Engineering field-insensitive molecular clock transitions for symmetry violation searches

• URL: http://arxiv.org/abs/2304.13817v3
• Date: Wed, 4 Oct 2023 00:35:43 GMT
• Title: Engineering field-insensitive molecular clock transitions for symmetry violation searches
• Authors: Yuiki Takahashi, Chi Zhang, Arian Jadbabaie, Nicholas R. Hutzler
• Abstract summary: We show that sensitivity to both external magnetic and electric fields can be simultaneously suppressed using engineered radio frequency, microwave, or two-photon transitions. The method is compatible with traditional Ramsey measurements, offers internal co-magnetometry, and is useful for systems with large angular momentum.
• Score: 2.5943586090617377
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Molecules are a powerful platform to probe fundamental symmetry violations beyond the Standard Model, as they offer both large amplification factors and robustness against systematic errors. As experimental sensitivities improve, it is important to develop new methods to suppress sensitivity to external electromagnetic fields, as limits on the ability to control these fields are a major experimental concern. Here we show that sensitivity to both external magnetic and electric fields can be simultaneously suppressed using engineered radio frequency, microwave, or two-photon transitions that maintain large amplification of CP-violating effects. By performing a clock measurement on these transitions, CP-violating observables including the electron electric dipole moment, nuclear Schiff moment, and magnetic quadrupole moment can be measured with suppression of external field sensitivity of $\gtrsim$100 generically, and even more in many cases. Furthermore, the method is compatible with traditional Ramsey measurements, offers internal co-magnetometry, and is useful for systems with large angular momentum commonly present in molecular searches for nuclear CP-violation.

Related papers

• Enhanced control of single-molecule emission frequency and spectral diffusion [0.0]
  Stark effect provides a powerful method to shift the spectra of molecules, atoms and electronic transitions in general. We provide experimental evidence of this trend, using molecular quantum emitters in the solid state cooled down to liquid helium. Based on the anisotropy of the molecule's polarizability, our two-dimensional control of the local electric field allows not only to tune the emitter's frequency but also to sensibly suppress the spectral instabilities associated to field fluctuations.
  arXiv  Detail & Related papers  (2024-09-03T12:40:40Z)
• Optimizing Off-Axis Fields for Two-Axis Magnetometry with Point Defects [0.08738116412366388]
  We demonstrate that careful optimization of the static bias field can enable simultaneous measurement of multiple magnetic field components. This work quantifies the trade-off between the increased frequency shift from second-order Zeeman effects with decreasing contrast as off-axis field components increase.
  arXiv  Detail & Related papers  (2024-04-15T12:50:15Z)
• A general approach to backaction-evading receivers with magnetomechanical and electromechanical sensors [0.0]
  Mechanical sensors are capable of detecting extremely weak perturbations while operating near the standard quantum limit. One of the ways to eliminate this noise is by measuring a quantum nondemolition variable such as the momentum in a free-particle system. Here, we propose and characterize theoretical models for direct velocity measurement that utilize traditional electric and magnetic transducer designs.
  arXiv  Detail & Related papers  (2023-11-16T05:51:55Z)
• Sensing of magnetic field effects in radical-pair reactions using a quantum sensor [50.591267188664666]
  Magnetic field effects (MFE) in certain chemical reactions have been well established in the last five decades. We employ elaborate and realistic models of radical-pairs, considering its coupling to the local spin environment and the sensor. For two model systems, we derive signals of MFE detectable even in the weak coupling regime between radical-pair and NV quantum sensor.
  arXiv  Detail & Related papers  (2022-09-28T12:56:15Z)
• A background-free optically levitated charge sensor [50.591267188664666]
  We introduce a new technique to model and eliminate dipole moment interactions limiting the performance of sensors employing levitated objects. As a demonstration, this is applied to the search for unknown charges of a magnitude much below that of an electron. As a by-product of the technique, the electromagnetic properties of the levitated objects can also be measured on an individual basis.
  arXiv  Detail & Related papers  (2021-12-20T08:16:28Z)
• Demonstration of electron-nuclear decoupling at a spin clock transition [54.088309058031705]
  Clock transitions protect molecular spin qubits from magnetic noise. linear coupling to nuclear degrees of freedom causes a modulation and decay of electronic coherence. An absence of quantum information leakage to the nuclear bath provides opportunities to characterize other decoherence sources.
  arXiv  Detail & Related papers  (2021-06-09T16:23:47Z)
• Controlled coherent dynamics of [VO(TPP)], a prototype molecular nuclear qudit with an electronic ancilla [50.002949299918136]
  We show that [VO(TPP)] (vanadyl tetraphenylporphyrinate) is a promising system suitable to implement quantum computation algorithms. It embeds an electronic spin 1/2 coupled through hyperfine interaction to a nuclear spin 7/2, both characterized by remarkable coherence.
  arXiv  Detail & Related papers  (2021-03-15T21:38:41Z)
• Chemical tuning of spin clock transitions in molecular monomers based on nuclear spin-free Ni(II) [52.259804540075514]
  We report the existence of a sizeable quantum tunnelling splitting between the two lowest electronic spin levels of mononuclear Ni complexes. The level anti-crossing, or magnetic clock transition, associated with this gap has been directly monitored by heat capacity experiments. The comparison of these results with those obtained for a Co derivative, for which tunnelling is forbidden by symmetry, shows that the clock transition leads to an effective suppression of intermolecular spin-spin interactions.
  arXiv  Detail & Related papers  (2021-03-04T13:31:40Z)
• Single-quadrature quantum magnetometry in cavity electromagnonics [0.0]
  Scheme of ultra-sensitive magnetometer in the cavity quantum electromagnonics is proposed. Intracavity microwave mode coupled to a magnonic mode via magnetic dipole interaction is proposed. The estimated theoretical sensitivity of the proposed magnetic amplifier-sensor is approximately in the order of $10-18T/sqrtHz$ which is competitive compared to the current state-of-the-art magnetometers.
  arXiv  Detail & Related papers  (2020-11-11T21:23:19Z)
• Quantum coherent spin-electric control in a molecular nanomagnet at clock transitions [57.50861918173065]
  Electrical control of spins at the nanoscale offers architectural advantages in spintronics. Recent demonstrations of electric-field (E-field) sensitivities in molecular spin materials are tantalising. E-field sensitivities reported so far are rather weak, prompting the question of how to design molecules with stronger spin-electric couplings.
  arXiv  Detail & Related papers  (2020-05-03T09:27:31Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.