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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 ...
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 ...
Strong Magnetic Coupling Between an Electronic Spin Qubit and a Mechanical Resonator
(American Physical Society, 2009)
We describe a technique that enables a strong coherent coupling between a single electronic spin qubit associated with a nitrogen-vacancy impurity in diamond and the quantized motion of a magnetized nanomechanical resonator ...
Coherent Quantum Optical Control with Subwavelength Resolution
(American Physical Society, 2008)
We suggest a new method for quantum optical control with nanoscale resolution. Our method allows for coherent far-field manipulation of individual quantum systems with spatial selectivity that is not limited by the wavelength ...
Repetitive Readout of a Single Electronic Spin via Quantum Logic with Nuclear Spin Ancillae
(American Association for the Advancement of Science (AAAS), 2009)
Robust measurement of single quantum bits plays a key role in the realization of quantum computation and communication as well as in quantum metrology and sensing. We have implemented a method for the improved readout of ...