Quantum Theory Group at CityU

2022

​

55. Coupling two charge qubits via a superconducting resonator operating in the res- onant and dispersive regimes,
C. Zhang, G. X. Chan, X. Wang, and Z.-Y. Xue,

Phys. Rev. A 106, 032608 (2022).

arXiv

​

54. Sign switching of superexchange mediated by few electrons under nonuniform mag- netic field,
G. X. Chan, and X. Wang,
Phys. Rev. A 106, 022420 (2022).

arXiv

​

53. Robust entangling gate for capacitively coupled few-electron singlet-triplet qubits, G. X. Chan, and X. Wang,
Phys. Rev. B 106, 075417 (2022).

arXiv

​

52. Microscopic theory on magnetic-field-tuned sweet spot of exchange interactions in multielectron quantum-dot systems,
G. X. Chan, and X. Wang,
Phys. Rev. B 105, 245409 (2022).

arXiv

​

2021
 

51. Implementation of geometric quantum gates on microwave-driven semiconductor charge qubits,
C. Zhang, T. Chen, X. Wang, and Z.-Y. Xue,

Adv. Quantum Technol. 2021, 2100011 (2021).

arXiv

​

50. Generalizable control for multiparameter quantum metrology,

H. Xu, L. Wang, H. Yuan, and X. Wang,
Phys. Rev. A 103, 042615 (2021).

arXiv

 

​​49. Charge noise suppression in capacitively coupled singlet-triplet spin qubits under magnetic field,
G. X. Chan, J. P. Kestner, and X. Wang,

Phys. Rev. B 103, L161409 (2021).

arXiv

 

​​48. Generic detection-based error mitigation using quantum autoencoders,

X.-M. Zhang, W. Kong, M. U. Farooq, M.-H. Yung, G. Guo, and X. Wang,

Phys. Rev. A 103, L040403 (2021).

arXiv

​​​​

2020

​

47. High-fidelity geometric gate for silicon-based spin qubits,

C. Zhang, T. Chen, S. Li, X. Wang, and Z.-Y. Xue,

Phys. Rev. A 101, 052302 (2020).

arXiv

​

2019

​

46. Suppression of leakage for a charge quadrupole qubit in triangular geometry,

G. X. Chan, and X. Wang,

Adv. Quantum Technol. 2019, 1900072 (2019).

arXiv

​

45. When does reinforcement learning stand out in quantum control? A comparative study on state preparation,

X.-M. Zhang, Z. Wei, R. Asad, X.-C. Yang, and X. Wang,

npj Quantum Inf. 5, 85 (2019).

arXiv

​

44. Generalizable control for quantum parameter estimation through reinforcement learning,

H. Xu, J. Li, L. Liu, Y. Wang, H. Yuan, and X. Wang,

npj Quantum Inf. 5, 82 (2019).

arXiv

​

43. Quantum information scrambling through a high-complexity operator mapping,

X. Li, G. Zhu, M. Han, and X. Wang,

Phys. Rev. A 100, 032309 (2019).

arXiv

​

42. Plug-and-play approach to nonadiabatic geometric quantum computation,

B.-J. Liu, X.-K. Song, Z.-Y. Xue, X. Wang, and M.-H. Yung,

Phys. Rev. Lett. 123, 100501 (2019).

arXiv

 

41. Minimal nonorthogonal gate decomposition for qubits with limited control,

X.-M. Zhang, J. Li, X. Wang, and M.-H. Yung,

Phys. Rev. A 99, 052339 (2019).

arXiv

​

40. Spin-qubit noise spectroscopy from randomized benchmarking by supervised learning,

C. Zhang, and X. Wang,

Phys. Rev. A 99, 042316 (2019).

arXiv

​

2018

​

39. Tunable charge qubit based on barrier-controlled triple quantum dots,

X.-C. Yang, G. X. Chan, and X. Wang,

Phys. Rev. A 98, 032334 (2018).

arXiv

​

38. Automatic spin-chain learning to explore the quantum speed limit,

X.-M. Zhang, Z.-W. Cui, X. Wang, and M.-H. Yung,

Phys. Rev. A 97, 052333 (2018).

arXiv

​

37. Leakage and sweet spots in triple-quantum-dot spin qubits: a molecular orbital study,

C. Zhang, X.-C. Yang, and X. Wang,

Phys. Rev. A 97, 042326 (2018).

arXiv

 

36. Neural-network-designed pulse sequences for robust control of singlet-triplet qubits,

X.-C. Yang, M.-H. Yung, and X. Wang,

Phys. Rev. A 97, 042324 (2018).

arXiv

​

35. On the validity of microscopic calculations of double-quantum-dot spin qubits based on Fock-Darwin states,

G. X. Chan and X. Wang,

Sci. China Phys. Mech. Astron. 61, 040313 (2018).

arXiv

 

34. Magic angle for barrier-controlled double quantum dots,

X.-C. Yang and X. Wang,

Phys. Rev. A 97, 012304 (2018).

arXiv

​

2017

​

33. Fast pulse sequences for dynamically corrected gates in singlet-triplet qubits,

R. E. Throckmorton, C. Zhang, X.-C. Yang, X. Wang, E. Barnes, and S. Das Sarma,

Phys. Rev. B 96, 195424 (2017).

arXiv

​

32. Suppression of charge noise using barrier control of a singlet-triplet qubit,

X.-C. Yang, and X. Wang,

Phys. Rev. A 96, 012318 (2017).

arXiv

​

31. Randomized benchmarking of barrier versus tilt control of a singlet-triplet qubit,

C. Zhang, R. E. Throckmorton, X.-C. Yang, X. Wang, E. Barnes, and S. Das Sarma,

Phys. Rev. Lett. 118, 216802 (2017).

arXiv

 

30. Energy spectrum, exchange interaction, and gate crosstalk in a system with a pair of double quantum dots: A molecular-orbital calculation,

X.-C. Yang and X. Wang,

Phys. Rev. A 95, 052325 (2017).

arXiv

​

2016

​

29. Benchmarking of dynamically corrected gates for the exchange-only spin qubit in 1/f noise environment,

C. Zhang, X.-C. Yang, and X. Wang,

Phys. Rev. A 94, 042323 (2016).

arXiv

​

28. Fast control of semiconductor qubits beyond the rotating wave approximation,

Y. Song, J. P. Kestner, X. Wang, and S. Das Sarma,

Phys. Rev. A 94, 012321 (2016).  

arXiv

 

27. Noise filtering of composite pulses for singlet-triplet qubits,

X.-C. Yang and X. Wang,

Sci. Rep. 6, 28996 (2016).  

arXiv

​

2015

​

26. Improving the gate fidelity of capacitively coupled spin qubits,

X. Wang, E. Barnes, and S. Das Sarma,

npj Quantum Inf. 1, 15003 (2015). 

arXiv

​

25. Robust quantum control using smooth pulses and topological winding,

E. Barnes, X. Wang, and S. Das Sarma,

Sci. Rep. 5, 12685 (2015).

arXiv

​

2014

​

24. Noise-compensating pulses for electrostatically controlled silicon spin qubits,

X. Wang, F. A. Calderon-Vargas, M. S. Rana, J. P. Kestner, E. Barnes, and S. Das Sarma,

Phys. Rev. B 90, 155306 (2014).

arXiv

​

23. Ferromagnetic response of a "high-temperature" quantum antiferromagnet,

X. Wang, R. Sensarma, and S. Das Sarma,

Phys. Rev. B 89, 121118(R) (2014).

arXiv

​

22. Robust two-qubit gates for exchange-coupled qubits,

F. Setiawan, H.-Y. Hui, J. P. Kestner, X. Wang, and S. Das Sarma,

Phys. Rev. B 89, 085314 (2014).

arXiv

​

21. Robust quantum gates for singlet-triplet spin qubits using composite pulses,

X. Wang, L. S. Bishop, E. Barnes, J. P. Kestner, and S. Das Sarma,

Phys. Rev. A 89, 022310 (2014).

arXiv

​

2013

​

20. Dynamically corrected gates for an exchange-only qubit,

G. T. Hickman, X. Wang, J. P. Kestner, and S. Das Sarma,

Phys. Rev. B 88, 161303(R) (2013).

arXiv

​

 

19. Noise-resistant control for a spin qubit array,

J. P. Kestner, X. Wang, L. S. Bishop, E. Barnes, and S. Das Sarma,

Phys. Rev. Lett. 110, 140502 (2013).

arXiv

​

2012

​

18. Composite pulses for robust universal control of singlet-triplet qubits,

X. Wang, L. S. Bishop, J. P. Kestner, E. Barnes, K. Sun, and S. Das Sarma,

Nature Commun. 3, 997 (2012).

arXiv

​

17. Covalency, double-counting and the metal-insulator phase diagram in transition metal oxides,

X. Wang, M. J. Han, L. de' Medici, H. Park, C. A. Marianetti, and A. J. Millis,

Phys. Rev. B 86, 195136 (2012).

arXiv

​

2011

​

16. Mott-insulating phases and magnetism of fermions in a double-well optical lattice,

X. Wang, Q. Zhou, and S. Das Sarma,

Phys. Rev. A 84, 061603(R) (2011).

arXiv

 

15. Dynamical mean field theory of nickelate superlattices,

M. J. Han, X. Wang, C. A. Marianetti, and A. J. Millis,

Phys. Rev. Lett. 107, 206804 (2011).

arXiv

 

14. Quantum theory of the charge stability diagram of semiconductor double quantum dot systems,

X. Wang, S. Yang, and S. Das Sarma,

Phys. Rev. B 84, 115301 (2011).

arXiv

 

13. High-frequency asymptotic behavior of self-energies in quantum impurity models,

X. Wang, H. T. Dang, and A. J. Millis,

Phys. Rev. B 84, 073104 (2011).

arXiv

 

12. d3z2-r2 orbital in high-Tc cuprates: Excitonic spectrum, metal-insulator phase diagram, optical conductivity, and orbital character of doped holes,

X. Wang, H. T. Dang, and A. J. Millis,

Phys. Rev. B 84, 014530 (2011).

arXiv

 

11. Hubbard model description of silicon spin qubits: Charge stability diagram and tunnel coupling in Si double quantum dots,

S. Das Sarma, X. Wang, and S. Yang,

Phys. Rev. B 83, 235314(2011).

arXiv

 

10. Diagrammatic quantum Monte Carlo solution of the two-dimensional cooperon-fermion model,

K.-Y. Yang, E. Kozik, X. Wang, and M. Troyer,

Phys. Rev. B 83, 214516(2011).

arXiv

​

9. Generic Hubbard model description of semiconductor quantum-dot spin qubits,

S. Yang, X. Wang, and S. Das Sarma,

Phys. Rev. B 83, 161301(R) (2011). (Editors' suggestion)

arXiv

​

8. Role of oxygen-oxygen hopping in the three-band copper-oxide model: Quasi-particle weight, metal insulator and magnetic phase boundaries, gap values,and optical conductivity,

X. Wang, L. de' Medici, and A. J. Millis,

Phys. Rev. B 83, 094501(2011).

arXiv

​

2010

​

7. Theory of oxygen K edge x-ray absorption spectra of cuprates,

X. Wang, L. de' Medici, and A. J. Millis,

Phys. Rev. B 81, 094522(2010).

arXiv

 

6. Quantum criticality and non-Fermi-liquid behavior in a two-level two-lead quantum dot,

X. Wang and A. J. Millis,

Phys. Rev. B 81, 045106 (2010).

arXiv

​

2009

​

5. Correlation strength, gaps, and particle-hole asymmetry in high-Tc cuprates: A dynamical mean field study of the three-band copper-oxide model,

L. de' Medici, X. Wang, M. Capone, and A. J. Millis,

Phys. Rev. B 80, 054501(2009). 

arXiv

​

 

4. Antiferromagnetism and the gap of a Mott insulator: Results from analytic continuation of the self-energy,

X. Wang, E. Gull, L. de' Medici, M. Capone, and A. J. Millis,

Phys. Rev. B 80, 045101(2009). (Editors' suggestion)

arXiv

​

2008

​

3. Local order and the gapped phase of the Hubbard model: a plaquette dynamical mean field investigation,

E. Gull, P. Werner, X. Wang, M. Troyer, and A. J. Millis,

Europhys. Lett. 84, 37009 (2008).

arXiv

​

2. Electronic correlation in nanoscale junctions: Comparison of the GW approximation to a numerically exact solution of the single-impurity Anderson model,

X. Wang, C. D. Spataru, M. S. Hybertsen, and A. J. Millis,

Phys. Rev. B 77, 045119 (2008).

arXiv

​

2004

​

1. Additive temporal coloured noise induced Eckhaus instability in complex Ginzburg-Landau equation system,

X. Wang, X. Tian, H.-L. Wang, Q. Ouyang, and H. Li,

Chin. Phys. Lett. 21, 2365 (2004).

​