7,027 research outputs found
Workshop in Moodle: a tool for peer critiquing
This paper will begin with a brief discussion of the benefits of peer assessment and peer critiquing. In particular, it will examine how both can be beneficial in
helping to introduce, and reinforce, valuable graduate attributes in students throughout their university careers.
It will then examine the tools available at the University of Glasgow and evaluate them in terms of their strengths and weaknesses. In order to explain this in detail, a real life case study from a third year class in Nursing will be presented. The paper will conclude that, while there are obvious benefits to peer critiquing tools being used with a Virtual Learning Environment (VLE), some modifications
are necessary in order to make them more easily usable by staff and students
Quantum Computation with Coherent States, Linear Interactions and Superposed Resources
We show that quantum computation circuits with coherent states as the logical
qubits can be constructed using very simple linear networks, conditional
measurements and coherent superposition resource states
Entangled Coherent State Qubits in an Ion Trap
We show how entangled qubits can be encoded as entangled coherent states of
two-dimensional centre-of-mass vibrational motion for two ions in an ion trap.
The entangled qubit state is equivalent to the canonical Bell state, and we
introduce a proposal for entanglement transfer from the two vibrational modes
to the electronic states of the two ions in order for the Bell state to be
detected by resonance fluorescence shelving methods.Comment: 4 pages, No figures, accepted to PRA, minor chang
Practical limitations in optical entanglement purification
Entanglement purification protocols play an important role in the
distribution of entangled systems, which is necessary for various quantum
information processing applications. We consider the effects of photo-detector
efficiency and bandwidth, channel loss and mode-mismatch on the operation of an
optical entanglement purification protocol. We derive necessary detector and
mode-matching requirements to facilitate practical operation of such a scheme,
without having to resort to destructive coincidence type demonstrations.Comment: 4 pages, 4 figure
The entanglement beam splitter: a quantum-dot spin in a double-sided optical microcavity
We propose an entanglement beam splitter (EBS) using a quantum-dot spin in a
double-sided optical microcavity. In contrast to the conventional optical beam
splitter, the EBS can directly split a photon-spin product state into two
constituent entangled states via transmission and reflection with high fidelity
and high efficiency (up to 100 percent). This device is based on giant optical
circular birefringence induced by a single spin as a result of cavity quantum
electrodynamics and the spin selection rule of trion transition (Pauli
blocking). The EBS is robust and it is immune to the fine structure splitting
in a realistic quantum dot. This quantum device can be used for
deterministically creating photon-spin, photon-photon and spin-spin
entanglement as well as a single-shot quantum non-demolition measurement of a
single spin. Therefore, the EBS can find wide applications in quantum
information science and technology.Comment: 7 pages, 5 figure
Entangling photons using a charged quantum dot in a microcavity
We present two novel schemes to generate photon polarization entanglement via
single electron spins confined in charged quantum dots inside microcavities.
One scheme is via entangled remote electron spins followed by
negatively-charged exciton emissions, and another scheme is via a single
electron spin followed by the spin state measurement. Both schemes are based on
giant circular birefringence and giant Faraday rotation induced by a single
electron spin in a microcavity. Our schemes are deterministic and can generate
an arbitrary amount of multi-photon entanglement. Following similar procedures,
a scheme for a photon-spin quantum interface is proposed.Comment: 4 pages, 4 figure
Quantum computation with optical coherent states
We show that quantum computation circuits using coherent states as the
logical qubits can be constructed from simple linear networks, conditional
photon measurements and "small" coherent superposition resource states
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