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Modifying quantum optical states by zero-photon subtraction
C. M. Nunn, J. D. Franson, T. B. Pittman
The process of single-photon subtraction (SPS) is known to dramatically alter the properties of certain quantum optical states. Somewhat surprisingly, subtracting zero photons can…
Coherence of Quantum States after Noiseless Attenuation
S. U. Shringarpure, C. M. Nunn, T. B. Pittman +1
Attenuating a quantum state using a beam splitter will introduce noise and decoherence. Here we show that heralding techniques can be used to attenuate Schrödinger cat states and s…
Error sources in heralded quantum Zeno gates
I. C. Nodurft, J. D. Franson
Quantum logic gates for photonic qubits can be implemented using the quantum Zeno effect based on strong two-photon absorption. The fidelity of quantum Zeno gates of this kind may…
Destructive Controlled-Phase Gate Using Linear Optics
S. U. Shringarpure, J. D. Franson
Knill, Laflamme, and Milburn [Nature 409, 46 (2001)] showed that linear optics techniques could be used to implement a nonlinear sign gate. They also showed that two of their nonli…
Third quantization of the electromagnetic field
J. D. Franson
We consider an approach in which the usual wave function in the quadrature representation of mode j of the electromagnetic field is further quantized to produce a field operator. S…