Bulletin of the American Physical Society
APS April Meeting 2021
Volume 66, Number 5
Saturday–Tuesday, April 17–20, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session B07: Quantum-Enhanced Dark Matter SearchesInvited Live
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Sponsoring Units: GPMFC DAP Chair: Karl van Bibber, University of California at Berkeley |
Saturday, April 17, 2021 10:45AM - 11:21AM Live |
B07.00001: A Quantum-Enhanced Search for Dark Matter Axions Invited Speaker: Kelly Backes Almost a century after the dark matter problem was first posed, dark matter's minute experimental signature continues to elude direct detection. One hypothetical solution to this problem is the axion, a tiny particle of unknown mass and interaction strength that must be sought by scanning through frequency space. Quantum noise fundamentally limits the rate of this search. The Haloscope at Yale Sensitive to Axion Cold dark matter (HAYSTAC) [1] has now overcome this limit by using Josephson parametric amplifiers to manipulate squeezed quantum states [2], accelerating the search for axions by a factor of two. In this talk, I will discuss the use of squeezed quantum states to reduce detector noise to below the standard quantum limit and HAYSTAC’s newly published limit on axion parameter space [3]. These results demonstrate an unprecedented sub-quantum-limited search for new fundamental particles. [1] B. M. Brubaker et al, First Results from a Microwave Cavity Axion Search at 24 μeV, Phys. Rev. Lett. 118, 061392 (2017). [2] M. Malnou, D. A. Palken, B. M. Brubaker, Leila R. Vale, Gene C. Hilton, and K. W. Lehnert, Squeezed Vacuum Used to Accelerate the Search for a Weak Classical Signal, Phys. Rev. X 9, 021023 (2019). [3] K. M. Backes et al. A quantum-enhanced search for dark mat [Preview Abstract] |
Saturday, April 17, 2021 11:21AM - 11:57AM Live |
B07.00002: Advances in Qubit-Based Single-Photon Detection for Future Dark Matter Searches Invited Speaker: Rakshya Khatiwada A large parameter space for Dark Matter is occupied by Ultralight Dark Matter, including axions and hidden photons, all of which have enjoyed significant interest in recent years. Despite many existing direct and indirect experimental efforts probing the sub-eV region for these particles, much of the parameter space remains unexplored. This talk focuses on searches for microwave to mid-IR frequency Dark Matter, which have been inhibited by limited detection technologies; these limitations come mainly from a lack of methods with demonstrated single-photon resolution and sufficiently low dark-count rates to observe elusive single-photon Dark Matter signals. In this context, qubit-based single-photon detectors with low dark counts have emerged as a promising approach. We will discuss contemporary advances in developing these detectors, and report a recent proof-of-principle result obtained with one such technology. [Preview Abstract] |
Saturday, April 17, 2021 11:57AM - 12:33PM Live |
B07.00003: Accelerating dark matter searches using entangled microwave cavities Invited Speaker: Konrad Lehnert Recent experimental progress definitively establishes that quantum enhanced sensing can benefit a search for axionic dark matter. But for these methods to dramatically expand the reach of laboratory scale experiments, they must achieve much greater quantum enhancement. These quantum enhanced experiments use superconducting circuits to measure and manipulate the quantum state of the microwave cavities that couple to the hypothetical dark matter. And learning to use these circuits most effectively in dark matter searches is a new frontier of experiment design. In this talk, I describe a concept that uses simultaneous entanglement and state exchange between two microwave resonant modes to accelerate an axion dark matter search by a factor of 20 over the quantum limited value. The concept builds upon the squeezed state receiver recently deployed in the HAYSTAC apparatus, which demonstrated a doubling of the quantum limited scan rate, but overcomes its primary limitation. Importantly, the mode entanglement concept is no more complex to operate than the squeezed state receiver. Indeed, the design of dark matter search experiments should now compare the resources needed to enhance the dark matter signal to those required to suppress quantum noise. [Preview Abstract] |
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