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November 2020
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  1. CSI Q Seminar

    "Quantum-Assisted Telescope Arrays"

    Presented by Emil Khabiboulline, Harvard University

    Monday, January 13, 2020, 3 pm
    Training Room, CSI Bldg 725

    Hosted by: Andrei Nomerotski

    Quantum networks provide a platform for astronomical interferometers capable of imaging faint stellar objects. We present a protocol with efficient use of quantum resources and modest quantum memories. In our approach, the quantum state of incoming photons along with an arrival time index is stored in a binary qubit code at each receiver. Nonlocal retrieval of the quantum state via entanglement-assisted parity checks at the expected photon arrival rate allows for direct extraction of phase difference, effectively circumventing transmission losses between nodes. Compared to prior proposals, our scheme (based on efficient quantum data compression) offers an exponential decrease in required entanglement bandwidth. We show that it can be operated as a broadband interferometer and generalized to multiple sites in the array. We also analyze how imaging based on the quantum Fourier transform provides improved signal-to-noise ratio compared to classical processing. Finally, we discuss physical realizations including photon detection-based quantum state transfer. Experimental implementation is then feasible with near-term technology, enabling optical imaging of astronomical objects akin to well-established radio interferometers and pushing resolution beyond what is practically achievable classically. References: Phys. Rev. Lett. 123, 070504, Phys. Rev. A 100, 022316

Currently showing seminars from the past year. See all past seminars »

There are no conferences scheduled at this time.

  1. Belle II Summer School 2019

    July 29 - August 2, 2019

  2. CARE 2015: Career Advancement in a Research Environment

    March 10, 2015

  3. 7th International Meeting on Front-End Electronics

    May 18-21, 2009