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Quantum Repeater with Encoding
(American Physical Society, 2009)
We propose an approach to implement quantum repeaters for long-distance quantum communication. Our protocol generates a backbone of encoded Bell pairs and uses the procedure of classical error correction during simultaneous ...
Global Operations For Protected Quantum Memories In Atomic Spin Lattices
(2009)
Quantum information processed in strongly correlated states of matter can provide built in hardware protection against errors. We may encode information in highly non local degrees of freedom, such as using three dimensional ...
Scalable Architecture for a Room Temperature Solid-State Quantum Information Processor
(Nature Publishing Group, 2012)
The realization of a scalable quantum information processor has emerged over the past decade as one of the central challenges at the interface of fundamental science and engineering. Here we propose and analyse an ...
Imaging Mesoscopic Nuclear Spin Noise with a Diamond Magnetometer
(American Institute of Physics, 2010)
Magnetic resonance imaging can characterize and discriminate among tissues using their diverse physical and biochemical properties. Unfortunately, submicrometer screening of biological specimens is presently not possible, ...
Environment-Assisted Precision Measurement
(American Physical Society, 2011)
We describe a method to enhance the sensitivity of precision measurements that takes advantage of the environment of a quantum sensor to amplify the response of the sensor to weak external perturbations. An individual qubit ...
Coherence And Control Of Quantum Registers Based On Electronic Spin In A Nuclear Spin Bath
(American Physical Society, 2009)
We consider a protocol for the control of few-qubit registers comprising one electronic spin embedded in a nuclear spin bath. We show how to isolate a few proximal nuclear spins from the rest of the bath and use them as ...
Coherence of an Optically Illuminated Single Nuclear Spin Qubit
(American Physical Society, 2008)
We investigate the coherence properties of individual nuclear spin quantum bits in diamond [Dutt et al., Science, 316, 1312 (2007)] when a proximal electronic spin associated with a nitrogen-vacancy (NV) center is being ...
Preparation of decoherence-free cluster states with optical superlattices
(Ameican Physical Society, 2009)
We present a protocol to prepare decoherence-free cluster states using ultracold atoms loaded in a two dimensional superlattice. The superlattice geometry leads to an array of 2×2 plaquettes, each of them holding four ...
Fast Entanglement Distribution with Atomic Ensembles and Fluorescent Detection
(American Physical Society, 2010)
Quantum repeaters based on atomic ensemble quantum memories are promising candidates for achieving scalable distribution of entanglement over long distances. Recently, important experimental progress has been made toward ...
Robust Quantum State Transfer in Random Unpolarized Spin Chains
(American Physical Society, 2011)
We propose and analyze a new approach for quantum state transfer between remote spin qubits. Specifically, we demonstrate that coherent quantum coupling between remote qubits can be achieved via certain classes of random, ...