School of Physical and Mathematical Sciences (SPMS)
Recent Submissions

Interferenceless polarization splitting through nanoscale van der Waals heterostructures
(2018)The ability to control the polarization of light at the extreme nanoscale has long been a major scientific and technological goal for photonics. Here we predict the phenomenon of polarization splitting through van der Waals ... 
Phase locking and quantum statistics in a parametrically driven nonlinear resonator
(2016)We discuss phaselocking phenomenon at lowlevel of quanta and quantum statistics for parametrically driven nonlinear Kerr resonator (PDNR). Oscillatory mode of PDNR is created in the process of a degenerate downconversion ... 
Timeconsistent meanvariance portfolio selection with only risky assets
(2018)Time consistency and optimal diversification criteria are popular in the dynamic portfolio construction in practice. This paper is devoted to the exact analytical solution of the timeconsistent meanvariance portfolio ... 
Isolation of a cyclic (alkyl)(amino)germylene
(2016)A 1,4addition of a dichlorogermylene dioxane complex with α,βunsaturated imine 1 gave a dichlorogermane derivative 2 bearing a GeC3N fivemembered ring skeleton. By reducing 2 with KC8, cyclic (alkyl)(amino)germylene 3 ... 
Divergent ringopening coupling between cyclopropanols and alkynes under cobalt catalysis
(2018)Cobalt–diphosphine catalysts promote ringopening coupling reactions between cyclopropanols and unactivated internal alkynes, affording either βalkenyl ketones or multisubstituted cyclopentenol derivatives in good yields ... 
On lowrisk heavy hitters and sparse recovery schemes
(2018)We study the heavy hitters and related sparse recovery problems in the low failure probability regime. This regime is not wellunderstood, and the main previous work on this is by Gilbert et al. (ICALP'13). We recognize ... 
Lossless dimension expanders via linearized polynomials and subspace designs
(2018)For a vector space F^n over a field F, an (eta,beta)dimension expander of degree d is a collection of d linear maps Gamma_j : F^n > F^n such that for every subspace U of F^n of dimension at most eta n, the image of U ... 
Linear sketching over F2
(2018)We initiate a systematic study of linear sketching over F_2. For a given Boolean function treated as f : F_2^n > F_2 a randomized F_2sketch is a distribution M over d x n matrices with elements over F_2 such that Mx ... 
The complexity of quantum disjointness
(2017)We introduce the communication problem QNDISJ, short for Quantum (Unique) NonDisjointness, and study its complexity under different modes of communication complexity. The main motivation for the problem is that it is a ... 
How long can optimal locally repairable codes be?
(2018)A locally repairable code (LRC) with locality r allows for the recovery of any erased codeword symbol using only r other codeword symbols. A Singletontype bound dictates the best possible tradeoff between the dimension ... 
Fidelity of quantum strategies with applications to cryptography
(2018)We introduce a definition of the fidelity function for multiround quantum strategies, which we call the strategy fidelity, that is a generalization of the fidelity function for quantum states. We provide many interesting ... 
A composition theorem for randomized query complexity
(2018)Let the randomized query complexity of a relation for error probability epsilon be denoted by R_epsilon(). We prove that for any relation f contained in {0,1}^n times R and Boolean function g:{0,1}^m > {0,1}, R_{1/3}(f o ... 
Silanecatalysed fast growth of large singlecrystalline graphene on hexagonal boron nitride
(2015)The direct growth of highquality, large singlecrystalline domains of graphene on a dielectric substrate is of vital importance for applications in electronics and optoelectronics. Traditionally, graphene domains grown ... 
Quantum recommendation systems
(2017)A recommendation system uses the past purchases or ratings of n products by a group of m users, in order to provide personalized recommendations to individual users. The information is modeled as an m \times n preference ... 
Deterministic heavy hitters with sublinear query time
(2018)We study the classic problem of finding l_1 heavy hitters in the streaming model. In the general turnstile model, we give the first deterministic sublineartime sketching algorithm which takes a linear sketch of length ... 
Rhodiumcatalysed C(sp2)–C(sp2) bond formation via C–H/C–F activation
(2015)Fluoroalkenes represent a class of privileged structural motifs, which found widespread use in medicinal chemistry. However, the synthetic access to fluoroalkenes was much underdeveloped with previous reported methods ... 
Microsecond darkexciton valley polarization memory in twodimensional heterostructures
(2018)Transition metal dichalcogenides have valley degree of freedom, which features optical selection rule and spinvalley locking, making them promising for valleytronics devices and quantum computation. For either application, ... 
High pressure Raman study and phase transitions of KIO3 nonlinear optical single crystals
(1998)Potassium iodate KIO3 single crystal samples have been studied under pressure up to 35 GPa at room temperature. Drastic spectral changes and phase transitions were observed. The first phase transition occurs at 5. 0 GPa ... 
Pressureinduced phase transitions of KTiOAsO4 by Raman spectroscopy
(1998)Potassium titanyl orthoarsenate KTiOAsO4 has been studied by Raman spectroscopy up to 16 GPa. Three firstorder pressureinduced phase transitions are inferred from Raman data. The first phase transition takes place at 3. ... 
Nanoscale surface chemistry directs the tunable assembly of silver octahedra into three twodimensional plasmonic superlattices
(2015)A major challenge in nanoparticle selfassembly is programming the largearea organization of a single type of anisotropic nanoparticle into distinct superlattices with tunable packing efficiencies. Here we utilize nanoscale ...