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Novel quantum secret image-sharing scheme

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Chinese Physics B 2019年第4期28卷 61-69页

作者： Gao-Feng Luo Ri-Gui Zhou Wen-Wen Hu College of information Engineering Shanghai Maritime University College of information Engineering Shaoyang University Research Center of Intelligent information processing and quantum Intelligent Computing

In this paper, we propose a novel quantum secret image-sharing scheme which constructs m quantum secret images into m+1 quantum share images. A chaotic image generated by the logistic map is utilized to assist in the construction of quantum share images first. The chaotic image and secret images are expressed as quantum image representation by using the novel enhanced quantum representation. To enhance the confidentiality, quantum secret images are scrambled into disordered images through the Arnold transform. Then the quantum share images are constructed by performing a series of quantum swap operations and quantum controlled-NOT operations. Because all quantum operations are invertible, the original quantum secret images can be reconstructed by performing a series of inverse operations. Theoretical analysis and numerical simulation proved both the security and low computational complexity of the scheme, which has outperformed its classical counterparts. It also provides quantum circuits for sharing and recovery processes.

关键词： quantum image processing secret image sharing quantum computation quantum circuit

Algebraic and group treatments to nonlinear displaced number states and their nonclassicality features:A new approach

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Chinese Physics B 2015年第6期24卷 334-340页

作者： N Asili Firouzabadi M K Tavassoly M J Faghihi Atomic and Molecular Group Faculty of PhysicsYazd University The laboratory of quantum information processing Yazd University Physics and Photonics Department Graduate University of Advanced Technology

Recently, nonlinear displaced number states （NDNSs） have been manually introduced, in which the deformation function f（n） has been artificially added to the previously well-known displaced number states （DNSs）. Indeed, just a simple comparison has been performed between the standard coherent state and nonlinear coherent state for the formation of NDNSs. In the present paper, after expressing enough physical motivation of our procedure, four distinct classes of NDNSs are presented by applying algebraic and group treatments. To achieve this purpose, by considering the DNSs and recalling the nonlinear coherent states formalism, the NDNSs are logically defined through an algebraic consideration. In addition, by using a particular class of Gilmore-Perelomov-type of SU（1,1） and a class of SU（2） coherent states, the NDNSs are introduced via group-theoretical approach. Then, in order to examine the nonclassical behavior of these states, sub-Poissonian statistics by evaluating Mandel parameter and Wigner quasi-probability distribution function associated with the obtained NDNSs are discussed, in detail.

关键词： displaced number state nonlinear coherent state Wigner function nonclassical state

Experimental observation of spontaneous symmetry breaking in a quantum phase transition

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Science China(Physics,Mechanics & Astronomy) 2024年第2期67卷 34-39页

作者： Wen Ning Ri-Hua Zheng Jia-Hao Lu Fan Wu Zhen-Biao Yang Shi-Biao Zheng Fujian Key laboratory of quantum information and quantum Optics College of Physics and Information EngineeringFuzhou UniversityFuzhou 350108China Hefei National laboratory Hefei 230088China

Spontaneous symmetry breaking(SSB)plays a central role in understanding a large variety of phenomena associated with phase transitions,such as superfluid and *** far,the transition from a symmetric vacuum to a macroscopically ordered phase has been substantially *** process bridging these two distinct phases is critical to understanding how a classical world emerges from a quantum phase transition,but so far remains unexplored in *** here report an experimental demonstration of such a process with a quantum Rabi model engineered with a superconducting *** move the system from the normal phase to the superradiant phase featuring two symmetry-breaking field components,one of which is observed to emerge as the classical *** results demonstrate that the environment-induced decoherence plays a critical role in the SSB.

关键词： quantum phase transition Rabi model spontaneous symmetry breaking superconducting circuit Schrodinger cat states

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Dynamical Casimir effect in dissipative superconducting circuit system

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Science China(Physics,Mechanics & Astronomy) 2014年第12期57卷 2251-2258页

作者： ZHANG Yu Na LUO Xi Wang ZHOU Zheng Wei Key laboratory of quantum information University of Science and Technology of China Synergetic Innovation Center of quantum information and quantum Physics University of Science and Technology of China

We investigate the possibility of observing in integrated solid-state systems the dynamical Casimir effect,in which photons are created out of *** use a transmission line resonator on a superconducting chip as the microwave cavity and modulate its properties by coupling it to carefully designed Josephson *** evaluate the effect of main decoherence sources and show that our design offers a promising system for experimentally demonstrating the dynamical Casimir ***,we also study the squeezing properties of the created photon field and how they depend on the dissipation.

关键词： dynamical Casimir effect superconducting circuit system dissipation squeezing

DNA computing for combinational logic

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Science China(information Sciences) 2019年第6期62卷 5-20页

作者： Chuan ZHANG Lulu GE Yuchen ZHUANG Ziyuan SHEN Zhiwei ZHONG Zaichen ZHANG Xiaohu YOU Lab of Efficient Architectures for Digital-communication and Signal-processing (LEADS) Southeast University National Mobile Communications Research laboratory Southeast University quantum information Center Southeast University

With the progressive scale-down of semiconductor’s feature size, people are looking forward to More Moore and More than Moore. In order to o?er a possible alternative implementation process,researchers are trying to figure out a feasible transfer from silicon to molecular computing. Such transfer lies on bio-based modules programming with computer-like logic, aiming at realizing the Turing *** accomplish this, the DNA-based combinational logic is inevitably the first step we have taken care *** timely overview study introduces combinational logic synthesized in DNA computing from both analog and digital perspectives separately. State-of-the-art research progress is summarized for interested readers to quick understand DNA computing, initiate discussion on existing techniques and inspire innovation *** hope this study can pave the way for the future DNA computing synthesis.

关键词： synthetic biology DNA computing DNA strand displacement reactions chemical reaction networks combinational logic

Manipulating high-temperature superconductivity by oxygen doping in Bi2Sr2CaCu2O8+δ thin flakes

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National Science Review 2022年第10期9卷 112-119页

作者： Bin Lei Donghui Ma Shihao Liu Zeliang Sun Mengzhu Shi Weizhuang Zhuo Fanghang Yu Genda Gu Zhenyu Wang Xianhui Chen Key laboratory of Strongly-Coupled quantum Matter Physics Chinese Academy of Sciences and Department of Physics University of Science and Technology of China CAS Center for Excellence in quantum information and quantum Physics Department of Condensed Matter Physics and Materials Science Brookhaven National Laboratory CAS Center for Excellence in superconducting Electronics (CENSE) Collaborative Innovation Center of Advanced Microstructures Nanjing University

Harnessing the fascinating properties of correlated oxides requires precise control of their carrier *** to other methods,oxygen doping provides an effective and more direct way to tune the electronic properties of correlated *** several approaches,such as thermal annealing and oxygen migration,have been introduced to change the oxygen content,a continuous and reversible solution that can be integrated with modern electronic technology is much in ***,we report a novel ionic field-effect transistor using solid Gd-doped CeO2as the gate dielectric,which shows a remarkable carrier-density-tuning ability via electric-field-controlled oxygen concentration at room *** Bi2Sr2CaCu2O8+δ(Bi-2212) thin flakes,we achieve a reversible superconductor-insulator transition by driving oxygen ions in and out of the samples with electric fields,and map out the phase diagram all the way from the insulating regime to the over-doped superconducting regime by continuously changing the oxygen doping *** analysis indicates that the reversible superconductor-insulator transition for the Bi-2212 thin flakes follows the theoretical description of a two-dimensional quantum phase *** work provides a route for realizing electric-field control of phase transition in correlated ***,the configuration of this type of transistor makes heterostructure/interface engineering possible,thus having the potential to serve as the next-generation all-solid-state field-effect transistor.

关键词： high-temperature superconductivity oxygen doping electric field effect all-solid-state field effect transistor superconductor–insulator transition

Multiplexing Read-Out of Charge Qubits by a superconducting Resonator

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Chinese Physics Letters 2016年第4期33卷 117-120页

作者：韩天一邓光伟魏达郭国平 Key laboratory of quantum information Chinese Academy of SciencesUniversity of Science and Technology of China Synergetic Innovation Center of quantum information and quantum Physics University of Science and Technology of China

Wavelength division multiplexing （WDM） is widely used in modern optics and electronics. For future quantum computers, the integration of readout is also vitally important. Here we incorporate an idea of WDM to demon- strate multiplexing readout of charge qubits by using a single integrated on-chip superconducting microwave resonator. Two distant qubits formed by two graphene double quantum dots （DQDs） are simultaneously readout by an interconnected superconducting resonator. This readout device is found to have 2 MHz bandwidth and 1.1 x 10-4 e/x/-H-z charge sensitivity. Different frequency gate-modulations, which are used selectively to change the impedance of the qubits, are applied to different DQDs, which results in separated sidebands in the spectrum. These sidebands enable a multiplexing readout for the multi-qubits circuit. This architecture can largely reduce the amount of detectors and can improve the prospect for scaling-up of semiconductor qubits.

关键词： of in on is by Multiplexing Read-Out of Charge Qubits by a superconducting Resonator

Pulse-gated mode of commercial superconducting nanowire single photon detectors

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Chinese Physics B 2021年第4期30卷 144-150页

作者： Fan Liu Mu-Sheng Jiang Yi-Fei Lu Yang Wang Wan-Su Bao Henan Key laboratory of quantum information and Cryptography SSF IEUZhengzhou 450001China Synergetic Innovation Centre of quantum information and quantum Physics University of Science and Technology of ChinaHefei 230026China

High detection efficiency and low intrinsic dark count rate are two advantages of superconducting nanowire single photon detectors(SNSPDs).However,the stray photons penetrated into the fiber would cause the extrinsic dark count rate,owing to the free running mode of *** order to improve the performance of SNSPDs in realistic scenarios,stray photons should be investigated and suppression methods should be *** this study,we demonstrate the pulsegated mode,with 500 kHz gating frequency,of a commercial SNSPD system for suppressing the response of stray photons about three orders of magnitude than its free-running counterpart on the extreme test *** we push the gating frequency to 8 MHz,the dark count rate still keeps under 4% of free-running *** experiments,the intrinsic dark count rate is also suppressed to 4.56 × 10^(-2) counts per second with system detection efficiency of 76.4372%.Furthermore,the time-correlated single-photon counting analysis also approves the validity of our mode in suppressing the responses of stray photons.

关键词： quantum detector superconducting nanowire pulse gated dark count rate

Production of the Superposition of Nonlinear Coherent States and Entangled Nonlinear Coherent States

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Communications in Theoretical Physics 2015年第9期64卷 341-344页

作者： A.Karimi M.K.Tavassoly Atomic and Molecular Group Faculty of Physics Yazd University Physics Group Islamic Azad University of Abadeh The laboratory of quantum information processing Yazd University

In this paper, by using the parity operator as well as the nonlinear displacement-type operator, we define new operators which by the action of them on the vacuum state of the radiation field, superposition of two nonlinear coherent states and two-mode entangled nonlinear coherent states are generated. Also, we show that via the generalization of the presented method, the superposition of more than two nonlinear coherent states and n-mode entangled nonlinear coherent states can be generated.

关键词： superposition entangled nonlinear coherent states