Analytical approximations to the dynamics of an array of coupled DC SQUIDs

Berggren, Susan; Palacios, Antonio Lozano

doi:10.1140/epjb/e2014-50065-9

Cited by 2 publications

(1 citation statement)

References 64 publications

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“…A lot of techniques have been implemented by various researchers to achieve the required power, which include utilizing magnetic tunnel junction in single STNO [18][19][20] and synchronizing arrays of STNOs to produce enhanced coherent microwave oscillations [21][22][23][24][25][26][27][28][29][30] . In addition to the above, it has been observed that an STNO with perpendicularly polarized pinned layer may drive an in-plane magnetization of free layer into an out-of-plane precessional state even in the absence of applied magnetic field 31,32 .…”

Section: Introductionmentioning

confidence: 99%

Frequency enhancement and power tunability in tilted polarizer spin-torque nano-oscillator

Arun

Gopal

Chandrasekar

et al. 2020

Journal of Applied Physics

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In the absence of an applied magnetic field, a spin-torque nano oscillator(STNO) with a tilted polarizer is studied using numerical simulation of the associated Landau-Lifshitz-Gilbert-Slonczewski equation. We find considerable enhancement of frequency by tilting the polarizer out-of-plane appropriately. Also, we observe improved tunability of frequency of oscillations from ∼15 GHz to ∼75 GHz and increment in the power spectral density by current and tilt angle. In addition, our findings and insights pave a simple way for nanoscale level microwave generators to be implemented.

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Section: Introductionmentioning

confidence: 99%

Frequency enhancement and power tunability in tilted polarizer spin-torque nano-oscillator

Arun

Gopal

Chandrasekar

et al. 2020

Journal of Applied Physics

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Fundamental principles, key enabling technologies, and research progress of atom chips

Li¹,

Chen²,

Luo³

et al. 2021

Acta Phys. Sin.

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The laser cooling, trapping and manipulating of neutral atoms has become a valuable tool for scientists, providing innovative ways to probe the nature of reality and giving rise to transformative devices in the fields of precise measurement and quantum information processing. Unlike traditional complex and bulky atomic experimental facilities, atom chips, through the design, fabrication of surface-patterned microstructures, and the integration of devices on the substrates, can precisely control the magnetic, electric or optical fields on a micro-nano scale with low power consumption. It can realize strong trapping as well as coherent atomic manipulation. Since atom chip was first proposed twenty years ago, it has built a robust quantum platform for miniaturizing and integrating quantum optics and atomic physics tools on a chip. In this paper, first, we briefly review the development history of atom chips, then introduce the basic knowledge of micro potential traps and micro guides based on on-chip current-carrying wires. Afterwards, the key technologies about the chip material, design, fabrication, characterization and integration of atom chips are discussed in detail. We not only focus on the currently most active and successful areas - current carrying wires, but also look at more visionary approaches such as to the manipulation of atoms with real nano structures, say, carbon nano tubes. The design and fabrication principles of ideal atom chips are discussed as well. In the forth part, the worldwide plans and research projects involving with atom chip technologies are summarized, showing that many countries see this as an important foundational technology. Following that, the major developments in the application fields including atom clocks, atom interferometer gyroscope, cold atom gravimeter, etc are described. Finally, the challenges faced by atom chips towards practical application are pointed out and the prospects for their subsequent development are depicted.

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Analytical approximations to the dynamics of an array of coupled DC SQUIDs

Cited by 2 publications

References 64 publications

Frequency enhancement and power tunability in tilted polarizer spin-torque nano-oscillator

Frequency enhancement and power tunability in tilted polarizer spin-torque nano-oscillator

Fundamental principles, key enabling technologies, and research progress of atom chips

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