Junhua ZhangAssitant Researcher
email: zhangjh6@sustech.edu.cn
Office：
Research Field：Quantum Computation




BASICINFORMATION

Name:


Gender:
Male

Date of Birth:
03/29/1990

Place of Birth:
Fuzhou, Fujian, China

Mobile Phone:
+86 **

E-mail:
zhangjh6@sustc.edu.cn

Occupation
Assistant Research Fellow,
Shenzhen Institute for Quantum Science and Engineering,
Southern University of Science and Technology of China


EDUCATION

09/01/2012 – 01/24/2018
Center for Quantum Information, Tsinghua University


PhD. of Quantum Information, focused on trapped-ion system
Advisor: Prof. Kihwan Kim

09/01/2008 – 06/30/2012
School of Physics, Peking University


Bachelor of Applied Physics


RESEARCHPROJECTS AND LAB CONTRIBUTIONS:

l Entanglement of Ba-Yb multi-species trapped-ion system
Developing the multi-species system and using Raman interactions to implement M?lmer-S?rensen gates between the internal states of a ¹³⁸Ba⁺ ion and an ¹⁷¹Yb⁺ ion.

l Development of phonon arithmetic operations
Using adiabatic passage with diabatic optimizations to realize phonon-number-independent addition and subtraction operation of Fock states.

l Creating Arbitrary NOON States of Phonons
Using a composite-pulse scheme to deterministically create and verify arbitrary NOON states of phonons. Up to N=9 is realized in experiment.

l Realization of Geometric Landau-Zener-Stückelberg Interferometry
Using the hyperfine levels of a ground state ¹⁷¹Yb⁺ ion to simulate the dynamics of pure geometric Landau-Zener-Stückelberg interferometry.

l High speed multi-channel TTL pulse sequencer
Using FPGA to develop a programmable 32-channel TTL pulse generator with a timing resolution of 2.5ns which serves as the experiment flow controller of the whole system.

l Multi-channel incident pulse counter
Using FPGA to develop an 8-channel counter with 16 configurable incident profiles and a counting frequency of 500MHz.


RESEARCHINTERESTS

Quantum Simulation
Quantum Computation
Trapped-ion Technology


AWARDS:

2016
National Scholarship of Tsinghua University

2014
Guanghua Scholarship, First Prize

2013
Baidu Scholarship, Third Prize

2010
Mathematical Contest in Modeling, Honorable Mention


PUBLICATIONS

[1]
M. Um, Q. Zhao, J. H. Zhang, P. F. Wang, Y. Wang, M. Qiao, H. Y. Zhou, X. F. Ma, and K. Kim, "Randomness Expansion Secured by Quantum Contextuality", Phys. Rev. Applied, vol. 13, p. 034077, 2020.

[2]
T. Xie, N. J. Jin, Y. Wang, J. H. Zhang, M. Um, K. Kim, "Frequency Stabilization of a 650 nm Laser to an I-2 Spectrum for Trapped Ba-138(+) Ions", JOSAB, vol. 36, pp. 243-247, 2019.

[3]
J. H. Zhang, M. Um, D. S. Lv, J. N. Zhang, L. M. Duan, and K. Kim, "NOON States of Nine Quantized Vibrations in Two Radial Modes of a Trapped Ion", Phys. Rev. Lett., vol. 121, p. 160502, 2018.

[4]
Y. C. Shen, Y. Lu, K. Zhang, J. H. Zhang, S. N. Zhang, J. Huh and K. Kim, "Quantum Optical Emulation of Molecular Vibronic Spectroscopy Using a Trapped-ion Device", Chemical Science, vol. 9, pp. 836-840, 2018.

[5]
D. S. Lv, S. M. An, M. Um, J. H. Zhang, J. N. Zhang, M. S. Kim and K. Kim, "Reconstruction of the Jaynes-Cummings Field State of Ionic Motion in a Harmonic Trap", Phys. Rev. A, vol. 95, p. 043813, 2017.

[6]
Y. Wang, M. Um, J. H. Zhang, S. M. An, M. Lyu, J. N. Zhang, L. M. Duan, D. Yum and K. Kim, "Single-Qubit Quantum Memory Exceeding Ten-Minute Coherence Time," Nature Photon., vol. 11, pp. 646-650, 2017

[7]
M. Um, J. H. Zhang (co-first author), D. S. Lv, Y. Lu, S. M. An, J. N. Zhang, H. Nha, M. S. Kim and K. Kim, "Phonon Arithmetic in a Trapped Ion System", Nature Commun., vol. 7, p. 11410, 2016.

[8]
S. M. An, J. N. Zhang, M. Um, D. S. Lv, Y. Lu, J. H. Zhang, Z. Q. Yin, H. T. Quan and K. Kim, "Experimental Test of the Quantum Jarzynski Equality with a Trapped-ion System", Nature Physics, vol. 11, pp. 193-199, 2015.

[9]
J. Park, J. H. Zhang, J. Lee, S. W. Ji, M. Um, D. S. Lv, K. Kim and H. Nha, "Testing Nonclassicality and Non-Gaussianity in Phase Space", Phys. Rev. Lett., vol. 114, p. 190402, 2015.

[10]
X. Zhang, Y. C. Shen, J. H. Zhang, J. Casanova, L. Lamata, E. Solano, M. H. Yung, J. N. Zhang and K. Kim, "Time Reversal and Charge Conjugation in an Embedding Quantum Simulator", Nature Commun., vol. 6, p. 8917, 2015.

[11]
J. H. Zhang and K. Kim, "Realization of Geometric Landau-Zener-Stückelberg Interferometry", Phys. Rev. A, vol. 89, p. 013608, 2014.

[12]
M. Um, X. Zhang, J. H. Zhang, Y. Wang, Y. C. Shen, D. L. Deng, L. M. Duan and K. Kim, "Experimental Certification of Random Numbers via Quantum Contextuality", Sci. Rep., vol. 3, p. 1627, 2013.

[13]
X. Zhang, M. Um, J. H. Zhang, S. M. An, Y. Wang, D. L. Deng, C. Shen, L. M. Duan and K. Kim, "State-independent Experimental Test of Quantum Contextuality with a Single Trapped Ion", Phys. Rev. Lett., vol. 110, p. 070401, 2013.