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4 papers · 2 filters
A comparative code study for quantum fault-tolerance
Andrew W. Cross, David P. DiVincenzo, Barbara M. Terhal
We study a comprehensive list of quantum codes as candidates of codes to be used at the bottom, physical, level in a fault-tolerant code architecture. Using the Aliferis-Gottesman-…
Quantum private queries
Vittorio Giovannetti, Seth Lloyd, Lorenzo Maccone
We propose a cheat sensitive quantum protocol to perform a private search on a classical database which is efficient in terms of communication complexity. It allows a user to retri…
Quantum random access memory
Vittorio Giovannetti, Seth Lloyd, Lorenzo Maccone
A random access memory (RAM) uses n bits to randomly address N=2^n distinct memory cells. A quantum random access memory (qRAM) uses n qubits to address any quantum superposition o…
Controllability of the coupled spin-half harmonic oscillator system
Haidong Yuan, Seth Lloyd
We present a control-theoretic analysis of the system consisting of a two-level atom coupled with a quantum harmonic oscillator. We show that by applying external fields with just…