Bulletin of the American Physical Society
APS April Meeting 2022
Volume 67, Number 6
Saturday–Tuesday, April 9–12, 2022; New York
Session S08: Mini-symposium: Quantum Sensors and Computing IMini-Symposium Recordings Available
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Sponsoring Units: DPF Chair: Todd Adams, Florida State University Room: Juilliard |
Monday, April 11, 2022 1:30PM - 1:54PM |
S08.00001: Emerging Atomic, Molecular, and Optical Quantum Sensor Technologies for Probing High Energy Physics Invited Speaker: Tim Kovachy Emerging advances in quantum sensors based on atomic, molecular, and optical platforms offer the potential to contribute to multiple areas at the forefront of high energy physics. Key developments include the extension of quantum coherence and quantum control to new systems and to unprecedented scales in mass, space, and time; new techniques for achieving precision beyond the standard quantum limit; and networks of many quantum sensors. In this talk, I will present an overview of these developments and discuss some of their potential impacts on high energy physics. Specifically, I will describe efforts to apply quantum sensors to searches for the QCD axion and for general wavelike dark matter, to gravitational wave detection in currently unexplored frequency ranges which are promising for probing the high energy scales of the early universe, and to precise tests of the standard model. |
Monday, April 11, 2022 1:54PM - 2:18PM |
S08.00002: Applications of Quantum Sensing to Probe High Energy Physics Invited Speaker: Surjeet Rajendran The field of high energy physics has typically operated under the assumption that new physics must exist at high energies with reasonably strong interactions with the standard model. However, many of the concrete examples of new physics such as dark matter and dark energy suggest that the new physics exists in a form that interacts feebly with the standard model. The revolutionary advances in quantum sensing over the past few decades has now made it possible to probe the effects of new physics that require extreme precision. In this talk, I will highlight opportunities to probe the dark sector with quantum sensors. |
Monday, April 11, 2022 2:18PM - 2:30PM |
S08.00003: Searching For Axion Dark Matter with the South Pole Telescope Kyle Ferguson Axions and other axion-like particles (ALPs) remain compelling dark matter candidates with a wealth of possible detection methods. A photon traveling through an axion field will experience a rotation in its polarization proportional to the difference in the axion field value at photon emission and photon absorption. Thus the apparent polarization of a static astrophysical source will oscillate in time as the local axion dark matter field oscillates (with a frequency proportional to the axion mass). The cosmic microwave background (CMB) is polarized, well-studied, and extremely static, making it an ideal source with which to search for this effect. We present the results of such a search for ultra-light ALPs with masses roughly between $10^{−21}$ and $10^{−19}$ eV using data from the 2019 observing season of the South Pole Telescope (SPT), a millimeter-band telescope with arcminute resolution that is located at the geographic South Pole and designed to observe the CMB. |
Monday, April 11, 2022 2:30PM - 2:42PM |
S08.00004: Dissecting Axions Around Supermassive Black Holes with Birefringence Zihan Zhou, Yifan Chen, Chunlong Li, Yosuke Mizuno, Jing Shu, Xiao Xue, Yue Zhao With the upcoming project of the next-generation Event Horizon Telescope, the search for gravitational atoms made up of axions around supermassive black holes has become more and more promising. This new searching method makes use of the birefringence effect from the axion-photon coupling where a frequency-independent oscillation to the electric vector position angle of the linearly polarized radiation is predicted. The birefringent signals are influenced by the washout effects from the finite thickness of the accretion flow and the contribution from the lensed photons. In this talk, I will discuss the axion-induced birefringence for different cases of the black hole and accretion flow, including the impact of black hole inclination angles, spins and magnetic field, velocity distribution, the thickness of accretion flow, and finally I will give prospects on how future observations can remove these effects. |
Monday, April 11, 2022 2:42PM - 2:54PM |
S08.00005: Timescale of axion condensation in miniclusters Anthony Mirasola Axions and other scalar dark matter in gravitationally bound miniclusters are expected to condense into solitons, which are in the Bose-Einstein condensate phase. This process has been shown to occur either through attractive self-interactions of the axion-like particles or through the field's self gravitation. We derive kinetic equations valid for both these interactions in the high-occupancy regime of scalar dark matter. We use this formalism to compute relaxation times for the Bose-Einstein condensation, and find that condensation into Bose stars could occur within the lifetime of the universe. The self-interactions reduce the condensation time only when they are very strong. |
Monday, April 11, 2022 2:54PM - 3:06PM |
S08.00006: Remote entanglement of microwave cavities for enhanced scan rate in axion dark matter searches Elizabeth P Ruddy, Yue JIANG, Kyle Quinlan, Kelly Wurtz, Benjamin M Brubaker, Daniel A Palken, Maxime Malnou, Konrad Lehnert The key figure of merit for cavity-based axion dark matter searches is the rate at which detectors can scan the vast parameter space made up of the particle’s unknown mass and coupling strength. Squeezed vacuum states have recently been used to circumvent the quantum limit, doubling the scan rate by widening the visibility bandwidth over that of the quantum-limited approach. We propose a method of further scan rate enhancement based on parametric coupling of an axion-sensitive cavity with an auxiliary readout circuit. By modulating the coupling at the difference and sum frequencies of the two cavity modes, we induce simultaneous two-mode squeezing (entangling) and state swapping interactions, resulting in amplification of an axion signal before it becomes polluted by vacuum noise introduced by measurement. Theoretical models of this system predict a 15-fold improvement in scan rate [1]. Here, we present the theoretical background for the technique as well as circuit simulation results. |
Monday, April 11, 2022 3:06PM - 3:18PM |
S08.00007: Experimental test of entanglement and swapping protocol for quantum enhanced visibility bandwidth Kyle Quinlan, Elizabeth P Ruddy, Yue Jiang, Kelly Wurtz, Benjamin M Brubaker, Daniel A Palken, Maxime Malnou, Konrad Lehnert Cavity-based axion detectors exploit the axion field's hypothesized coupling to electromagnetism to sweep through possible masses looking for a weak, narrowband signal. Even with techniques to circumvent the standard quantum limit, the spectral scan rate of these detectors is severely limited, making the search for axions prohibitively resource intensive with current technology. Here we present experimental progress towards a method of scan rate enhancement based on the parametric coupling of an axion-sensitive cavity to an auxiliary readout mode. Using a Josephson Ring Modulator (JRM) as a 3-wave mixing element, we induce simultaneous squeezing and state swapping interactions between two on chip resonant circuits that result in amplification of a potential hidden photon signal relative to measurement noise. In this talk, I will describe results from a proof-of-concept demonstration. |
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