Optical Eratosthenes' sieve for large prime numbers
Optics Express Optical Society of America 28:8 (2020) 11965-11973
Abstract:
We report the first experimental demonstration of a prime number sieve via linear optics. The prime numbers distribution is encoded in the intensity zeros of the far field produced by a spatial light modulator hologram, which comprises a set of diffraction gratings whose periods correspond to all prime numbers below 149. To overcome the limited far field illumination window and the discretization error introduced by the spatial light modulator finite spatial resolution, we rely on additional diffraction gratings and sequential recordings of the far field. This strategy allows us to optically sieve all prime numbers below 1492 = 22201.Engineering Schrodinger cat states with a photonic even parity detector
Quantum Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften 4:239 (2020)
Abstract:
When two equal photon-number states are combined on a balanced beam splitter, both output ports of the beam splitter contain only even numbers of photons. Consider the time-reversal of this interference phenomenon: the probability that a pair of photon-number-resolving detectors at the output ports of a beam splitter both detect the same number of photons depends on the overlap between the input state of the beam splitter and a state containing only even photon numbers. Here, we propose using this even-parity detection to engineer quantum states containing only even photon-number terms. As an example, we demonstrate the ability to prepare superpositions of two coherent states with opposite amplitudes, i.e. two-component Schrödinger cat states. Our scheme can prepare cat states of arbitrary size with nearly perfect fidelity. Moreover, we investigate engineering more complex even-parity states such as four-component cat states by iteratively applying our even-parity detector.Reinforcement Learning Enhanced Quantum-inspired Algorithm for Combinatorial Optimization
(2020)
Experimental Self-Characterization of Quantum Measurements
Physical Review Letters American Physical Society (APS) 124:4 (2020) 040402
Darkness of two-mode squeezed light in ?-type atomic system
New Journal of Physics IOP Publishing 22:1 (2020) 13014