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Experimental Quantum Cryptography
Initial results from an apparatus and protocol designed to implement quantum public key distribution are described, by which two users exchange a random quantum transmission, consisting of very faint flashes of polarized light, which remains secure against an adversary with unlimited computing power. Expand
Entanglement-assisted capacity of a quantum channel and the reverse Shannon theorem
In the classical analog of entanglement-assisted communication - communication over a discrete memoryless channel (DMC) between parties who share prior random information - one parameter is sufficient, i.e., that in the presence of prior shared random information, all DMCs of equal capacity can simulate one another with unit asymptotic efficiency. Expand
Quantum nonlocality without entanglement
We exhibit an orthogonal set of product states of two three-state particles that nevertheless cannot be reliably distinguished by a pair of separated observers ignorant of which of the states hasExpand
Unextendible product bases and bound entanglement
An unextendible product basis( UPB) for a multipartite quantum system is an incomplete orthogonal product basis whose complementary subspace contains no product state. We give examples of UPBs, andExpand
Open Quantum Assembly Language
This document describes a quantum assembly language (QASM) called OpenQASM that is used to implement experiments with low depth quantum circuits. OpenQASM represents universal physical circuits overExpand
Exact and asymptotic measures of multipartite pure-state entanglement
Hoping to simplify the classification of pure entangled states of multi $(m)\ensuremath{-}\mathrm{p}\mathrm{a}\mathrm{r}\mathrm{t}\mathrm{i}\mathrm{t}\mathrm{e}$ quantum systems, we study exactly andExpand
Entanglement-Assisted Classical Capacity of Noisy Quantum Channels
Prior entanglement between sender and receiver, which exactly doubles the classical capacity of a noiseless quantum channel, can increase the classical capacity of some noisy quantum channels by anExpand
Characterization of addressability by simultaneous randomized benchmarking.
A benchmarking protocol is introduced that provides information about the amount of addressability present in the system and is implemented on coupled superconducting qubits to agree with predictions based on simple models of the classical cross talk and Stark shifts. Expand
We present a family of additive quantum error-correcting codes whose capacities exceed those of quantum random coding (hashing) for very noisy channels. These codes provide nonzero capacity in aExpand
Evidence for bound entangled states with negative partial transpose
We exhibit a two-parameter family of bipartite mixed states ${\ensuremath{\rho}}_{\mathrm{bc}},$ in a $d\ensuremath{\bigotimes}d$ Hilbert space, which are negative under partial transposition (NPT),Expand