QUARC: Quantum Research Cubesat—A Constellation for Quantum Communication

A Quantum Constellation

The Italian physicist Ettore Majorana, who disappeared in 1938, is now widely recognized for inventing the notion of a fermionic particle, the Majorana fermion, which has the strange property of being its own antiparticle [1]. What is perhaps less well known is that he also developed a natural and exact representation of a quantum spin [2], which inspired Julian Schwinger to create the bosonic ...

Experimental quantum error rejection for quantum communication.

We report an experimental demonstration of a bit-flip error-rejection protocol for error-reduced transfer of quantum information through a noisy quantum channel. In the experiment, an unknown state to be transmitted is encoded into a two-photon entangled state, which is then sent through an engineered noisy quantum channel. At the final stage, the unknown state is decoded by a parity measuremen...

Spintronics and Quantum Dots for Quantum Computing and Quantum Communication

Control over electron-spin states, such as coherent manipulation, filtering and measurement promises access to new technologies in conventional as well as in quantum computation and quantum communication. We review our proposal of using electron spins in quantum confined structures as qubits and discuss the requirements for implementing a quantum computer. We describe several realizations of on...

Communication and Control for Quantum Circuits Communication and Control for Quantum Circuits Communication and Control for Quantum Circuits

Communication and Control for Quantum Circuits by Yatish Patel Doctor of Philosophy in Computer Science University of California, Berkeley Professor John Kubiatowicz, Chair Quantum computers will potentially be able to solve certain classes of problems more efficiently than possible on a classical computer. Due to the fragility of quantum data, a large scale quantum computer will require a robu...

Quantum Physics: A Case for Anti-Realism?