440 citations · 4k across the 81 of their papers we have counts for
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Experimental storage of photonic polarization entanglement in a broadband loop-based quantum memory
C. J. Evans, C. M. Nunn, S. W. L. Cheng +2
We describe an experiment in which one member of a polarization-entangled photon pair is stored in an active "loop and switch" type quantum memory device, while the other propagate…
Inhibiting phase drift in multi-atom clocks using the quantum Zeno effect
S. U. Shringarpure, J. D. Franson
The accuracy of an atomic clock depends in part on the bandwidth of the relevant atomic transitions. Here we consider an ensemble of atoms whose transition frequencies have bee…
Experimental test of the third quantization of the electromagnetic field
J. D. Franson
Each mode of the electromagnetic field is mathematically equivalent to a harmonic oscillator described by a wave function in the quadrature represent…
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…
Generating entangled Schrodinger cat states using a number state and a beam splitter
S. U. Shringarpure, J. D. Franson
Passing a photon number state through a balanced beam splitter will produce an entangled state in which the phases of the two output beams are highly correlated. This entangled sta…
Generating photon-added states without adding a photon
S. U. Shringarpure, J. D. Franson
We show that a continuous range of nonclassical states of light can be generated using conditional measurements on the idler mode of an optical parametric amplifier. The output sta…
Compensation of polarization dependent loss using noiseless amplification and attenuation
R. A. Brewster, B. T. Kirby, J. D. Franson +1
Polarization dependent loss (PDL) is a serious problem that hinders the transfer of polarization qubits through quantum networks. Recently it has been shown that the detrimental ef…
Optical attenuation without absorption
I. C. Nodurft, R. A. Brewster, T. B. Pittman +1
We consider a coherent state of light propagating through an ensemble of two-level atoms where all the atoms are initially in their ground state. In ordinary absorption, the transi…
Limitations on the use of the Heisenberg picture in quantum optics
J. D. Franson, R. A. Brewster
The Schrodinger and Heisenberg pictures are equivalent formulations of quantum mechanics. Here we use the Schrodinger picture to calculate the decoherence that occurs when an optic…
Reduced decoherence using squeezing, amplification, and anti-squeezing
R. A. Brewster, T. B. Pittman, J. D. Franson
Loss and decoherence are a major problem in the transmission of non-classical states of light over large distances. It was recently shown that the effects of decoherence can be red…
Noiseless attenuation using an optical parametric amplifier
R. A. Brewster, I. C. Nodurft, T. B. Pittman +1
The process of heralded noiseless amplification, and the inverse process of heralded noiseless attenuation, have potential applications in the context of quantum communications. Al…
Velocity-dependent optical forces and Maxwell's demon
J. D. Franson
An atom placed in a focused laser beam will experience a dipole force due to the gradient in the interaction energy, which is analogous to the well-known optical tweezers effect. T…
Effects of entanglement in an ideal optical amplifier
J. D. Franson, R. A. Brewster
In an ideal linear amplifier, the output signal is linearly related to the input signal with an additive noise that is independent of the input. The decoherence of a quantum-mechan…
Generalized Delta Functions and Their Use in Quantum Optics
R. A. Brewster, J. D. Franson
The Dirac delta function is widely used in many areas of physics and mathematics. Here we consider the generalization of a Dirac delta function to allow the use of complex argument…
Low-Power Cross-Phase Modulation in a Metastable Xenon-Filled Cavity for Quantum Information Applications
G. T. Hickman, T. B. Pittman, J. D. Franson
Weak single-photon nonlinearities have many potential applications in quantum computing and quantum information. Here we demonstrate a relatively simple system for producing low-po…
Ladder-type electromagnetically induced transparency using nanofiber-guided light in a warm atomic vapor
D. E. Jones, J. D. Franson, T. B. Pittman
We demonstrate ladder-type electromagnetically induced transparency (EIT) using an optical nanofiber suspended in a warm rubidium vapor. The signal and control fields are both guid…
Origin of Quantum Noise and Decoherence in Distributed Amplifiers
J. D. Franson, B. T. Kirby
The use of distributed amplifiers may have some potential advantages for the transmission of quantum information through optical fibers. In addition to the quantum noise introduced…
Saturated absorption at nanowatt power levels using metastable xenon in a high-finesse optical cavity
G. T. Hickman, T. B. Pittman, J. D. Franson
Strong saturated absorption at nanowatt power levels has been demonstrated using metastable xenon in a high-finesse optical cavity. The use of metastable xenon allows a high qualit…
Feasibility of single-photon cross-phase modulation using metastable xenon in a high finesse cavity
B. T. Kirby, G. T. Hickman, T. B. Pittman +1
Cross-phase modulation at the single-photon level has a wide variety of fundamental applications in quantum optics including the generation of macroscopic entangled states. Here we…
Macroscopic State Interferometry Over Large Distances Using State Discrimination
B. T. Kirby, J. D. Franson
The propagation of macroscopic entangled states over large distances in the presence of loss is of fundamental interest and may have practical applications as well. Here we describ…