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8 papers · 2 filters
Quantum Repeater using Two-Mode Squeezed States and Atomic Noiseless Amplifiers
Anders J. E. Bjerrum, Jonatan B. Brask, Jonas S. Neergaard-Nielsen +1
We perform a theoretical investigation into how a two-mode squeezed vacuum state, that has undergone photon loss, can be stored and purified using noiseless amplification with a co…
Machine learning based joint polarization and phase compensation for CV-QKD
Hou-Man Chin, Adnan E. Hajomer, Nitin Jain +2
We investigated a machine learning method for joint estimation of polarization and phase for use in a Gaussian modulated CV-QKD system, over an 18 hour period measured on a install…
Sensing of magnetic field effects in radical-pair reactions using a quantum sensor
Deepak Khurana, Rasmus H. Jensen, Rakshyakar Giri +4
Magnetic field effects (MFE) in certain chemical reactions have been well established in the last five decades and are attributed to the evolution of transient radical-pairs whose…
Mechanical cooling and squeezing using optimal control
Frederik Werner Isaksen, Ulrik Lund Andersen
A mechanical system can be optimally controlled through continuous measurements of its position followed by feedback. We revisit the complete formalism for predicting the performan…
Continuous-Variable Quantum Key Distribution Over 60 km Optical Fiber With Real Local Oscillator
Adnan A. E. Hajomer, Hossein Mani, Nitin Jain +3
We report the first continuous-variable quantum key distribution experiment that enables the generation of secure key over a 60 km fiber channel with locally generated local oscill…
Quantum Rabi interferometry of motion and radiation
Kimin Park, Petr Marek, Ulrik L. Andersen +1
The precise determination of a displacement of a mechanical oscillator or a microwave field in a predetermined direction in phase space can be carried out with trapped ions or supe…
Digital synchronization for continuous-variable quantum key distribution
Hou-Man Chin, Nitin Jain, Ulrik L. Andersen +1
Continuous variable quantum key distribution (CV-QKD) is a promising emerging technology for the distribution of secure keys for symmetric encryption. It can be readily implemented…
40 km Fiber Transmission of Squeezed Light Measured with a Real Local Oscillator
Iyad Suleiman, Jens Arnbak Holbøll Nielsen, Xueshi Guo +4
We demonstrate the generation, 40 km fiber transmission, and homodyne detection of single-mode squeezed states of light at 1550 nm using real-time phase control of a locally genera…