843 citations · 3.6k across the 103 of their papers we have counts for
6 papers · 2 filters
Supercatalysis
Somshubhro Bandyopadhyay, Vwani Roychowdhury
We show that entanglement-assisted transformations of bipartite entangled states can be more efficient than catalysis [D. Jonathan and M. B. Plenio, Phys. Rev. Lett. 83, 3566 (1999…
Algorithmic Cooling and Scalable NMR Quantum Computers
P. Oscar Boykin, Tal Mor, Vwani Roychowdhury +2
We present here algorithmic cooling (via polarization-heat-bath)- a powerful method for obtaining a large number of highly polarized spins in liquid nuclear-spin systems at finite…
Partial recovery of entanglement in bipartite entanglement transformations
Somshubhro Bandyopadhyay, Vwani Roychowdhury, Farrokh Vatan
Any deterministic bipartite entanglement transformation involving finite copies of pure states and carried out using local operations and classical communication (LOCC) results in…
Quantum Formulas: a Lower Bound and Simulation
Vwani P. Roychowdhury, Farrokh Vatan
We show that Nechiporuk's method for proving lower bounds for Boolean formulas can be extended to the quantum case. This leads to an lower bound for quantum for…
A classification of incomparable states
Spmshubhro Bandyopadhyay, Vwani P. Roychowdhury, Ujjwal Sen
Let (\{| ψ> ,| ϕ>}) be an incomparable pair of states ((| ψ\nleftrightarrow | ϕ>)), \emph, i.e., (| ψ>) and (| ϕ>) cannot be transformed to each other with probability one by local…
A new proof for the existence of mutually unbiased bases
Somshubhro Bandyopadhyay, P. Oscar Boykin, Vwani Roychowdhury +1
We develop a strong connection between maximally commuting bases of orthogonal unitary matrices and mutually unbiased bases. A necessary condition of the existence of mutually unbi…