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All-optical scheme for detecting the possible Majorana signature based on QD and nanomechanical resonator systems

Science China(Physics,Mechanics & Astronomy) 2015年第5期58卷 2-15页

作者： CHEN HuaJun ZHU KaDi Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education) Department of Physics and Astronomy Shanghai Jiao Tong University

Majorana fermions(MFs) are exotic particles that are their own anti-particles. Currently, the search for MFs occurring as quasiparticle excitations in condensed matter systems has attracted widespread interest, because of their importance in fundamental physics and potential applications in topological quantum computation based on solid-state devices. Motivated by recent experimental progress towards the detection and manipulation of MFs in hybrid semiconductor/superconductor heterostructures, in this review, we present a novel proposal to probe MFs in all-optical domain. We introduce a single quantum dot(QD), a hybrid quantum dot-nanomechanical resonators(QD-NR) system, and a carbon nanotube(CNT) resonator implanted in a single electron spin system with optical pump-probe technology to detect MFs, respectively. With this scheme, a possible Majorana signature is investigated via the probe absorption spectrum and nonlinear optical Kerr effect, and the coupling strength between MFs and the QD or the single electron spin is also determined. In the hybrid QD-NR system, vibration of the NR will enhance the nonlinear optical effect, which makes the MFs more sensitive for detection. In the CNT resonator with a single electron, the single electron spin can be considered as a sensitive probe, and the CNT resonator behaved as a phonon cavity is robust for detecting of MFs. This optical scheme will provide another method for the detection MFs and will open the door for new applications ranging from robust manipulation of MFs to quantum information processing based on MFs.

关键词： Majorana fermions QD nanomechanical resonator carbon nanotube resonator optical pump-probe technology

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Bell States and Two-Qubit Logic Gate with Superconducting Charge Qubits Coupling to a nanomechanical resonator

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Communications in Theoretical Physics 2007年第12期48卷 999-1002页

作者： LIAO Jie-Qiao~1 and WANG Xin-Wen~(2,3)~1 Department of Physics,Hunan Normal University,Changsha 410081,China~2 Department of Physics,Beijing Normal University,Beijing 100875,China~3 Department of Electronic Engineering and Physics,Hunan University of Science and Engineering,Yongzhou 425100,China Department of Physics Hunan Normal University Changsha 410081 China Department of Physics Beijing Normal University Beijing 100875 China Department of Electronic Engineering and Physics Hunan University of Science and Engineering Yongzhou 425100 China

We propose a scheme for generating Bell states involving two SQUID-based charge qubits by coupling themto a nanomechanical *** also show that it is possible to implement a two-qubit logic gate between the twocharge qu... 详细信息

关键词： Bell states superconducting charge qubit two-qubit logic gate nanomechanical resonator

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Room temperature nonlinear mass sensing based on a hybrid spin-nanoresonator system

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Chinese Physics B 2020年第10期29卷 501-506页

作者： Jian-Yong Yang Hua-Jun Chen School of Mechanics and Photoelectric Physics Anhui University of Science and TechnologyHuainan 232001China

We present a room temperature nonlinear mass sensing based on a hybrid spin-nanoresonator system with the microwave pump–probe technique and the spin readout technique, which includes a single spin of nitrogen–vacancy (NV) center in diamond and a nanomechanical cantilever. The resonance frequency of the nanoresonator can be measured with the nolinear Kerr spectrum, and the parameters that influence the nolinear Kerr spectrum are also investigated. Further, according to the relationship between frequency shifts and variable mass attached on the nanoresonator, this system can also be used to detect the mass of DNA molecules with the nolinear Kerr spectrum. Benefiting from the single spin of the NV center in diamond has a long coherence time at 300 K, the hybrid system can realize room temperature mass sensor, and the mass response rate can reach 2600 zg/Hz.

关键词： nonlinear mass sensing nitrogen-vacancy center nanomechanical resonator

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Stressed carbon nanotube devices for high tunability,high quality factor, single mode GHz resonators

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Nano Research 2018年第11期11卷 5812-5822页

作者： Xinhe Wang Dong Zhu Xinhe Yang Long Yuan Haiou Li Jiangtao Wang Mo Chen Guangwei Deng Wenjie Liang Qunqing Li Shoushan Fan Guoping Guo Kaili Jiang State Key Laboratory of Low-Dimensional Quantum Physics Dept. of Physics and Tsinghua-Foxconn Nanotechnology Research Center Tsinghua University Beijing 100084 China Key Laboratory of Quantum Information CAS University of Science and Technology of China Hefei230026 China Institute of Physics Chinese Academy of Sciences Beijing 100080 China Fert Beijing Research Institute School of Electrical and Information Engineering BDBC Beihang University Beijing I O019 I China Collaborative Innovation Center of Ouantum Matter Beijing 100084 China

The emerging applications of nanoelectromechanical systems (NEMS) in ground-state cooling, quantum manipulation, communication devices, etc., call for a nanoresonator with high frequency, quality factor, and tunability, as well as easy integration. Here we show that such a nanoresonator can be achieved by using a unique assembly technique that transfers the stressed inner shell of carbon nanotubes (CNTs) to a self-aligned device geometry. The as-fabricated nanoresonator shows excellent comprehensive performance, i.e., high frequency (2–3 GHz), high tunability (80–110 MHz/V), high quality factor (3 × 104), and single mode operation. The defect-free nature of the inner shell of the CNT gives rise to a high quality factor, and the preloaded tension improves the resonant frequency and tunability. This resonator with excellent performance also enables the integration of homogeneous devices and will play a key role in the emerging applications of NEMS.

关键词： carbon nanotube nanomechanical resonator stress high tunability high frequency

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Monolayer-molybdenum-disulfide-based nano-optomechanical transistor and tunable nonlinear responses

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Journal of Semiconductors 2016年第11期37卷 43-49页

作者：陈华俊陈昌兆李洋方贤文 School of Science Anhui University of Science and Technology

Atomically thin two-dimensional semiconductor nanomaterials have attained considerable attention currently. Here, we present a nano-optomechanical system based on a suspended monolayer molybdenum disulfide （MoS2）. The linear and nonlinear coherent optical properties of this system, and the phenomenon ofphonon-induced transparency are demonstrated. The transmission of the probe field can be manipulated by the power of a second ‘gating＇（pump） field, which indicates a promising candidate for an optical transistor. We further study the nonlinear effect of the system, and the optical Kerr effect of the monolayer MoS2 resonator can be regulated under different parameter regimes. This scheme proposed here may indicate potential chip-scale applications of monolayer MoS2 resonator in quantum information with the currently popular pump-probe technology.

关键词： MoS2 nanomechanical resonator optical transistor nonlinear optical effect

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Manipulation of Coherent Optical Propagation Based on Monolayer MoS2 resonator

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Photonic Sensors 2019年第4期9卷 317-326页

作者： Huajun CHEN School of Mechanics and Photoelectric Physics Anhui University of Science and TechnologyHuainan 232001China

Atomically thin two-dimensional semiconductor nanomaterials have attained considerable attention *** here theoretically investigate the phenomena of slow and superluminal light based on the MoS2 resonator system driven by two-tone *** and ultraslow probe light without absorption can be obtained via manipulating the pump laser on-and off-resonant with the exciton frequency under different parameters regimes,respectively,of which the magnitude is larger than that in a carbon nanotube *** bandwidth of the probe spectrum determined by the quality factor Q of MoS2 resonator is also ***,we also demonstrate the phenomenon of phonon induced transparency and show an optical transistor in the *** all-optical device based on MoS2 resonator may indicate potential chip-scale applications in quantum information with the currently popular pump-probe technology.

关键词： MoS2 nanomechanical resonator fast and slow light optical transistor

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