Conditional production of superpositions of coherent states with inefficient photon detection
By A. Lund, H. Jeong, Timothy C. Ralph, Myungshik S. Kim. 2003
176 citations recorded by the source corpus.
It is shown that a linear superposition of two macroscopically distinguishable optical coherent states can be generated using a single photon source and simple all-optical operations. Weak squeezing on a single photon, beam mixing with an auxiliary coherent state, and photon detecting with imperfect threshold detectors are enough to generate a coherent state superposition in a free propagating optical field with a large coherent amplitude (alpha>2) and high fidelity (F>0.99). In contrast to all previous schemes to generate such a state, our scheme does not need photon number resolving measurements nor Kerr-type nonlinear interactions. Furthermore, it is robust to detection inefficiency and exhibits some resilience to photon production inefficiency.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/56c0c3d73427d7664c52537f171fa2ebd0f5f5f1
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In Artificial Intelligence
- Jonathan P. Dowling
- Kae Nemoto
- William J. Munro
- Timothy C. Ralph
- Stefano Pirandola
- Morgan W. Mitchell
- Pieter Kok
- Gerardo Adesso
In Atomic and Molecular Physics, and Optics
- Jonathan P. Dowling
- Timothy C. Ralph
- Stefano Pirandola
- Morgan W. Mitchell
- Pieter Kok
- Gerardo Adesso
- William J. Munro
- Kae Nemoto
Citations in the corpus
- Linear optical quantum computing with photonic qubits (2005, background): “The downside is that it is difficult to produce the superposition states that are required as resources in such schemes, although considerable theoretical and experimental progress has been made recently (Lund et al. 2004; Wenger et al. 2004).”
- Quantum-enhanced measurements without entanglement (2017, methodology): “In (Lund et al., 2004) a “breeding method” based on weak squeezing, beam mixing with an auxiliary coherent field, and photon detecting with threshold detectors was proposed to achieve values up to α ≤ 2.5, but the success probability has been found to be too low for a realistic iterated protocol.”