Generation and frequency conversion of quantum states in high "Q" SRF parametric oscillators
Abstract
The overall objective of the proposed research is to take advantage of extremely high quality factor (Q) superconducting radio frequency (SRF) cavities to produce wavelength independent frequency modulation, thereby enabling the conversion of squeezed states from microwave (11 GHz) to optical frequencies (300 THz). A specific objective of the first phase of the proposed research is to achieve squeezing of microwave photon states via radiation pressure force and conduct an estimation of squeezing threshold and transfer fidelity. The specific objective of the Phase II option (an additional 18 months) is on observing the translation of squeezed microwave fields to optical frequencies through Doppler shifting or cavity enhanced Doppler shifting. The overall proposed approach is to experimentally study squeezing in a new type of opto-mechanical parametric oscillator. The proposed experiments employ an effective nonlinearity arising from the quadratic response in the displacement of a membrane to the magnetic field present at the membraneÕs surface. Early experiments will focus on squeezing associated with the parametric generation of correlated pairs of real photons from electromagnetic quantum vacuum fluctuations. The proposed experiments are based on mechanical resonators that couple to a wide range of devices, ranging from optical nanocavities to microwave resonators, and serve as a powerful interface between systems operating in the optical regime and those operating in the microwave frequency regime. Such an interface could be used to transfer classical and quantum information via a network of distinct elements. In recent experiments, researchers have demonstrated coherent state conversion of microwave fields to optical photons via an optomechanical interface. Here, the proposed experiments on the transfer of squeezed states will facilitate the characterization and optimization of such an interface to achieve high fidelity transfer of information. Two thrusts will be pursued in Phase I of the proposed research: 1) investigation of a high-Q superconducting radio-frequency parametric oscillator operating just below threshold to generate squeezed states at microwave frequencies of 11 GHz; and 2) theoretically explore the use of parametric frequency conversion to convert from microwave to optical frequencies. If the first phase is successful, the second phase of the proposed research will explore Doppler shifting of squeezed microwave fields to optical frequencies.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 12, 2017
- Source ID
- W911NF1510557
Entities
People
- Jay E. Sharping
Organizations
- Army Contracting Command
- Defense Advanced Research Projects Agency
- University of California