David Vitali

Microwave Quantum Radar using a Josephson Traveling Wave Parametric Amplifier

  1. Patrizia Livreri,
  2. Emanuele Enrico,
  3. Luca Fasolo,
  4. Angelo Greco,
  5. Alessio Rettaroli,
  6. David Vitali,
  7. Alfonso Farina,
  8. Francesco Marchetti,
  9. and Dario Giacomin
Detection of low-reflectivity objects can be improved by the so-called quantum illumination procedure. However, quantum detection probability exponentially decays with the source bandwidth.
The Josephson Parametric Amplifiers (JPAs) technology utilized as a source, generating a pair of entangled signals called two-mode squeezed vacuum states, shows a very narrow bandwidth limiting the operation of the microwave quantum radar (MQR). In this paper, for the first time, a microwave quantum radar setup based on quantum illumination protocol and using a Josephson Traveling Wave Parametric Amplifier (JTWPA) is proposed. Measurement results of the developed JTWPA, pumped at 12 GHz, show an ultrawide bandwidth equal to 10 GHz at X-band making our MQR a promising candidate for the detection of stealth objects.
arxiv pdf

Josephson Travelling Wave Parametric Amplifiers as Non-Classical Light Source for Microwave Quantum Illumination

  1. Luca Fasolo,
  2. Angelo Greco,
  3. Emanuele Enrico,
  4. Fabrizio Illuminati,
  5. Rosario Lo Franco,
  6. David Vitali,
  7. and Patrizia Livreri
Detection of low-reflectivity objects can be enriched via the so-called quantum illumination procedure. In order that this quantum procedure outperforms classical detection protocols,
entangled states of microwave radiation are initially required. In this paper, we discuss the role of Josephson Traveling Wave Parametric Amplifiers (JTWPAs), based on circuit-QED components, as suitable sources of a two-mode squeezed vacuum state, a special signal-idler entangled state. The obtained wide bandwidth makes the JTWPA an ideal candidate for generating quantum radiation in quantum metrology and information processing applications.
arxiv pdf