Ignacio Cirac

Scalable architecture for a room temperature solid-state quantum information processor

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 architecture for a scalable, solid-state quantum information processor capable of operating at room temperature. Our approach is based on recent experimental advances involving nitrogen-vacancy colour centres in diamond. In particular, we demonstrate that the multiple challenges associated with operation at ambient temperature, individual addressing at the nanoscale, strong qubit coupling, robustness against disorder and low decoherence rates can be simultaneously achieved under realistic, experimentally relevant conditions. The architecture uses a novel approach to quantum information transfer and includes a hierarchy of control at successive length scales. Moreover, it alleviates the stringent constraints currently limiting the realization of scalable quantum processors and will provide fundamental insights into the physics of non-equilibrium many-body quantum systems.

Operational criterion and constructive checks for the separability of low-rank density matrices

We consider low-rank density operators

Order Parameter for Symmetry-Protected Phases in One Dimension

\ensuremath{\varrho}

Nuclear Spin Cooling Using Overhauser-Field Selective Coherent Population Trapping

supported on a

Entanglement Generated by Dissipation

M\ifmmode\times\else\texttimes\fi{}N

Acoustic Traps and Lattices for Electrons in Semiconductors

Hilbert space for arbitrary M and N

Efficient quantum computation in a network with probabilistic gates and logical encoding

(Ml~N),

The Development of Quantum Hardware for Quantum Computing

and with a positive partial transpose (PPT)

Quantum Teleportation of Dynamics and Effective Interactions between Remote Systems

{\ensuremath{\varrho}}^{{T}_{A}}g~0.

Atomic self-organization around tappered nano fibers

For rank