Quantum-circuit design for efficient simulations of many-body quantum dynamics University of Calgary | Publication | 2012-01-01 | S. Raeisi, N. Wiebe, B. C. Sanders |

Coarse Graining Makes It Hard to See Micro-Macro Entanglement University of Calgary | Publication | 2011-12-01 | S. Raeisi, P. Sekatski, C. Simon |

Proposal for inverting the quantum cloning of photons University of Calgary, The University of Calgary | Publication | 2012-01-01 | S. Raeisi, W. Tittel, C. Simon |

Micro-macro entanglement and coarse-grained measurementsWe are studying the demonstration of entanglement in a micro-macro system. The entanglement is
produced via parametric down conversion process between two photons and is being amplified through
a phase-co-variant cloner to entanglement between a photon and a beam of light. We introduce an
analogous system which exploits an entanglement breaking amplifier and produces only classical
correlation between the two parties. We show that it is hard to distinguish the outcomes of the two
systems, considering even a small inaccuracy in photon counting measurements. We model these
inaccuracies as coarse-graining. The result is that for certain types of measurements, small coarse-
graining makes the classical and quantum mechanical correlation indistinguishable. University of Calgary | Presentation | 2011-05-12 | S. Raeisi, C. Simon, C. Simon |

Micro-Macro Entanglement and Coarse-grained MeasurementsWe are studying the demonstration of entanglement in a micro-macro system. The entanglement is
produced via parametric down conversion process between two photons and is being amplified through
a phase-co-variant cloner to entanglement between a photon and a beam of light. We introduce an
analogous system which exploits an entanglement breaking amplifier and produces only classical
correlation between the two parties. We show that it is hard to distinguish the outcomes of the two
systems, considering even a small inaccuracy in photon counting measurements. We model these
inaccuracies as coarse-graining. The result is that for certain types of measurements, small coarse-
graining makes the classical and quantum mechanical correlation indistinguishable. University of Calgary | Presentation | 2011-06-16 | S. Raeisi, C. Simon, C. Simon |

Why is it hard to see Schrödinger's cat?We are studying the demonstration of entanglement in a micro-macro system. The entanglement is produced via parametric down conversion process between two photons and is being amplified through a phase-covariant cloner to entanglement between a photon and a beam of light. We introduce an analogous system which exploits an entanglement breaking amplifier and produces only classical correlation between the two parties. We show that it is hard to distinguish the outcomes of the two systems considering even a small inaccuracy in photon counting measurements. We model these inaccuracies as coarse-graining. The result is that for certain types of measurements small coarse-graining makes the classical and quantum mechanical correlation indistinguishable. University of Calgary | Presentation | 2011-06-24 | S. Raeisi, C. Simon, C. Simon |

Matrix Product States and Quantum Phase TransitionThe study of strongly correlated systems attracts much attention from condensed matter physicists since quantum fluctuations introduce different phases with interesting physical properties. Several numerical and analytical approaches have been developed to investigate properties of low lying states. However, there is no specific framework in place to deal with the challenging problem of Quantum Phase Transition (QPT). We propose a method to detect some of QPTs based on a matrix product representation of the ground state of strongly correlated systems with local Hamiltonians. As a confirmation of our proposed method, we show that our analytical results compare favorably with numerical studies of XXZ spin-one chain with uniaxial single-ion-type anisotropy. University of Calgary | Presentation | 2010-02-24 | K. Heshami, S. Raeisi |

Precision requirements for observing macroscopic quantum effects University of Calgary | Publication | 2013-12-01 | T. Wang, R. Ghobadi, S. Raeisi, C. Simon |