Research interests
- Spectral theory of Laplacians on noncompact Riemannian manifolds
- Spectral theory of quasiperiodic Schrödinger operators
- WKB and spectral theory of Schrödinger operators with decaying potentials
- KAM theory in Hamiltonian PDEs
- Transport theory in quantum physics
- Fractal properties of singular continuous spectra
- HRT conjecture
- Littlewood conjecture
- Inhomogeneous Diophantine approximation
Publications
- S. Jitomirskaya, W. Liu,
Inhomogeneous Diophantine approximation in the coprime setting. Adv. Math. to appear.
arXiv version
- S. Jitomirskaya, H. Krüger and W. Liu,
Exact dynamical decay rate for the almost Mathieu operator. Math. Res. Lett. to appear.
arXiv version
- W. Liu, Growth of the eigensolutions of Laplacians on Riemannian manifolds I: construction of energy function.
Int. Math. Res. Not. IMRN to appear. arXiv version
- W. Liu, D. Ong,
Sharp spectral transition for eigenvalues embedded into the spectral bands of perturbed periodic operators. J. Anal. Math. to appear.
arXiv version
- W. Liu, The asymptotical behaviour of the embedded eigenvalue for perturbed periodic operators.
Pure Appl. Funct. Anal. to appear.
arXiv version
- W. Liu, Y. Shi, Upper bounds on the spectral gaps of quasi-periodic
Schrödinger operators with Liouville frequencies. J. Spectr. Theory to appear. arXiv version
- W. Liu, Almost Mathieu operators with with completely resonant phases. Ergodic Theory
Dynam. Systems to appear. arXiv version
- W. Liu, Some refined results on the mixed Littlewood conjecture for pseudo-absolute values. J. Aust. Math. Soc. 107 (2019), no. 01, 91--109.
arXiv version
- W. Liu, Letter to the Editor: Proof of the HRT conjecture for almost every (1,3) configuration.
J. Fourier Anal. Appl. 25 (2019), no. 4, 1350--1360. arXiv version
- W. Liu, Criteria for eigenvalues embedded into the absolutely continuous spectrum of perturbed Stark type operators.
J. Funct. Anal. 276 (2019), no. 9, 2936--2967. arXiv version
- S. Jitomirskaya, W. Liu,
Noncompact complete Riemannian manifolds with dense eigenvalues embedded in the essential spectrum of the Laplacian.
Geom. Funct. Anal. 29 (2019), no. 1, 238--257.
arXiv version
- W. Liu, Absence of singular continuous spectrum for perturbed discrete Schrödinger operators.
J. Math. Anal. Appl. 472 (2019), no. 2, 1420--1429.
arXiv version
- S. Jitomirskaya, W. Liu,
Universal hierarchical structure of quasiperiodic eigenfunctions. Ann. of Math. (2) 187 (2018), no. 3, 721--776.
arXiv version
- W. Liu, Growth of the eigensolutions of Laplacians on Riemannian manifolds II: positivity of initial energy. Math. Phys. Anal. Geom. 21 (2018), no. 3, 21:18.
arXiv version
- W. Liu, Continuous quasiperiodic Schrödinger operators with Gordon type potentials. J. Math. Phys. 59 (2018), no. 6, 063501, 6 pp.
arXiv version
- S. Jitomirskaya, W. Liu, Arithmetic spectral transitions for the Maryland model.
CPAM(2017), no.6, 1025--1051.
arXiv version
- S. Jitomirskaya, W. Liu, A Lower Bound on the Lyapunov Exponent for the Generalized Harper's Model.
J. Stat. Phys. 166 (2017), no. 3-4, 609–-617.
arXiv version
- W. Liu, The spectra of the surface Maryland model for all phases. Proc. Amer. Math. Soc. 144 (2016), no.12, 5035--5047.
arXiv version
- W. Liu, X. Yuan, Anderson localization for the completely resonant phases. J. Funct. Anal. 268 (2015), no. 3, 732--747.
arXiv version
- W. Liu, X. Yuan, Hölder continuity of the spectral measures for one-dimensional Schrödinger operator in exponential regime.
J. Math. Phys. 56 (2015), no. 1, 012701, 21 pp.
arXiv version
- W. Liu, X. Yuan, Spectral gaps of almost Mathieu operators in the exponential regime.
J. Fractal Geom. 2 (2015), no. 1, 1--51.
arXiv version
- W. Liu, X. Yuan, Anderson localization for the almost Mathieu operator in the exponential regime.
J. Spectr. Theory 5 (2015), no. 1, 89--112.
arXiv version
- W. Liu, Z. Huang, On the relationship of the spectra of the self-adjoint operator and its Liouville operator.
Internat. J. Theoret. Phys. 52 (2013), no. 8, 2578--2591.
Pdf
- W. Liu, Z. Huang, The generalized eigenvector expansions of the Liouville operator. Internat.
J. Theoret. Phys. 52 (2013), no. 12, 4323--4334.
Pdf
- S. Jitomirskaya, W. Liu, and S. Zhang,
Arithmetic spectral transitions. To appear to AMS/PCMI, Harmonic Analysis, 2018 .
Preprints
- S. Jitomirskaya, W. Liu,
Universal reflective-hierarchical structure of quasiperiodic eigenfunctions and sharp spectral
transitions in phase.
arXiv version
- W. Liu, Criteria for embedded eigenvalues for discrete Schrödinger operators.
arXiv version
- W. Liu, Sharp bounds for finitely many embedded eigenvalues of perturbed Stark type operators.
arXiv version
- W. Liu, The Möbius transformation of continued fractions with bounded upper and lower partial quotients.
arXiv version
Preprints in the final stages of preparation. Available upon request
- W. Liu, WKB and absence of singular continuous spectrum for perturbed periodic Schrödinger operators.
Preprint
- S. Jitomirskaya, W. Liu,
Noncompact complete Riemannian manifolds with singular continuous spectrum embedded in the
essential spectrum of the Laplacian. Preprint
- S. Jitomirskaya, W. Liu and S. Tcheremchantsev,
Wavepacket spreading and fractal spectral dimension of quasiperiodic
operators with singular continuous spectrum. Preprint
- S. Jitomirskaya, W. Liu and L. Mi,
Density of eigenfunctions for quasiperiodic operators. Preprint
- S. Jitomirskaya, W. Liu and Y. Shi,
Anderson localization for high dimensional quasi-periodic operators with long-range interactions.Preprint
Notes
- S. Jitomirskaya, W. Liu,
Sharp Diophantine approximation in the inhomogeneous setting. Preprint.
- W. Liu, Sharp bound on the largest positive eigenvalue for one-dimensional Schrödinger operators.
arXiv version
- W. Liu, X. Yuan, Absolutely continuous spectra for quasiperiodic Schrödinger operators in the exponential regime.
arXiv version
Conference Organization
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(with S.Jitomirskaya) 36th Annual Western States Mathematical Physics Meeting,
UC Irvine, CA, February 18 and 19, 2018.
Webpage
Colloquium Talks
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Special Colloquium, UC Irvine, Jan 8, 2019.
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Special Colloquium, UCLA, Jan 10, 2019.
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Special Colloquium, Texas A&M University, Jan 17, 2019.
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Special Colloquium, MSU, Jan 21, 2019.
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Special Colloquium, University of Arizona, Jan 31, 2019.
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(Declined)Special Colloquium, Virginia Tech, February, 2019.
Invited Conference Talks
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The Great Lakes Mathematical Physics meeting 2019, Oberlin College, June 28-30, 2019.
Webpage
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AMS Special Session on Localization and Delocalization for Disordered Quantum Systems,
Joint Mathematics Meetings, Baltimo, MD,
January 16-19, 2019. Webpage
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Spectral Theory of Quasi-Periodic and Random Operators,
November 12-16, 2018. Webpage
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Anderson localization for high dimensional quasi-periodic operators with long-range interactions
(AMS Special Session on Ergodic and Topological Quantum Systems, University of Michigan, October 20-21, 2018).
Webpage
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The third Great Lakes Mathematical Physics Meeting, June 22-24, 2018.
Webpage
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Global Young Scholar Forum, Sichuan University, Chengdu, Sichuan, China,
May 14-17, 2018.
Webpage
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Special Session on Spectral Theory, AMS Spring Western Sectional Meeting
Portland State University, Portland, OR ,
April 14-15, 2018.
Webpage
- Sharp spectral transitions for singular spectrum and growth of eigenfunctions of Laplacians on Riemannian manifolds
(The 36th Annual Western States Meeting of Mathematical Physics, UCI, Feb 18-Feb 19, 2018).
Webpage
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Special Session on Analysis and Geometry of Fractals, AMS Fall Western Sectional Meeting, UC Riverside, Nov 4-5, 2017.
Webpage
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Sharp spectral
transitions and growth of eigenfunctions of Laplacians on Riemannian manifolds (9th St. Petersburg Conference in Spectral Theory
dedicated to the memory of M. Sh. Birman, Euler Institute, St. Petersburg, Russia, 3-6 July, 2017).
Webpage
- Universal Hierarchical Structure of the Almost Mathieu Eigenfunctions
(Young Researcher Symposium, Toronto, Canada, Aug 22-Aug 26, 2016).
Webpage
- Sharp arithmetic spectral transitions and bounds on quantum dynamics for supercritical almost Mathieu operators
(Great Lakes Mathematical Physics Meeting 2016, MSU, June 17-June 19, 2016).
Webpage
- Sharp arithmetic spectral transitions and bounds on quantum dynamics for supercritical almost Mathieu operators
(Simons Center's Workshop: Between Dynamics and Spectral Theory, Stony Brook, New York, June 6-June 10, 2016).
Webpage
- Sharp spectral transitions and exact asymptotics of the eigenfunctions and transfer matrices for the almost Mathieu operator
(The 34th Annual Western States Meeting of Mathematical Physics, Caltech, Feb 15-Feb 16, 2016).
Webpage
- The asymptotics of generalized eigenfunctions of quasiperiodic operators
(KAM Workshop, Fudan University, Jan 8, 2016).
Webpage
- Exact asymptotics of the eigenfunctions and transfer matrices for the almost Mathieu operator
(AMS Fall Western Sectional Meeting, California State University, Fullerton, Oct 24-Oct 25, 2015).
Webpage
- Spectral transitions for quasiperiodic operators
(The Sixth Spectral Theory of Ordinary Differential Operator, NJUST, May 22-May 23, 2015).
Webpage
- Arithmetic Spectral Transitions for the Maryland Model
(The workshop "Almost-Periodic and Other Ergodic Problems", Isaac Newton Institute for Mathematical Sciences, Cambridge,
Apr 7, 2015).
Webpage
- Spectral transitions for quasiperiodic operators
(Doctorial Forum of Mathematics between Fudan and Kyoto University, Fudan University, Shanghai,
Nov 2-Nov 8, 2014).
Webpage
- The Spectral types of the Maryland Model
( USA-Uzbekistan Conference, California State University, Fullerton,
May 19-May 23, 2014).
Webpage
- Some refined results on almost Mathieu operator in exponential regime
(The 32th Annual Western States Meeting of Mathematical Physics, Caltech, Feb 17-Feb 18, 2014).
Webpage
Seminar Talks
- Anderson localization for quasiperiodic operators and related Hamiltonian PDEs (Ergodic Schrödinger Operator Seminar, UCI, April 15, 2019).
Webpage
- Anderson localization for quasiperiodic operators and related Hamiltonian PDEs (Ergodic Schrödinger Operator Seminar, UCI, April 8, 2019).
Webpage
- Spectral transitions for Schrödinger operators with decaying potentials and Laplacians on asymptotically flat (hyperbolic) manifolds
(Nonlinear PDE Seminar, UCI, Oct 26, 2018).
Webpage
- Spectral transitions for Schrödinger operators with decaying potentials and Laplacians on asymptotically flat (hyperbolic) manifolds
(Applied Math & Analysis Seminar, Duke University, Oct 2, 2018).
Webpage
- Sharp spectral transition for the Schrödinger operator and its applications (UESTC, Chengdu, May 17, 2018).
Webpage
- Singular spectra for quasiperiodic operators in positive Lyapunov exponent regime (Dynamics System Seminar, Sichuan University,
May 14, 2018). Webpage
- Embedded eigenvalues for the discrete Schrödinger operator (Ergodic Theory and Spectral Theory Seminar, UCR,
May 4, 2018). Webpage
- Inhomogeneous Diophantine approximation in the coprime setting (Number Theory Seminar, UCI, Nov 16, 2017).
Webpage
- Sharp spectral transition for eigenvalues embedded into the spectral bands
(Mathematical Physics Seminar, UCI, Nov 9, 2017).
Webpage
- Some refined results on mixed Littlewood conjecture for pseudo-absolute values
(Mathematical Physics Seminar, UCI, Aug 3, 2017).
Webpage
- Universal hierarchical (reflective hierarchical) structure of the almost Mathieu eigenfunctions
(Dynamics System Seminar, Sichuan University, June 26, 2017).
Webpage
- The HRT conjecture for almost every (1,3) configuration (Sichuan University, June 23, 2017).
Webpage
- The Littlewood conjecture for pseudo-absolute values (Sichuan University, June 22, 2017).
Webpage
- Sharp spectral transitions and growth of eigenfunctions of Laplacians on Riemannian manifolds
(Dynamics System Seminar, Fudan University, June 19, 2017).
Webpage
- The HRT conjecture for almost every (1,3) configuration (Shanghai Second Polytechnic University, June 18, 2017).
- Noncompact manifolds with embedded singular spectra on their Laplacians (NJUST, Nanjing, June 16, 2017).
Webpage
- Strichartz estimates for endpoint (Ergodic Schrödinger Operator Seminar, UCI, May 1, 2017).
Webpage
- Strichartz estimates for non-endpoint (Ergodic Schrödinger Operator Seminar, UCI, April 24, 2017).
Webpage
- Dispersive and Strichartz estimates for free Laplacians (Ergodic Schrödinger Operator Seminar, UCI, April 18, 2017).
Webpage
- Introduction to limiting absorption principle and its application to spectral theory
(Ergodic Schrödinger Operator Seminar, UCI, Feb 3, 2017).
Webpage
- Growth properties of eigensolutions of Laplacians in higher dimensions
(Ergodic Schrödinger Operator Seminar, UCI, Jan 13, 2017).
Webpage
- Spectral transitions of Laplacians with decaying potentials
(Ergodic Schrödinger Operator Seminar, UCI, Jan 6, 2017).
Webpage
- Arithmetic criteria
for quasiperiodic Schrödinger operators
(Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Dec 21, 2015).
- Dry version of the ten Martini problem
((Mathematical Physics Seminar, UCI, Apr 10, 2014).
Webpage
- Anderson Localization for almost Mathieu operators with Liouville frequencies
((Mathematical Physics Seminar, UCI, Feb 27, 2014).
Webpage
Minicouses
- Green's function estimates for Lattice Schrödinger operators and applications
(Dalian University of Technology, July 15-July 22, 2015).
Webpage
- Spectral theory of quasiperiodic operators
(Suzhou University, Dec 24-Dec 27, 2013).
Webpage
Conferences attended
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Honoring the Life and Work of Jean Bourgain, IAS, May 31-June 1,2019.
Webpage
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The XIX International Congress on Mathematical Physics, Montreal,
Quebec, Canada, July 23 to July 28, 2018. Webpage
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Young Researchers Symposium , Montreal,
Quebec, Canada, July 20 and 21, 2018. Webpage
- PCMI Research Program, Park City, Utah, July 1-19, 2018. Webpage
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Classical and Quantum Motion in Disordered Environment: A Random Event in honour of Ilya Goldsheid's 70-th birthday,
Queen Mary, University of London, Dec 18 to Dec 22, 2017.
Webpage
- 35th Annual Western States Mathematical Physics Meeting, Caltech, Feb 12-Feb 13, 2017.
Webpage
- Frontiers in Mathematical Physics on the Occasion of the 70th Birthday of Barry Simon, Montreal, Canada,
Aug 28-Sep 1, 2016.
Webpage
- Analysis and beyond: celebrating Jean Bourgain’s work and its impact, Princeton, May 21- May 24, 2016.
Webpage
- The Workshop on Hamiltonian dynamical systems,
Fudan University, Jan 04-Jan 10, 2015.
Webpage
Miscellaneous
- With I. Kachkovskiy, we organized 4 working seminars
for Graduate Summer School,
PCMI Summer Sessions, Park City, Utah, July 9-13, 2018. Webpage
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I am a TA for Svetlana Jitomirskaya’s Graduate Summer School minicourse lectures,
PCMI Summer Sessions, Park City, Utah, July 9-13, 2018. Webpage