Slit-loaded coplanar waveguide for color-center spin qubits
- URL: http://arxiv.org/abs/2506.16128v1
- Date: Thu, 19 Jun 2025 08:26:27 GMT
- Title: Slit-loaded coplanar waveguide for color-center spin qubits
- Authors: Haruko Toyama, Kosuke Tahara, Taro Ikeda, Hiroya Tanaka, Atsushi Miura, Shin-ichi Tamura, Maria Emma Villamin, Toshinori Numata, Naotaka Iwata, Yuichi Yamazaki, Takeshi Ohshima, Katsuhiro Kutsuki, Hideo Iizuka,
- Abstract summary: Spin qubits of color centers are extensively investigated for quantum sensing, communication, and information processing.<n>It is challenging to effectively irradiate both lasers and microwaves onto color centers using small footprint microwave waveguides or antennas.<n>We experimentally show that by introducing a compact coplanar waveguide with a thin slit in its signal line, effective irradiation of both lasers and microwaves is enabled.
- Score: 3.118338843286328
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The spin qubits of color centers are extensively investigated for quantum sensing, communication, and information processing, with their states generally controlled using lasers and microwaves. However, it is challenging to effectively irradiate both lasers and microwaves onto color centers using small footprint microwave waveguides or antennas that are compatible with semiconductor devices. We experimentally show that by introducing a compact coplanar waveguide with a thin slit in its signal line, effective irradiation of both lasers and microwaves is enabled, allowing spin-state control of color centers created around the slit. Microwave magnetic fields parallel to the surface, intrinsically generated by a standard coplanar waveguide, persist even after loading the slit, which is necessary to control the color centers whose spin quantization axes are oriented perpendicular to the surface, while laser light for the initialization and readout of spin states can access the color centers through the slit. Continuous and pulsed optically detected magnetic resonance measurements are performed for the silicon vacancies ($\mathrm{V_{Si}}$) in silicon carbide 4H-SiC(0001). Experimental results indicate that the spin states of $\mathrm{V_{Si}}$ are effectively controlled by the microwave magnetic fields parallel to the surface, which agrees with numerical results from electromagnetic field simulations. Our small footprint waveguide is suitable for integrating color-center-based quantum sensors into semiconductor electronic devices and other small-scale systems.
Related papers
- Isofrequency spin-wave imaging using color center magnetometry for magnon spintronics [0.0]
Magnon spintronics aims to harness spin waves in magnetic films for information technologies.<n> color center magnetometry is a promising tool for imaging spin waves, using electronic spins associated with atomic defects in solid-state materials as sensors.
arXiv Detail & Related papers (2025-08-26T07:59:44Z) - Spectral tuning and nanoscale localization of single color centers in silicon via controllable strain [33.7054351451505]
Large-scale integration requires precise control of each emitter's optical transition to generate indistinguishable photons for quantum networking.<n>Here, we demonstrate a foundry-fabricated photonic integrated circuit (PIC) combining suspended silicon waveguides with a microelectromechanical (MEMS) cantilever.<n>Applying up to 35 V between the cantilever and the substrate induces a reversible wavelength shift of the zero-phonon line exceeding 100 pm, with no loss in brightness.
arXiv Detail & Related papers (2025-01-28T20:45:08Z) - Chiral cavity-magnonic system for the unidirectional emission of a
tunable squeezed microwave field [0.0]
The unidirectional emission of a tunable squeezed microwave field can be generated via the assistance of the dissipative magnon mode and a waveguide.
Our work opens up an avenue to create and manipulate one-way nonclassical microwave radiation field and could find potential quantum technological applications.
arXiv Detail & Related papers (2023-08-30T08:02:16Z) - 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) - Measuring the magnon-photon coupling in shaped ferromagnets: tuning of
the resonance frequency [50.591267188664666]
cavity photons and ferromagnetic spins excitations can exchange information coherently in hybrid architectures.
Speed enhancement is usually achieved by optimizing the geometry of the electromagnetic cavity.
We show that the geometry of the ferromagnet plays also an important role, by setting the fundamental frequency of the magnonic resonator.
arXiv Detail & Related papers (2022-07-08T11:28:31Z) - Slowing down light in a qubit metamaterial [98.00295925462214]
superconducting circuits in the microwave domain still lack such devices.
We demonstrate slowing down electromagnetic waves in a superconducting metamaterial composed of eight qubits coupled to a common waveguide.
Our findings demonstrate high flexibility of superconducting circuits to realize custom band structures.
arXiv Detail & Related papers (2022-02-14T20:55:10Z) - Electrical readout microwave-free sensing with diamond [0.0]
Photoelectric readout of ground-state cross-relaxation features serves as a method for measuring electron spin resonance spectra of nanoscale electronic environments.
This approach may offer potential solutions for determining spin densities and characterizing local environment.
arXiv Detail & Related papers (2022-01-05T19:40:10Z) - Near-Field Terahertz Nanoscopy of Coplanar Microwave Resonators [61.035185179008224]
Superconducting quantum circuits are one of the leading quantum computing platforms.
To advance superconducting quantum computing to a point of practical importance, it is critical to identify and address material imperfections that lead to decoherence.
Here, we use terahertz Scanning Near-field Optical Microscopy to probe the local dielectric properties and carrier concentrations of wet-etched aluminum resonators on silicon.
arXiv Detail & Related papers (2021-06-24T11:06:34Z) - A low-loss ferrite circulator as a tunable chiral quantum system [108.66477491099887]
We demonstrate a low-loss waveguide circulator constructed with single-crystalline yttrium iron garnet (YIG) in a 3D cavity.
We show the coherent coupling of its chiral internal modes with integrated superconducting niobium cavities.
We also probe experimentally the effective non-Hermitian dynamics of this system and its effective non-reciprocal eigenmodes.
arXiv Detail & Related papers (2021-06-21T17:34:02Z) - Detecting spins with a microwave photon counter [0.0]
We demonstrate the detection of a small ensemble of donor spins in silicon by their fluorescence at microwave frequency and millikelvin temperatures.
We discuss the potential of fluorescence detection as a novel method for magnetic resonance spectroscopy of small numbers of spins.
arXiv Detail & Related papers (2021-02-02T10:12:48Z) - Hybrid microwave-optical scanning probe for addressing solid-state spins
in nanophotonic cavities [0.0]
In this work, we demonstrate a fiber-based scanning probe that simultaneously couples light into a planar photonic circuit.
The optical portion 46% achieves one-way coupling efficiency, while the microwave portion supplies an AC magnetic field with strength up to 9 Gauss.
The entire probe can be scanned across a large number of devices inside a $3$He cryostat without free-space optical access.
arXiv Detail & Related papers (2020-12-11T01:59:53Z) - Waveguide Bandgap Engineering with an Array of Superconducting Qubits [101.18253437732933]
We experimentally study a metamaterial made of eight superconducting transmon qubits with local frequency control.
We observe the formation of super- and subradiant states, as well as the emergence of a polaritonic bandgap.
The circuit of this work extends experiments with one and two qubits towards a full-blown quantum metamaterial.
arXiv Detail & Related papers (2020-06-05T09:27:53Z)
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.