynamics and applications are expected when utilizing optomechanical lattices. Superconducting microwave optomechanical circuits are a promising platform to implement such lattices, but have been compounded by strict scaling limitations. Here, we overcome this challenge and demonstrate topological microwave modes in 1D circuit optomechanical chains realizing the Su-Schrieffer-Heeger (SSH) model. Furthermore, we realize the strained graphene model in a 2D optomechanical honeycomb lattice. Exploiting the embedded optomechanical interaction, we show that it is possible to directly measure the mode functions of the hybridized modes without using any local probe. This enables us to reconstruct the full underlying lattice Hamiltonian and directly measure the existing residual disorder. Such optomechanical lattices, accompanied by the measurement techniques introduced, offers an avenue to explore collective, quantum many-body, and quench dynamics, topological properties and more broadly, emergent nonlinear dynamics in complex optomechanical systems with a large number of degrees of freedoms. |
Friday, March 10, 2023 12:30PM - 12:42PM |
Z66.00006: Electro-optomechanical transduction using GHz-frequency silicon nanomechanics Han Zhao, Alkim Bozkurt, Mohammad Mirhosseini Connecting gigahertz electronics with optical fiber networks paves the foundation for high-speed communication infrastructures and future distributed quantum computation systems. Nanomechanics provides the ideal mediator that bridges the frequency gap on integrated platforms. Electro-optomechanical transducers have been realized with piezoelectric materials that not only require sophisticated nanofabrications, but also induce significant loss to phonons in the quantum regime. Here, we demonstrate an alternative approach of electro-optomechanical frequency conversion from 5-GHz microwave photons to telecom-band optical photons on the conventional monolithic silicon-on-insulator platform. The microwave input drives mechanical oscillations via the electrostatic force on a phononic crystal embedded into a charged narrow-gap capacitor, and imparts the resonance of a nanophotonic cavity by optomechanical coupling. We report a room-temperature microwave-to-optical conversion efficiency of 1.8×10-7 and estimate a microwave cavity-enhanced single-photon conversion efficiency exceeding 50% at mili-kelvin temperatures, benefiting from the long phonon lifetime. Our work opens the path to universal frequency conversion schemes that are independent of intrinsic piezoelectric or Pockels nonlinear materials, thus facilitates efficient interconnects between state-of-the-art silicon electronics and photonics. |
Friday, March 10, 2023 12:42PM - 12:54PM |
Z66.00007: Parity breaking effects in nonlinear dielectric media Sriram Ganeshan, Sudheesh Srivastava, Gustavo M Machado Monteiro In this work, we study the interplay between nonlinear and parity odd phenomena, in the context of light-matter systems. Nonlinear phenomena alone have been investigated in 1D dielectric systems such as Quadratic and Kerr media. For the Quadratic case, the presence of half-cycle-pulses is an example of these nonlinear effects, given that they can be described by solitons. |
Friday, March 10, 2023 12:54PM - 1:06PM |
Z66.00008: Coulomb-correlated few-electron states in a transmission electron microscope beam Rudolf Haindl, Armin Feist, Till Domröse, Marcel Möller, Sergey V Yalunin, Claus Ropers Correlations between electrons are ubiquitous in atomic, molecular, and solid-state systems. Observing such phenomena for free electrons requires a highly degenerate phase space density, readily available by femtosecond photoemission from nanotips [1,2], and benefits from the supreme beam control of electron microscopes [3]. However, ensemble-averaged detection usually prevents studying multi-particle correlations in free-electron beams. |
Friday, March 10, 2023 1:06PM - 1:18PM |
Z66.00009: Trion-polaritons in the Ultra-strong coupling regime Arturo Camacho-Guardian, Miguel A Bastarrachea-Magnani Trion-polaritons in two-dimensional semiconductors resulting from the hybridisation of charged excitons with cavity photons are a promising venue for the realization of strong polariton interactions and many-body phases of polaritons. Here, we study trion-polariton in the ultra-strong regime of the light-matter coupling. We develop a systematic theory that permits the simultaneous study of exciton-polaritons in the ultra-strong coupling regime and Feshbach physics. Our results and approach can pave the way for further studies and experiments of exciton-polaritons and Feshbach physics beyond the strong-coupling regime of light and matter. |
Friday, March 10, 2023 1:18PM - 1:30PM |
Z66.00010: Integrated THz emission and detection in thin-film lithium Alexa Herter |
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