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Universal quantum state preparation via revised greedy algorithm

期刊: QUANTUM SCIENCE AND TECHNOLOGY, 2021; 6 (4)

Preparation of quantum state lies at the heart of quantum information processing. The greedy algorithm provides a potential method to effectively prep......

Probing fast oscillating scalar dark matter with atoms and molecules

期刊: QUANTUM SCIENCE AND TECHNOLOGY, 2021; 6 (3)

Light scalar dark matter (DM) with scalar couplings to matter is expected within several scenarios to induce variations in the fundamental constants o......

Dispersive readout of room-temperature ensemble spin sensors

期刊: QUANTUM SCIENCE AND TECHNOLOGY, 2021; 6 (3)

We demonstrate dispersive readout of the spin of an ensemble of nitrogen-vacancy centers in a high-quality dielectric microwave resonator at room temp......

Experimental demonstration of a quantum controlled-SWAP gate with multiple degrees of freedom of a single photon

期刊: QUANTUM SCIENCE AND TECHNOLOGY, 2021; 6 (3)

Optimizing the physical realization of quantum gates is important to build a quantum computer. The controlled-SWAP gate, also named Fredkin gate, can ......

Neural-network-based parameter estimation for quantum detection

期刊: QUANTUM SCIENCE AND TECHNOLOGY, 2021; 6 (4)

Artificial neural networks (NNs) bridge input data into output results by approximately encoding the function that relates them. This is achieved afte......

Mutual information-assisted adaptive variational quantum eigensolver

期刊: QUANTUM SCIENCE AND TECHNOLOGY, 2021; 6 (3)

Adaptive construction of ansatz circuits offers a promising route towards applicable variational quantum eigensolvers on near-term quantum hardware. T......

Entanglement structure detection via machine learning

期刊: QUANTUM SCIENCE AND TECHNOLOGY, 2021; 6 (3)

Detecting the entanglement structure, such as intactness and depth, of an n-qubit state is important for understanding the imperfectness of the state ......

Low-lying energy levels of Th-229(35+) and the electronic bridge process

期刊: QUANTUM SCIENCE AND TECHNOLOGY, 2021; 6 (3)

The nuclear transition between the ground and the low-energy isomeric state in the Th-229 nucleus is of interest due to its high sensitivity to a hypo......

A variational quantum algorithm for Hamiltonian diagonalization

期刊: QUANTUM SCIENCE AND TECHNOLOGY, 2021; 6 (4)

Hamiltonian diagonalization is at the heart of understanding physical properties and practical applications of quantum systems. It is highly desired t......

Finite-key analysis for quantum conference key agreement with asymmetric channels

期刊: QUANTUM SCIENCE AND TECHNOLOGY, 2021; 6 (4)

As an essential ingredient of quantum networks, quantum conference key agreement (QCKA) provides unconditional secret keys among multiple parties, whi......

Efficient quantum memory of orbital angular momentum qubits in cold atoms

期刊: QUANTUM SCIENCE AND TECHNOLOGY, 2021; 6 (4)

The spatial modes of light, carrying a quantized amount of orbital angular momentum (OAM), is one of the excellent candidates that provides access to ......

Randomness quantification for quantum random number generation based on detection of amplified spontaneous emission noise

期刊: QUANTUM SCIENCE AND TECHNOLOGY, 2021; 6 (1)

The amplified spontaneous emission (ASE) noise has been extensively studied and employed to build quantum random number generators (QRNGs). While the ......

Quantum algorithm for the nonlinear dimensionality reduction with arbitrary kernel

期刊: QUANTUM SCIENCE AND TECHNOLOGY, 2021; 6 (1)

Dimensionality reduction (DR) techniques play an extremely critical role in the data mining and pattern recognition field. However, most DR approaches......

Breakdown signatures of the phenomenological Lindblad master equation in the strong optomechanical coupling regime

期刊: QUANTUM SCIENCE AND TECHNOLOGY, 2021; 6 (1)

The Lindblad form of the master equation has proven to be one of the most convenient ways to describe the impact of an environment interacting with a ......

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