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- Austin P. Lund, Timothy C. Ralph, Henry L. Haselgrove
- Physical review letters
- 2008

Quantum computing using two coherent states as a qubit basis is a proposed alternative architecture with lower overheads but has been questioned as a practical way of performing quantum computing dueâ€¦ (More)

- Austin P. Lund, Anthony Laing, Saleh Rahimi-Keshari, Terry G Rudolph, Jeremy Lloyd O'Brien, Timothy. C. Ralph
- Physical review letters
- 2014

We pose a randomized boson-sampling problem. Strong evidence exists that such a problem becomes intractable on a classical computer as a function of the number of bosons. We describe a quantumâ€¦ (More)

The idea of signal amplification is ubiquitous in the control of physical systems, and the ultimate performance limit of amplifiers is set by quantum physics. Increasing the amplitude of an unknownâ€¦ (More)

- Kurt Jacobs, Austin P. Lund
- Physical review letters
- 2007

We show that in the regime in which feedback control is most effective - when measurements are relatively efficient, and feedback is relatively strong - then, in the absence of any sharpâ€¦ (More)

The standard method for encoding qubits in optics is use the polarization degrees of freedom of single photo This is sometimes referred to a dual-rail logic because either does or does not use theâ€¦ (More)

- Saleh Rahimi-Keshari, Austin P. Lund, Timothy C. Ralph
- Physical review letters
- 2015

Considering the problem of sampling from the output photon-counting probability distribution of a linear-optical network for input Gaussian states, we obtain results that are of interest from bothâ€¦ (More)

- Saleh Rahimi-Keshari, Austin P. Lund, Timothy C. Ralph
- ArXiv
- 2014

Considering the problem of sampling from the output photon-counting probability distribution of a linearoptical network for input Gaussian states, we obtain new results that are of interest from bothâ€¦ (More)

- Farid Shahandeh, Austin P. Lund, Timothy C. Ralph
- Physical review letters
- 2017

Determination of the quantum nature of correlations between two spatially separated systems plays a crucial role in quantum information science. Of particular interest is the questions of if and howâ€¦ (More)

Entangled coherent states are useful for various applications in quantum information processing, but they are sensitive to loss. We propose a scheme to generate distributed entangled coherent statesâ€¦ (More)

Photon counting induces an effective nonlinear optical phase shift on certain states derived by linear optics from single photons. Although this nonlinearity is nondeterministic, it is sufficient inâ€¦ (More)