7 research outputs found
Blueprint for a Scalable Photonic Fault-Tolerant Quantum Computer
Photonics is the platform of choice to build a modular, easy-to-network
quantum computer operating at room temperature. However, no concrete
architecture has been presented so far that exploits both the advantages of
qubits encoded into states of light and the modern tools for their generation.
Here we propose such a design for a scalable and fault-tolerant photonic
quantum computer informed by the latest developments in theory and technology.
Central to our architecture is the generation and manipulation of
three-dimensional hybrid resource states comprising both bosonic qubits and
squeezed vacuum states. The proposal enables exploiting state-of-the-art
procedures for the non-deterministic generation of bosonic qubits combined with
the strengths of continuous-variable quantum computation, namely the
implementation of Clifford gates using easy-to-generate squeezed states.
Moreover, the architecture is based on two-dimensional integrated photonic
chips used to produce a qubit cluster state in one temporal and two spatial
dimensions. By reducing the experimental challenges as compared to existing
architectures and by enabling room-temperature quantum computation, our design
opens the door to scalable fabrication and operation, which may allow photonics
to leap-frog other platforms on the path to a quantum computer with millions of
qubits.Comment: 38 pages, many figures. Comments welcom
Dynamic Full-Field Infrared Imaging with Multiple Synchrotron Beams
Microspectroscopic
imaging in the infrared (IR) spectral region
allows for the examination of spatially resolved chemical composition
on the microscale. More than a decade ago, it was demonstrated that
diffraction-limited spatial resolution can be achieved when an apertured,
single-pixel IR microscope is coupled to the high brightness of a
synchrotron light source. Nowadays, many IR microscopes are equipped
with multipixel Focal Plane Array (FPA) detectors, which dramatically
improve data acquisition times for imaging large areas. Recently,
progress been made toward efficiently coupling synchrotron IR beamlines
to multipixel detectors, but they utilize expensive and highly customized
optical schemes. Here we demonstrate the development and application
of a simple optical configuration that can be implemented on most
existing synchrotron IR beamlines to achieve full-field IR imaging
with diffraction-limited spatial resolution. Specifically, the synchrotron
radiation fan is extracted from the bending magnet and split into
four beams that are combined on the sample, allowing it to fill a
large section of the FPA. With this optical configuration, we are
able to oversample an image by more than a factor of 2, even at the
shortest wavelengths, making image restoration through deconvolution
algorithms possible. High chemical sensitivity, rapid acquisition
times, and superior signal-to-noise characteristics of the instrument
are demonstrated. The unique characteristics of this setup enabled
the real-time study of heterogeneous chemical dynamics with diffraction-limited
spatial resolution for the first time