output
19932026
Showing 2018 · quant-phShow all

75 papers · 2 filters

quant-ph2018★ 455 cited

Theory of variational quantum simulation

Xiao Yuan, Suguru Endo, Qi Zhao +2

The variational method is a versatile tool for classical simulation of a variety of quantum systems. Great efforts have recently been devoted to its extension to quantum computing…

quant-ph2018★ 4 cited

Experimental Test of Tracking the King Problem

Cheng-Qiu Hu, Jun Gao, Lu-Feng Qiao +7

In quantum theory, the retrodiction problem is not as clear as its classical counterpart because of the uncertainty principle of quantum mechanics. In classical physics, the measur…

quant-ph2018★ 16 cited

Combining the synergistic control capabilities of modelling and experiments: illustration of finding a minimum time quantum objective

Qi-Ming Chen, Xiaodong Yang, Christian Arenz +4

A common way to manipulate a quantum system, for example spins or artificial atoms, is to use properly tailored control pulses. In order to accomplish quantum information tasks bef…

quant-ph2018★ 11 cited

A high threshold code for modular hardware with asymmetric noise

Xiaosi Xu, Qi Zhao, Xiao Yuan +1

We consider an approach to fault tolerant quantum computing based on a simple error detecting code operating as the substrate for a conventional surface code. We develop a customis…

quant-ph2018★ 3 cited

Quantifying Coherence with Untrusted Devices

Xingjian Zhang, Yunchao Liu, Xiao Yuan

Device-independent (DI) tests allow to witness and quantify the quantum feature of a system, such as entanglement, without trusting the implementation devices. Although DI test is…

quant-ph2018★ 13 cited

Uniaxial dynamical decoupling for an open quantum system

Qi Yao, Jun Zhang, Xiao-feng Yi +2

Dynamical decoupling (DD) is an active and effective method for suppressing decoherence of a quantum system from its environment. In contrast to the nominal biaxial DD,this work pr…

quant-ph2018★ 66 cited

Efficient Representation of Topologically Ordered States with Restricted Boltzmann Machines

Sirui Lu, Xun Gao, L. -M. Duan

Representation by neural networks, in particular by restricted Boltzmann machines (RBM), has provided a powerful computational tool to solve quantum many-body problems. An importan…

quant-ph2018★ 27 cited

Nonadiabatic dynamics and geometric phase of an ultrafast rotating electron spin

Xing-Yan Chen, Tongcang Li, Zhang-qi Yin

The spin in a rotating frame has attracted a lot of attentions recently, as it deeply relates to both fundamental physics such as pseudo-magnetic field and geometric phase, and app…

quant-ph2018★ 34 cited

Encoding-side-channel-free and measurement-device-independent quantum key distribution

Xiang-Bin Wang, Xiao-Long Hu, Zong-Wen Yu

We present a simple protocol where Alice and Bob only needs sending out a coherent state or not-sending out a coherent state to Charlie. There is no bases switching. We show that t…

quant-ph2018★ 22 cited

Equivalence Checking of Sequential Quantum Circuits

Qisheng Wang, Riling Li, Mingsheng Ying

We define a formal framework for equivalence checking of sequential quantum circuits. The model we adopt is a quantum state machine, which is a natural quantum generalisation of Me…

quant-ph2018★ 46 cited

Experimental Simultaneous Learning of Multiple Non-Classical Correlations

Mu Yang, Chang-liang Ren, Yue-chi Ma +7

Non-classical correlations can be regarded as resources for quantum information processing. However, the classification problem of non-classical correlations for quantum states rem…

quant-ph2018★ 120 cited

Learning Robust and High-Precision Quantum Controls

Re-Bing Wu, Haijin Ding, Daoyi Dong +1

Robust and high-precision quantum control is extremely important but challenging for the functionization of scalable quantum computation. In this paper, we show that this hard prob…

quant-ph2018★ 2 cited

Implementation and Security Analysis of Practical Quantum Secure Direct Communication

Ruoyang Qi, Zhen Sun, Zaisheng Lin +7

Fast development of supercomputer and perspective quantum computer is posing increasing serious threats to communication security. Based on the laws of quantum mechanics, quantum c…

quant-ph2018★ 10 cited

Probabilistic Eigensolver with a Trapped-Ion Quantum Processor

Jing-Ning Zhang, Iñigo Arrazola, Jorge Casanova +3

Quantum simulation of complex quantum systems and their properties often requires the ability to prepare initial states in an eigenstate of the Hamiltonian to be simulated. In addi…

quant-ph2018

Detection of genuine n-qubit entanglement via the proportionality of two vectors

Dafa Li

In [Science 340, 1205, 7 June (2013)], via polytopes Michael Walter et al. proposed a sufficient condition detecting the genuinely entangled pure states. In this paper, we indicate…

quant-ph2018★ 76 cited

Demonstration of Controlled-Phase Gates between Two Error-Correctable Photonic Qubits

Yuan Xu, Yuwei Ma, Weizhou Cai +11

To realize fault-tolerant quantum computing, it is necessary to store quantum information in logical qubits with error correction functions, realized by distributing a logical stat…

quant-ph2018★ 7 cited

Positive-partial-transpose distinguishability for lattice-type maximally entangled states

Zong-Xing Xiong, Mao-Sheng Li, Zhu-Jun Zheng +2

We study the distinguishability of a particular type of maximally entangled states -- the "lattice states" using a new approach of semidefinite program. With this, we successfully…

quant-ph2018★ 46 cited

Operational interpretation of coherence in quantum key distribution

Jiajun Ma, You Zhou, Xiao Yuan +1

Quantum coherence was recently formalized as a physical resource to measure the strength of superposition. Based on the resource theory, we present a systematic framework that conn…

quant-ph2018★ 18 cited

Universal quantum gates between nitrogen-vacancy centers in a levitated nanodiamond

Xing-Yan Chen, Zhang-qi Yin

We propose a scheme to realize universal quantum gates between nitrogen-vacancy (NV) centers in an optically trapped nanodiamond, through uniform magnetic field induced coupling be…

quant-ph2018★ 23 cited

Prethermalization and nonreciprocal phonon transport in a levitated optomechanical array

Shengyan Liu, Zhang-qi Yin, Tongcang Li

We consider an array of optically levitated nanospheres in vacuum and investigate nontrivial phonon transports in this system. The levitated nanospheres are coupled by optical bind…

quant-ph2018★ 3 cited

Symmetric vs. bosonic extension for bipartite states

Youning Li, Shilin Huang, Dong Ruan +1

A bipartite state has a -symmetric extension if there exists a -partite state with marginals . The -symmetri…

quant-ph2018★ 5 cited

Experimental Simulation of Bosonic Creation and Annihilation Operators in a Quantum Processor

Xiangyu Kong, Shijie Wei, Jingwei Wen +1

The ability of implementing quantum operations plays fundamental role in manipulating quantum systems. Creation and annihilation operators which transform a quantum state to anothe…

quant-ph2018★ 93 cited

Testing Local Realism into the Past without Detection and Locality Loopholes

Ming-Han Li, Cheng Wu, Yanbao Zhang +16

Inspired by the recent remarkable progress in the experimental test of local realism, we report here such a test that achieves an efficiency greater than (78%)^2 for entangled phot…

quant-ph2018★ 10 cited

Unification of quantum resources in distributed scenarios

Hongyi Zhou, Xiao Yuan, Xiongfeng Ma

Quantum resources, such as coherence, discord, and entanglement, play as a key role for demonstrating advantage in many computation and communication tasks. In order to find the na…