Multi-dimensional photonic states from a quantum dot

  title={Multi-dimensional photonic states from a quantum dot},
  author={J. P. Lee and Anthony J. Bennett and R. Mark Stevenson and David J. P. Ellis and Ian Farrer and David A. Ritchie and Andrew J. Shields},
© 2018 IOP Publishing Ltd. Quantum states superposed across multiple particles or degrees of freedom offer an advantage in the development of quantum technologies. Creating these states deterministically and with high efficiency is an ongoing challenge. A promising approach is the repeated excitation of multi-level quantum emitters, which have been shown to naturally generate light with quantum statistics. Here we describe how to create one class of higher dimensional quantum state, a so called… 

Figures and Tables from this paper

Picosecond pulse shaping of single photons using quantum dots
Control of the single-photon pulse shape in a solid-state system on a timescale much shorter than the radiative lifetime is demonstrated, in addition to control of the frequency and bandwidth.
Generation of Non‐Classical Light Using Semiconductor Quantum Dots
Sources of non‐classical light are of paramount importance for future applications in quantum science and technology such as quantum communication, quantum computation and simulation, quantum
Efficient demultiplexed single-photon source with a quantum dot coupled to a nanophotonic waveguide
Planar nanostructures allow near-ideal extraction of emission from a quantum emitter embedded within, thereby realizing deterministic single-photon sources. Such a source can be transformed into M
Controllable Photonic Time-Bin Qubits from a Quantum Dot
Photonic time bin qubits are well suited to transmission via optical fibres and waveguide circuits. The states take the form $\frac{1}{\sqrt{2}}(\alpha \ket{0} + e^{i\phi}\beta \ket{1})$, with
On-demand semiconductor source of 780-nm single photons with controlled temporal wave packets
We report on a fast, bandwidth-tunable single-photon source based on an epitaxial GaAs quantum dot. Exploiting spontaneous spin-flip Raman transitions, single photons at 780 nm are generated on
Adiabatically preparing quantum dot spin states in the Voigt geometry
We use mutually delayed and partially overlapping optical pulses, similar to those used in stimulated Raman adiabatic passage and its variations, for the coherent control of quantum dot spin states
Cavity-Enhanced Raman Emission from a Single Color Center in a Solid.
The cavity enables an unprecedented frequency tuning range of the Raman emission that significantly exceeds the spectral inhomogeneity of silicon-vacancy centers in diamond nanostructures and selectively suppresses the phonon-induced spontaneous emission that degrades the efficiency of Raman photon generation.
The Development of Quantum Emitters Based on Semiconductor Quantum Dots
Quantum emitters serve as the building blocks of quantum network, connecting quantum computing, quantum communication, and quantum metrology. Quantum dots (QDs) are widely considered as the best
Efficient Quantum Voting with Information-Theoretic Security
A parallel version of the Celada–Kabiboulline–Bregaard–Lukin cellular automaton, simulating the dynamic response of the immune system to injury, is described.
Novel color center platforms enabling fundamental scientific discovery
Color centers are versatile systems that generate quantum light, sense magnetic fields and produce spin-photon entanglement. We review how these properties have pushed the limits of fundamental


Time-bin entangled photons from a quantum dot
This work reports the realization of a source of time-bin entangled photon pairs utilizing the biexciton-exciton cascade in a III/V self-assembled quantum dot and analyses the generated photon pairs by an inherently phase-stable interferometry technique, facilitating uninterrupted long integration times.
Cavity-enhanced coherent light scattering from a quantum dot
A microcavity enhances the efficiency of resonant photon scattering, generating pure indistinguishable single photons, and deterministic excitation is used to create two-photon N00N states with which to make superresolving phase measurements in a photonic circuit.
Deterministic and electrically tunable bright single-photon source
A novel photonic structure and a technology allowing the deterministic implementation of electrical control for a quantum dot in a microcavity are presented and a deterministic and electrically tunable single-photon source with an extraction efficiency is demonstrated.
Linear optical quantum computing in a single spatial mode.
This work presents a scheme for linear optical quantum computing using time-bin-encoded qubits in a single spatial mode, providing a sufficient set of operations for universal quantum computing with the Knill-Laflamme-Milburn scheme.
Why I am optimistic about the silicon-photonic route to quantum computing
This is a short overview explaining how building a large-scale, silicon-photonic quantum computer has been reduced to the creation of good sources of 3-photon entangled states (and may simplify
A photon–photon quantum gate based on a single atom in an optical resonator
Strong light–matter coupling provided by a single atom in a high-finesse optical resonator is used to realize the Duan–Kimble protocol of a universal controlled phase flip (π phase shift) photon–photon quantum gate, which has the capability of conditional polarization flipping as well as entanglement generation between independent input photons.
Cavity-stimulated Raman emission from a single quantum dot spin
Solid-state quantum emitters have shown strong potential for applications in quantum information, but the spectral inhomogeneity of these emitters poses a significant challenge. We address this issue
Deterministic generation of a cluster state of entangled photons
This work uses semiconductor quantum dots to deterministically generate long strings of polarization-entangled photons in a cluster state by periodic timed excitation of a precessing matter qubit, and produces strings of hundreds of photons in which the entanglement persists over five sequential photons.
Direct generation of photon triplets using cascaded photon-pair sources
The observation of photon triplets generated by cascaded down-conversion is reported, which will allow experimental interrogation of novel quantum correlations, the generation of tripartite entanglement without post-selection and thegeneration of heralded entangled photon pairs suitable for linear optical quantum computing.
Observation of entanglement between a quantum dot spin and a single photon
The observation of quantum entanglement between a semiconductor quantum dot spin and the colour of a propagating optical photon constitutes a first step towards implementation of a quantum network with nodes consisting of semiconductor spin quantum bits.