Ushnish Ray

"Every man of science whose outlook is truly scientific is ready to admit that what passes for scientific knowledge at the moment is sure to require correction with the progress of discovery; nevertheless, it is near enough to the truth to serve for most practical purposes, though not for all. In science, where alone something approximating to genuine knowledge is to be found, men’s attitude is tentative and full of doubt."

-- Bertrand Russell

The major publications are listed below. Details are discussed in the actual papers that have been linked.

(* indicates co-first authorship, names arranged alphabetically.)

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1. Zhi-Hao Cui, Chong Sun, Ushnish Ray, Bo-Xiao Zheng, Qiming Sun, Garnet Kin-Lic Chan, “Ground-state phase diagram of the three-band Hubbard model in various parametrizations from density matrix embedding theory”, Phys. Rev. Research 2, 043259 (2020).
    

2. Mario Motta, Claudio Genovese, Fengjie Ma, Zhi-Hao Cui, Randy Sawaya, Garnet Kin-Lic Chan, Natalia Chepiga, Phillip Helms, Carlos Jiménez-Hoyos, Andrew J Millis, Ushnish Ray, Enrico Ronca, Hao Shi, Sandro Sorella, Edwin M Stoudenmire, Steven R White, Shiwei Zhang, “Ground-state properties of the hydrogen chain: Dimerization, insulator-to-metal transition, and magnetic phases”, Phys. Rev. X 10, 031058 (2020).
    

3. Kiel T. Williams, Yuan Yao, Jia Li, Li Chen, Hao Shi, Mario Motta, Chunyao Niu, Ushnish Ray, Sheng Guo, Robert J. Anderson, Junhao Li, Lan Nguyen Tran, Chia-Nan Yeh, Bastien Mussard, Sandeep Sharma, Fabien Bruneval, Mark van Schilfgaarde, George H. Booth, Garnet Chan, Shiwei Zhang, Emanuel Gull, Dominika Zgid, Andrew Millis, C. J. Umrigar, Lucas K. Wagner, “Direct comparison of many-body methods for realistic electronic Hamiltonians”, Phys. Rev. X 10, 011041 (2020).
    

4. Ushnish Ray and Garnet Kin-Lic Chan, "Constructing Auxiliary Dynamics for Nonequilibrium Stationary States by Variance Minimization", J. Chem. Phys., 152, 104107 (2020).
   (​Selected as Editor's Picks and website front-page article, 12 March 2020.)
    

5. Chong Sun, Ushnish Ray, Zhi-Hao Cui, Miles Stoudenmire, Michel Ferrero and Garnet Kin-Lic Chan, "Finite temperature density matrix embedding theory", Phys. Rev. B 101, 075131 (2020).
    

6. Ushnish Ray and David T. Limmer, "Heat current fluctuations and anomalous transport in low-dimensional carbon lattices", Phys. Rev. B 100, 241409(R) (2019). (Selected as Rapid Communications.)
    

7. Phillip Helms, Ushnish Ray, Garnet Kin-Lic Chan​​, “Dynamic phase behavior of the single- and multi-lane asymmetric simple exclusion process via matrix product states”, Phys. Rev. E 100, 022101 (2019).
    

8. Bruno R. de Abreu, Ushnish Ray, Silvio A. Vitiello, David M. Ceperley​​, "Properties of the Superfluid in the Disordered Bose-Hubbard Model", Phys. Rev. A 98, 023628 (2018).
    

9. Ushnish Ray, Garnet Kin-Lic Chan, David T. Limmer, "Exact fluctuations of nonequilibrium steady states from approximate auxiliary dynamics", Phys. Rev. Lett. 120, 210602 (2018).

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10. Ushnish Ray, Garnet Kin-Lic Chan, David T. Limmer, "Importance sampling large deviations in nonequilibrium steady states: Part 1", J. Chem. Phys., 148 (12), 124120 (2018).

    (​Selected as Editor's Picks and website front-page article, 29 March 2018.)
     

11. ​Mario Motta, David M. Ceperley, Garnet Kin-Lic Chan, John A. Gomez, Emanuel Gull, Sheng Guo, Carlos Jimenez-Hoyos, Tran Nguyen Lan, Jia Li, Fengjie Ma, Andrew J. Millis, Nikolay V. Prokof'ev, Ushnish Ray, Gustavo E. Scuseria, Sandro Sorella, Edwin M. Stoudenmire, Qiming Sun, Igor S. Tupitsyn, Steven R. White, Dominika Zgid, Shiwei Zhang, "Towards the solution of the many-electron problem in real materials: equation of state of the hydrogen chain with state-of-the-art many-body methods", Phys. Rev. X 7, 031059 (2017).
     

12. Carolyn Meldgin*, Ushnish Ray*, Phillip Russ, David Chen, David Ceperley and Brian DeMarco, “Probing the Superfluid to Bose-glass Transition using Quantum Quenches of Disorder”, Nature Phys., 1–4. http://doi.org/10.1038/nphys3695 (2016). (Selected as cover for Nature Physics, June 2016.)
     

13. Ushnish Ray, Properties of Dirty Bosons in Disordered Optical Lattices (Doctoral dissertation), University of Illinois at Urbana-Champaign (2015).​​
     

14. David McKay*, Ushnish Ray*, Stefan Natu, Phillip Russ, David Ceperley and Brian DeMarco, “Metastable Bose-Einstein Condensation in a Strongly Correlated Optical Lattice”, Phys. Rev. A 91, 023625 (2015). (Selected as Editor’s Suggestion.)
     

15. Ushnish Ray and David Ceperley, “Revealing the Condensate and Non-condensate Distributions in the Inhomogeneous Bose-Hubbard Model”, Phys. Rev. A 87, 051603R (2013). (Selected as Rapid Communications.)
     

16. Ken Segall, Dan Schult, Ushnish Ray, Toshiro Ohsumi, “Numerical simulation of thermal noise in Josephson circuits”, arXiv:1110.0172 (2011).
     

17. Seo Ho Youn, Mingwu Lu, Ushnish Ray, and Benjamin L. Lev, “Dysprosium magneto-optical traps”, Phys. Rev. A 82, 043425 (2010).

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18. E. J. Galvez, M. Malik, B. Melius, B. Gadway, and U. Ray, "Measurements of Phase Correlations between Polarization-Entangled Photons", International Conference on Quantum Information, OSA Technical Digest (CD), Optical Society of America, paper JWC46, (2007).