Sensing of magnetic field effects in radical-pair reactions using a quantum sensor

• URL: http://arxiv.org/abs/2209.14066v1
• Date: Wed, 28 Sep 2022 12:56:15 GMT
• Title: Sensing of magnetic field effects in radical-pair reactions using a quantum sensor
• Authors: Deepak Khurana, Rasmus H. Jensen, Rakshyakar Giri, Juanita Bocquel, Ulrik L. Andersen, Kirstine Berg-S{\o}rensen, and Alexander Huck
• Abstract summary: 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.
• Score: 50.591267188664666
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Magnetic field effects (MFE) in certain chemical reactions have been well established in the last five decades and are attributed to the evolution of transient radical-pairs whose spin dynamics are determined by local and external magnetic fields. The majority of existing experimental techniques used to probe these reactions only provide ensemble averaged reaction parameters and spin chemistry, hindering the observation of the potential presence of quantum coherent phenomena at the single molecule scale. Here, considering a single nitrogen vacancy (NV) centre as quantum sensor, we investigate the prospects and requirements for detection of MFEs on the spin dynamics of radical-pairs at the scale of single and small ensemble of molecules. 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, and observe that the dynamics of certain populations, as well as coherence elements, of the density matrix of the radical pair are directly detectable. Our investigations will provide important guidelines for potential detection of spin chemistry of bio-molecules at the single molecule scale, required to witness the hypothesised importance of quantum coherence in biological processes.

Related papers

• Quantum theory of a potential biological magnetic field sensor: radical pair mechanism in flavin adenine dinucleotide biradicals [0.0]
  Recent studies suggest that flavin adenine dinucleotide (FAD) might be able to act as a biological magnetic field sensor. We develop a detailed quantum theoretical model for the radical pair mechanism ( RPM) for the flavin adenine biradical within the FAD molecule. Our model's predictions are consistent with experiments.
  arXiv  Detail & Related papers  (2024-06-18T22:40:10Z)
• All-Optical Nuclear Quantum Sensing using Nitrogen-Vacancy Centers in Diamond [52.77024349608834]
  Microwave or radio-frequency driving poses a significant limitation for miniaturization, energy-efficiency and non-invasiveness of quantum sensors. We overcome this limitation by demonstrating a purely optical approach to coherent quantum sensing. Our results pave the way for highly compact quantum sensors to be employed for magnetometry or gyroscopy applications.
  arXiv  Detail & Related papers  (2022-12-14T08:34:11Z)
• Dispersive readout of molecular spin qudits [68.8204255655161]
  We study the physics of a magnetic molecule described by a "giant" spin with multiple $d > 2$ spin states. We derive an expression for the output modes in the dispersive regime of operation. We find that the measurement of the cavity transmission allows to uniquely determine the spin state of the qudits.
  arXiv  Detail & Related papers  (2021-09-29T18:00:09Z)
• Magnon-magnon entanglement and its detection in a microwave cavity [0.0]
  Quantum magnonics is an emerging research field with great potential for applications in quantum information processing. We investigate antiferromagnets in which sublattices with ferromagnetic interactions can have two different magnon modes. We show how this may lead to experimentally detectable bipartite continuous variable magnon-magnon entanglement.
  arXiv  Detail & Related papers  (2021-06-12T20:46:55Z)
• 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)
• Basis-independent system-environment coherence is necessary to detect magnetic field direction in an avian-inspired quantum magnetic sensor [77.34726150561087]
  We consider an avian-inspired quantum magnetic sensor composed of two radicals with a third "scavenger" radical under the influence of a collisional environment. We show that basis-independent coherence, in which the initial system-environment state is non-maximally mixed, is necessary for optimal performance.
  arXiv  Detail & Related papers  (2020-11-30T17:19:17Z)
• 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)
• Quantum relative entropy shows singlet-triplet coherence is a resource in the radical-pair mechanism of biological magnetic sensing [0.0]
  Radical-pair reactions pertinent to biological magnetic field sensing are an ideal system for demonstrating the paradigm of quantum biology. We introduce and explore a formal measure quantifying singlet-triplet coherence of radical-pairs using the concept of quantum relative entropy.
  arXiv  Detail & Related papers  (2020-01-25T14:05:21Z)
• Quantum sensing and control of spin state dynamics in the radical pair mechanism [0.0]
  We analyze the role of a quantum sensor in detecting the spin dynamics of individual radical pairs in the presence of a weak magnetic field. We show how quantum control methods can be used to set apart the dynamics of radical pair mechanism at various stages of the evolution.
  arXiv  Detail & Related papers  (2020-01-06T12:24:16Z)

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.