Engineered photonic qubits for integrated optical quantum computing networks
Lead Research Organisation:
University of Southampton
Department Name: Optoelectronics Research Ctr (closed)
Abstract
Quantum Information Processing employs the laws of quantum mechanics which apply to individual atoms or photons for example to advance the technology underlying current computers and communication systems such as the internet in an essential way. If realized it would allow for much faster computation and would for example threathen the security of current cryptographic schemes for secret communication. It also offers the potential many novel communication schemes including novel cryptographic schemes that are unconditionally secure, even against quantum information processing. A variety of candidate technologies, such as ion traps, optical lattices, quantum dots, superconducting devices and in particular photons, are currently being explored as candidates for the experimental implementation of quantum information processing and quantum communication. In this context photon based implementations play a particularly important role as they represent ideal carriers of quantum information. Any quantum communication network or distributed quantum information processing device would require the ability to manipulate photonic degrees of freedom coherently at the single photon level. For longer distance communication the unavoidable noise and absorption processes would require the use of quantum repeaters to refresh the quantum information. Repeaters for such a photon-based system would require the ability for small scale photon based quantum information processing.The proposed project aims to implement the required technology employing highly integrated optics devices rather than the more traditional bulk optics approach where one arranges individual optical elements on an optical table. This approach avoids many of the problems that bulk optics suffers and also permits more general ways to code and manipulate information. We aim to explore the use of this novel technology for quantum information processing both experimentally and theoretically to develop novel methods for quantum information processing and to demonstrate the feasibility of basic quantum information processing in such arrangements.
People |
ORCID iD |
Peter Smith (Principal Investigator) | |
Neil Broderick (Co-Investigator) |
Publications
Calkins B.
(2013)
High quantum efficiency photon-number-resolving detector for photonic on-chip information processing
in CLEO: QELS_Fundamental Science, CLEO:QELS FS 2013
Rogers H
(2012)
Analysis of Dispersion Characteristics of Planar Waveguides via Multi-Order Interrogation of Integrated Bragg Gratings
in IEEE Photonics Journal
Kundys D
(2009)
Use of Cross-Couplers to Decrease Size of UV Written Photonic Circuits
in IEEE Photonics Technology Letters
Holmes C
(2015)
Direct UV written planar Bragg gratings that feature zero fluence induced birefringence
in Measurement Science and Technology
Metcalf BJ
(2013)
Multiphoton quantum interference in a multiport integrated photonic device.
in Nature communications
Metcalf B
(2014)
Quantum teleportation on a photonic chip
in Nature Photonics
Spring J
(2017)
Chip-based array of near-identical, pure, heralded single-photon sources
in Optica
Calkins B
(2013)
High quantum-efficiency photon-number-resolving detector for photonic on-chip information processing.
in Optics express
Lynch SG
(2016)
External cavity diode laser based upon an FBG in an integrated optical fiber platform.
in Optics express
Carpenter LG
(2015)
Nanoscale roughness micromilled silica evanescent refractometer.
in Optics express
Holmes C
(2014)
Planarised optical fiber composite using flame hydrolysis deposition demonstrating an integrated FBG anemometer.
in Optics express
Smith BJ
(2009)
Phase-controlled integrated photonic quantum circuits.
in Optics express
Snow B. D.
(2007)
Line defects and temperature effects in liquid crystal tunable planar Bragg gratings
in OPTICS EXPRESS
Cooper PA
(2014)
Integrated optical dual-cantilever arrays in silica on silicon.
in Optics express
Rogers Helen L.
(2010)
In situ loss measurement of direct UV-written waveguides using integrated Bragg gratings
in OPTICS LETTERS
Sima Chaotan
(2013)
Phase controlled integrated interferometric single-sideband filter based on planar Bragg gratings implementing photonic Hilbert transform
in OPTICS LETTERS
Spring JB
(2013)
Boson sampling on a photonic chip.
in Science (New York, N.Y.)
Kalli K
(2015)
Flat fibre and femtosecond laser technology as a novel photonic integration platform for optofluidic based biosensing devices and lab-on-chip applications: Current results and future perspectives
in Sensors and Actuators B: Chemical
Description | Within the project we demonstrated that phase controlled photonic circuits offered a reliable route for creating quantum circuitry, showing NOON state interference and non-classical results. Within the work significant challenges were met and overcome in terms of coupling multiple optical modes into circuitry, and it advanced the state-of-the-art. |
Exploitation Route | Planar waveguide circuitry of the sort developed within the project has found application at the Southampton University spin-out Stratophase and we have recently supplied circuits to a Japanese technology major and into a European space agency project. Following on from the project we have continued to collaborate, resulting in new work with National Institute of Standards and Testing at Boulder and our collaborators in Oxford. This has led to new grant applications and to the first demonstration of photon counting detection 1550nm with an on-chip detector. |
Sectors | Manufacturing/ including Industrial Biotechology |
URL | http://www.orc.soton.ac.uk |
Description | Hewlett Packard Ltd |
Organisation | Hewlett Packard Ltd |
Country | United Kingdom |
Sector | Private |
Start Year | 2006 |