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27 papers · 2 filters
Finite de Finetti theorem for conditional probability distributions describing physical theories
Matthias Christandl, Ben Toner
We work in a general framework where the state of a physical system is defined by its behaviour under measurement and the global state is constrained by no-signalling conditions. W…
Complementarity of Private and Correctable Subsystems in Quantum Cryptography and Error Correction
Dennis Kretschmann, David W. Kribs, Robert W. Spekkens
We make an explicit connection between fundamental notions in quantum cryptography and quantum error correction. Error-correcting subsystems (and subspaces) for quantum channels ar…
The resource theory of quantum reference frames: manipulations and monotones
Gilad Gour, Robert W. Spekkens
Every restriction on quantum operations defines a resource theory, determining how quantum states that cannot be prepared under the restriction may be manipulated and used to circu…
Weak measurement takes a simple form for cumulants
Graeme Mitchison
A weak measurement on a system is made by coupling a pointer weakly to the system and then measuring the position of the pointer. If the initial wavefunction for the pointer is rea…
Quantum key distribution using a triggered quantum dot source emitting near 1.3 microns
P. M. Intallura, M. B. Ward, O. Z. Karimov +5
We report the distribution of a cryptographic key, secure from photon number splitting attacks, over 35 km of optical fiber using single photons from an InAs quantum dot emitting ~…
Negativity and contextuality are equivalent notions of nonclassicality
Robert W. Spekkens
Two notions of nonclassicality that have been investigated intensively are: (i) negativity, that is, the need to posit negative values when representing quantum states by quasiprob…