Quantum sensing with duplex qubits of silicon vacancy centers in SiC at room temperature

• URL: http://arxiv.org/abs/2411.10208v1
• Date: Fri, 15 Nov 2024 14:13:04 GMT
• Title: Quantum sensing with duplex qubits of silicon vacancy centers in SiC at room temperature
• Authors: Kosuke Tahara, Shin-ichi Tamura, Haruko Toyama, Jotaro J. Nakane, Katsuhiro Kutsuki, Yuichi Yamazaki, Takeshi Ohshima,
• Abstract summary: The silicon vacancy center in Silicon Carbide (SiC) provides an optically addressable qubit at room temperature in its spin-$frac32$ electronic state. We propose a sensing scheme based on duplex qubit operation in the quartet, using microwave pulses with two resonant frequencies to simultaneously operate $left |+3/2rangle, |+1/2rangle right$ and $left |-1/2rangle, |-3/2rangle right$.
• Score: 1.8218298349840023
• License:
• Abstract: The silicon vacancy center in Silicon Carbide (SiC) provides an optically addressable qubit at room temperature in its spin-$\frac{3}{2}$ electronic state. However, optical spin initialization and readout are less efficient compared to those of spin-1 systems, such as nitrogen-vacancy centers in diamond, under non-resonant optical excitation. Spin-dependent fluorescence exhibits contrast only between $|m=\pm 3/2\rangle$ and $|m=\pm 1/2\rangle$ states, and optical pumping does not create a population difference between $|+1/2\rangle$ and $|-1/2\rangle$ states. Thus, operating one qubit (e.g., $\left\{|+3/2\rangle, |+1/2\rangle \right\}$ states) leaves the population in the remaining state ($|-1/2\rangle$) unaffected, contributing to background in optical readout. To mitigate this problem, we propose a sensing scheme based on duplex qubit operation in the quartet, using microwave pulses with two resonant frequencies to simultaneously operate $\left\{ |+3/2\rangle, |+1/2\rangle \right\}$ and $\left\{ |-1/2\rangle, |-3/2\rangle \right\}$. Experimental results demonstrate that this approach doubles signal contrast in optical readout and improves sensitivity in AC magnetometry compared to simplex operation.

Related papers

• Modular variable laser cooling for efficient entropy extraction [34.82692226532414]
  We show a method for laser cooling an oscillator based on sequences of spin-state-dependent displacements followed by spin repumps. We demonstrate the method experimentally using the internal and motional states of a single trapped ion.
  arXiv  Detail & Related papers  (2024-08-28T20:28:21Z)
• Photon Generation in Double Superconducting Cavities: Quantum Circuits Implementation [41.94295877935867]
  We studied photon generation due to the Dynamical Casimir Effect (DCE) in a one dimensional (1+1) double superconducting cavity. The total length of the double cavity $L$, the difference in length between the two cavities $Delta L$, and the electric susceptibility $chi$ are tunable parameters.
  arXiv  Detail & Related papers  (2024-07-19T14:33:45Z)
• Doppler-free three-photon spectroscopy on narrow-line optical transitions [0.0]
  coherent Doppler-free three-photon excitation of the $1S_0$$leftrightarrow$$3P_0$ optical clock transition and the $1S_0$$leftrightarrow$$3P_1$ intercombination transition in free-space thermal clouds of $88$Sr atoms.
  arXiv  Detail & Related papers  (2024-03-14T19:07:07Z)
• Dimension Independent Disentanglers from Unentanglement and Applications [55.86191108738564]
  We construct a dimension-independent k-partite disentangler (like) channel from bipartite unentangled input. We show that to capture NEXP, it suffices to have unentangled proofs of the form $| psi rangle = sqrta | sqrt1-a | psi_+ rangle where $| psi_+ rangle has non-negative amplitudes.
  arXiv  Detail & Related papers  (2024-02-23T12:22:03Z)
• Coherent all-optical control of a solid-state spin via a double $\Lambda$-system [0.0]
  All-optical control enables fast quantum operations on color center spins. Control via a double $Lambda$-system is applicable to other color centers and particularly, the group-IV defects in diamond.
  arXiv  Detail & Related papers  (2024-01-31T23:58:32Z)
• Microwave single-photon detection using a hybrid spin-optomechanical quantum interface [0.0]
  We propose a hybrid spin-optomechanical interface to detect single microwave photons. The microwave photons are coupled to a phononic resonator via piezoelectric actuation.
  arXiv  Detail & Related papers  (2024-01-19T02:00:38Z)
• The quantum beam splitter with many partially indistinguishable photons: multiphotonic interference and asymptotic classical correspondence [44.99833362998488]
  We present the analysis of the quantum two-port interferometer in the $n rightarrow infty$ limit of $n$ partially indistinguishable photons. Our main result is that the output distribution is dominated by the $O(sqrtn)$ channels around a certain $j*$ that depends on the degree of indistinguishability. The form is essentially the doubly-humped semi-classical envelope of the distribution that would arise from $2 j*$ indistinguishable photons, and which reproduces the corresponding classical intensity distribution.
  arXiv  Detail & Related papers  (2023-12-28T01:48:26Z)
• Cyclically operated Single Microwave Photon Counter with $10^\mathrm{-22}$ $\mathrm{W/\sqrt{Hz}}$ sensitivity [33.7054351451505]
  Single photon detection played an important role in the development of quantum optics. In recent years, significant progress has been made in developing single microwave photon detectors (SMPDs) based on superconducting quantum bits or bolometers. We present a practical SMPD based on the irreversible transfer of an incoming photon to the excited state of a transmon qubit by a four-wave mixing process.
  arXiv  Detail & Related papers  (2023-07-07T14:11:14Z)
• Ultrafast adiabatic passages in ultrastrongly coupled light-matter systems [5.574081332554501]
  We find a linear ultrafast adiabatic passage through $vert psirangle$ to fast generate arbitrary single-photon $M$-mode $W$ states. This work reveals the existence of linear ultrafast adiabatic passages in light-matter systems.
  arXiv  Detail & Related papers  (2022-07-02T08:36:02Z)
• Coherence of a dynamically decoupled single neutral atom [0.0]
  We experimentally study the implementation of dynamical decoupling on an optically-trapped, spin-polarized $87$Rb atom. We observe a strong correlation between the motional states of the atom and the qubit coherence after the refocusing.
  arXiv  Detail & Related papers  (2020-03-18T11:36:56Z)
• Anisotropy-mediated reentrant localization [62.997667081978825]
  We consider a 2d dipolar system, $d=2$, with the generalized dipole-dipole interaction $sim r-a$, and the power $a$ controlled experimentally in trapped-ion or Rydberg-atom systems. We show that the spatially homogeneous tilt $beta$ of the dipoles giving rise to the anisotropic dipole exchange leads to the non-trivial reentrant localization beyond the locator expansion.
  arXiv  Detail & Related papers  (2020-01-31T19:00:01Z)

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.