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12 papers · 2 filters
Generation of Total Angular Momentum Eigenstates in Remote Qubits
A. Maser, U. Schilling, T. Bastin +3
We propose a scheme enabling the universal coupling of angular momentum of remote noninteracting qubits using linear optical tools only. Our system consists of single-photo…
Quantum error correction beyond qubits
Takao Aoki, Go Takahashi, Tadashi Kajiya +4
Quantum computation and communication rely on the ability to manipulate quantum states robustly and with high fidelity. Thus, some form of error correction is needed to protect fra…
A note on quantum error correction with continuous variables
Peter van Loock
We demonstrate that continuous-variable quantum error correction based on Gaussian ancilla states and Gaussian operations (for encoding, syndrome extraction, and recovery) can be v…
Photon-Photon Entanglement with a Single Trapped Atom
B. Weber, H. P. Specht, T. Mueller +4
An experiment is performed where a single rubidium atom trapped within a high-finesse optical cavity emits two independently triggered entangled photons. The entanglement is mediat…
Creation of a quantum oscillator by classical control
Stefan Danilishin, Helge Müller-Ebhardt, Henning Rehbein +7
As a pure quantum state is being approached via linear feedback, and the occupation number approaches and eventually goes below unity, optimal control becomes crucial. We obtain th…
Comparative study of semiclassical approaches to quantum dynamics
G. Schubert, V. S. Filinov, K. Matyash +2
Quantum states can be described equivalently by density matrices, Wigner functions or quantum tomograms. We analyze the accuracy and performance of three related semiclassical appr…