Showing 2016 · quant-phShow all

71 papers · 2 filters

quant-ph2016★ 12 cited

Searching for an optimal control in the presence of saddles on the quantum mechanical observable landscape

Gregory Riviello, Re-Bing Wu, Qiuyang Sun +1

The broad success of theoretical and experimental quantum optimal control is intimately connected to the topology of the underlying control landscape. For several common quantum co…

quant-ph2016★ 15 cited

Invariant Perfect Tensors

Youning Li, Muxin Han, Markus Grassl +1

Invariant tensors are states in the SU(2) tensor product representation that are invariant under the SU(2) action. They play an important role in the study of loop quantum gravity.…

quant-ph2016★ 77 cited

Experimental measurement-device-independent quantum random number generation

You-Qi Nie, Jian-Yu Guan, Hongyi Zhou +4

The randomness from a quantum random number generator (QRNG) relies on the accurate characterization of its devices. However, device imperfections and inaccurate characterizations…

quant-ph2016

Experimental Study of Forrelation in Nuclear Spins

Hang Li, Xun Gao, Tao Xin +2

Correlation functions are often employed to quantify the relationships among interdependent variables or sets of data. Recently, a new class of correlation functions, called Forrel…

quant-ph2016★ 18 cited

Ultrastrong-coupling quantum-phase-transition phenomena in a few-qubit circuit QED system

Wen-Juan Yang, Xiang-Bin Wang

We study ultrastrong-coupling quantum-phase-transition phenomena in a few-qubit system. In the one-qubit case, three second-order transitions occur and the Goldstone mode emerges u…

quant-ph2016★ 79 cited

Quantum uncertainty relation using coherence

Xiao Yuan, Ge Bai, Tianyi Peng +1

Measurement outcomes of a quantum state can be genuinely random (unpredictable) according to the basic laws of quantum mechanics. The Heisenberg-Robertson uncertainty relation puts…

quant-ph2016★ 91 cited

Experimental Preparation of High NOON States for Phonons

Junhua Zhang, Mark Um, Dingshun Lv +3

Multi-party entangled states have important applications in quantum metrology and quantum computation. Experimental preparation of large entangled state, in particular, the NOON st…

quant-ph2016★ 39 cited

Vacuum Measurements and Quantum State Reconstruction of Phonons

Dingshun Lv, Shuoming An, Mark Um +4

A quantum state is fully characterized by its density matrix or equivalently by its quasiprobabilities in phase space. A scheme to identify the quasiprobabilities of a quantum stat…

quant-ph2016★ 153 cited

Improved key rate bounds for practical decoy-state quantum key distribution systems

Zhen Zhang, Qi Zhao, Mohsen Razavi +1

The decoy-state scheme is the most widely implemented quantum key distribution protocol in practice. In order to account for the finite-size key effects on the achievable secret ke…

quant-ph2016★ 29 cited

Fermion-antifermion scattering via boson exchange in a trapped ion

Xiang Zhang, Kuan Zhang, Yangchao Shen +7

Quantum field theories describe a wide variety of fundamental phenomena in physics. However, their study often involves cumbersome numerical simulations. Quantum simulators, on the…

quant-ph2016★ 21 cited

Random number generation with cosmic photons

Cheng Wu, Bing Bai, Yang Liu +14

Random numbers are indispensable for a variety of applications ranging from testing physics foundation to information encryption. In particular, nonlocality tests provide a strong…

quant-ph2016★ 59 cited

Proposal for quantum many-body simulation and torsional matter-wave interferometry with a levitated nanodiamond

Yue Ma, Thai M. Hoang, Ming Gong +2

Hybrid spin-mechanical systems have great potentials in sensing, macroscopic quantum mechanics, and quantum information science. In order to induce strong coupling between an elect…

quant-ph2016★ 47 cited

Experimental Demonstration of Uncertainty Relations for the Triple Components of Angular Momentum

Wenchao Ma, Bin Chen, Ying Liu +6

The uncertainty principle is considered to be one of the most striking features in quantum mechanics. In the textbook literature, uncertainty relations usually refer to the prepara…

quant-ph2016★ 7 cited

Optimal Universal Uncertainty Relations

Tao Li, Yunlong Xiao, Teng Ma +4

We study universal uncertainty relations and present a method called joint probability distribution diagram to improve the majorization bounds constructed independently in [Phys. R…

quant-ph2016★ 8 cited

von Neumann measurement-related matrices and the nullity condition for quantum correlation

Ming-Jing Zhao, Teng Ma, Ting-Gui Zhang +1

We study von Neumann measurement-related matrices, and the nullity condition of quantum correlation. We investigate the properties of these matrices that are related to a von Neuma…

quant-ph2016★ 16 cited

Remote Creation of Quantum Coherence

Teng Ma, Ming-Jing Zhao, Shao-Ming Fei +1

We study remote creation of coherence (RCC) for a quantum system, A, with the help of quantum operations on another system, B, and one-way classical communication.We show that all…

quant-ph2016★ 4 cited

Greenberger-Horne-Zeilinger test for multi-dimension and arbitrary time nodes entangled histories

Junkai Dong, YiMing Chen, Da Xu +1

Based on the framework of consistent history theory, the quantum entangled history was proposed in 2015 and experimentally verified through temporal Greenberger-Horne-Zeilinger (GH…

quant-ph2016★ 26 cited

Simulating single photons with realistic photon sources

Xiao Yuan, Zhen Zhang, Norbert Lutkenhaus +1

Quantum information processing provides remarkable advantages over its classical counterpart. Quantum optical systems are proved to be sufficient for realizing general quantum task…

quant-ph2016★ 12 cited

Experimental realization of robust dynamical decoupling with bounded controls in a solid-state spin system

F. Wang, C. Zu, L. He +3

We experimentally demonstrate a robust dynamical decoupling protocol with bounded controls using long soft pulses, eliminating a challenging requirement of strong control pulses in…

quant-ph2016★ 161 cited

Universal Work Fluctuations during Shortcuts To Adiabaticity by Counterdiabatic Driving

Ken Funo, Jing-Ning Zhang, Cyril Chatou +3

Counterdiabatic driving (CD) exploits auxiliary control fields to tailor the nonequilibrium dynamics of a quantum system, making possible the suppression of dissipated work in fini…

quant-ph2016★ 369 cited

Magnon Kerr effect in a strongly coupled cavity-magnon system

Yi-Pu Wang, Guo-Qiang Zhang, Dengke Zhang +6

We experimentally demonstrate magnon Kerr effect in a cavity-magnon system, where magnons in a small yttrium iron garnet (YIG) sphere are strongly but dispersively coupled to the p…

quant-ph2016★ 28 cited

Unbounded memory advantage in stochastic simulation using quantum mechanics

Andrew J. P. Garner, Qing Liu, Jayne Thompson +2

Simulating the stochastic evolution of real quantities on a digital computer requires a trade-off between the precision to which these quantities are approximated, and the memory r…

quant-ph2016

Emergence of Network Bifurcation Triggered by Entanglement

Xi Yong, Man-Hong Yung, Xue-Ke Song +2

In many non-linear systems, such as plasma oscillation, boson condensation, chemical reaction, and even predatory-prey oscillation, the coarse-grained dynamics are governed by an e…

quant-ph2016★ 46 cited

Energy localization enhanced ground-state cooling of mechanical resonator from room temperature in optomechanics using a gain cavity

Yu-Long Liu, Yu-xi Liu

When a gain system is coupled to a loss system, the energy usually flows from the gain system to the loss one. We here present a counterintuitive theory for the ground-state coolin…