Bulletin of the American Physical Society
54th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 68, Number 7
Monday–Friday, June 5–9, 2023; Spokane, Washington
Session M10: Quantum Sensors |
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Chair: John Bollinger, NIST Room: 207 |
Wednesday, June 7, 2023 2:00PM - 2:12PM |
M10.00001: Nanoscale cryogenic thermometry via electron-phonon interaction in a dual quantum dot setup Anamika Barman, Aniket Singha Nanoscale cryogenic thermometry has gained particular concern owing to the rising demand for a few Kelvin applications. Temperature-controlled electronic transport is employed in nanoscale thermoelectric engines, refrigerators, transistors, and rectifiers. Similarly, electronic thermometry can be achieved via temperature-induced controlled electron flow. Here, we adopt a novel cryogenic thermometer setup compiled with an array of dual quantum dots. These dots share a stair-like ground state configuration triggering inelastic process-assisted tunneling in the system. The phonon scattering phenomenon gives rise to temperature-controlled thermometry in the setup. Further, we performed the thermometry analysis with the quantum master equation (QME) approach in a sequential tunneling limit. The analysis shows that the setup can manifest maximum temperature sensitivity and efficiency in the low temperature (a few Kelvin) regimes. Therefore, this dual quantum dot structure may become suitable for future realistic cryogenic thermometers coupled with high-performance temperature sensors at the nanoscale. |
Wednesday, June 7, 2023 2:12PM - 2:24PM |
M10.00002: Hybridizing an atom and optical interferometer with a common inertial reference for precision quantum sensing Ashwin Rajagopalan, Ernst Rasel, Sven Abend, Dennis Schlippert Quantum inertial sensors based on atom interferometry have demonstrated incredible potential for high precision and reliable measurements of inertial effects for real world applications. Vibrational noise is the most prominent noise source that hinders its measurement sensitivity apart from introducing ambiguities. We have successfully demonstrated using a small opto-mechanical resonator on a T = 10 ms atom interferometer [1] which resolves measurement ambiguity and measures the local gravitational acceleration with an uncertainty of 4 × 10-6 ms-2 after an integration time of 18000 seconds. We have taken the next step of fully integrating an accelerometer which comprises a harmonic mechanical oscillator and a Fabry–Pérot interferometer with the inertial reference mirror of the atom interferometer aiming for higher accuracy hybridization. Therefore, both the atom and optical interferometers measure acceleration with respect to the same inertial reference which is the test mass of the mechanical oscillator. High reflectivity coating for the optical interferometer enhances its sensitivity which will enable hybridization with highly sensitive atom interferometers. |
Wednesday, June 7, 2023 2:24PM - 2:36PM |
M10.00003: Joint quantum estimation of loss and nonlinearity in driven-dissipative Kerr resonators Berihu T Gebrehiwot, Muhammad Asjad, Matteo Paris We address multiparameter quantum estimation for coherently driven nonlinear Kerr resonators in the presence of loss. In particular, we consider the realistic situation in which the parameters of interest are the loss rate and the nonlinear coupling, whereas the amplitude of the coherent driving is known and externally tunable. Our results show that this driven dissipative model is asymptotically classical, i.e. the Uhlmann curvature vanishes, and the two parameters may be jointly estimated without any additional noise of quantum origin. We also find that the ultimate bound to precision, as quantified by the quantum Fisher information (QFI), increases with the interaction time and the driving amplitude for both parameters. Finally, we investigate the performance of quadrature detection, and show that for both parameters the Fisher information oscillates in time, repeatedly approaching the corresponding QFI |
Wednesday, June 7, 2023 2:36PM - 2:48PM |
M10.00004: Supersensitive quantum sensing jointly enhanced by PT symmetry and entanglement in a spin-boson system Jianming Wen, Pei-Rong Han, Fan Wu, Xin-Jie Huang, Zhen-Biao Yang, Shi-Biao Zheng Extension of the Hamiltonian dynamics from Hermitian to non-Hermitian domain has significantly pushed forward physical sciences, and offered promising possibilities for cutting-edge technologies. Recent years have witnessed many achievements in exploring non-Hermitian (NH) physics and related technological applications, but mainly restricted to classical (non-entangled) cases. Several impressive progresses have been achieved for demonstrating semiclassical NH models with a single qubit driven by a classical field, but a realization at the fully quantum-mechanical level is still lacking, although which is indispensible for understanding ubiquitous NH quantum phenomena and for relevant quantum technological applications. We here study both theoretically and experimentally the non-Hermitian physics of a fully quantum light-matter system, composed of a superconducting qubit coupled to a microwave resonator, as well as to an artificial reservoir. We uncover an entanglement singular behavior at the exceptional point, where the concurrence in each eigenvector exhibits a discontinuous derivative. This unique light-matter entanglement transition is confirmed by quantum state tomography. We further demonstrate a sensing scheme, where the signal is encoded in the NH entanglement, which promises an improved sensitivity and a stronger robustness against some local noises compared to population-encoded sensing scenarios. |
Wednesday, June 7, 2023 2:48PM - 3:00PM |
M10.00005: The impact of microwave phase noise on diamond quantum sensing Andris Berzins, Maziar Saleh Ziabari, Janis Smits, Yaser Silani, Ilja Fescenko, Joshua Damron, Andrey Jarmola, Pauli Kehayias, Bryan A Richards, Victor Acosta Precision measurements of the electron-spin precession of nitrogen-vacancy (NV) centers in diamond form the basis of numerous applications. The ultimate limits in precision are fundamental and cannot be avoided (e.g., due to spin-projection shot noise), but some sources of noise are due to experimental imperfections that could in principle be eliminated or at least mitigated. One example is microwave phase noise [1]. From the perspective of pulsed electron-spin measurements, noise due to random fluctuations of the phase of the waveform rotate the spins away from the desired axis and, left unmitigated, are indistinguishable from magnetic field noise. Phase noise is always present at some level because of the limited clock precision in microwave signal generators. It is particularly a challenge for applications that require large magnetic fields, such as nuclear magnetic resonance spectroscopy [2] because a higher microwave frequency translates timing errors into larger phase fluctuations and could significantly lower the achievable sensitivity. We will present research that confirms the effect of phase noise in pulsed electron-spin measurements, quantifies the phase noise as a function of frequency for several commonly-used commercial microwave signal generators, and presents solutions to mitigate the phase noise effects. |
Wednesday, June 7, 2023 3:00PM - 3:12PM |
M10.00006: Learning response functions: a data-driven framework for quantum sensing. Cinthia Huerta Alderete, Max Hunter Gordon, Frédéric Sauvage, Akira Sone, Andrew T Sornborger, Patrick J Coles, Marco Cerezo Quantum Sensing (QS) is a blossoming field of research and a key use case for practical quantum technologies. In standard QS tasks one aims at estimating an unknown parameter encoded into an n-qubit probe state, via measurements of the system. |
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