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20 papers · 2 filters
Environmental non-additivity and Franck-Condon physics in non-equilibrium quantum systems
Henry Maguire, Jake Iles-Smith, Ahsan Nazir
We show that for a quantum system coupled to both vibrational and electromagnetic environments, enforcing additivity of their combined influences results in non-equilibrium dynamic…
Ancilla-assisted schemes are beneficial for Gaussian state phase estimation
Zixin Huang, Chiara Macchiavello, Lorenzo Maccone +1
We study interferometry with Gaussian states and show that an ancilla-assisted scheme outperforms coherent state interferometry for all levels of loss. We also compare the ancilla-…
Tunable photon statistics exploiting the Fano effect in a waveguide
A. P. Foster, D. Hallett, I. V. Iorsh +9
A strong optical nonlinearity arises when coherent light is scattered by a semiconductor quantumdot (QD) coupled to a nano-photonic waveguide. We exploit the Fano effect in such a…
A random compiler for fast Hamiltonian simulation
Earl Campbell
The dynamics of a quantum system can be simulated using a quantum computer by breaking down the unitary into a quantum circuit of one and two qubit gates. The most established meth…
Optimal imaging of remote bodies using quantum detectors
L. A. Howard, G. G. Gillett, M. E. Pearce +4
We implement a general imaging method by measuring the complex degree of coherence using linear optics and photon number resolving detectors. In the absence of collective or entang…
Radio-frequency reflectometry of a quantum dot using an ultra-low-noise SQUID amplifier
F. J. Schupp, F. Vigneau, Y. Wen +12
Fault-tolerant spin-based quantum computers will require fast and accurate qubit readout. This can be achieved using radio-frequency reflectometry given sufficient sensitivity to t…