Quantum limits of parameter estimation in long-baseline imaging by Aqil Sajjad, Michael R. Grace, Saikat Guha

Get full text

Multi-pulse Fourier codes for bit transmission at the quantum limit by Matteo Rosati

Get full text

Quantum-limited stochastic optical neural networks operating at a few quanta per activation by Shi-Yuan Ma, Tianyu Wang, Jérémie Laydevant, Logan G. Wright, Peter L. McMahon

“…Abstract Energy efficiency in computation is ultimately limited by noise, with quantum limits setting the fundamental noise floor. Analog physical neural networks hold promise for improved energy efficiency compared to digital electronic neural networks. …”
Get full text

Entanglement-Enhanced Atomic Gravimeter by Christophe Cassens, Bernd Meyer-Hoppe, Ernst Rasel, Carsten Klempt

“…Here, we present a gravimeter based on Bose-Einstein condensates with a sensitivity of -1.7_{-0.5}^{+0.4}  dB beyond the standard quantum limit. Interferometry with Bose-Einstein condensates combined with delta-kick collimation minimizes atom loss in and improves scalability of the interferometer to very-long-baseline atom interferometers.…”
Get full text

Unlocking Heisenberg Sensitivity with Sequential Weak Measurement Preparation by T. B. Lantaño, Dayou Yang, K. M. R. Audenaert, S. F. Huelga, M. B. Plenio

“…The metrological sensitivity of the resulting state surpasses the standard quantum limit, reaching the Heisenberg limit under symmetric coupling strength conditions. …”
Get full text

Channel capacity analysis of non-line-of-sight ultraviolet communication in noncoplanar geometry based on traversing tiny unit method by Peng SONG, Caixia SU, Taifei ZHAO, Jinni CHEN, Lei ZHU, Xiaodan ZHANG

“…Channel capacity reflects the ability of the system to transmit information without errors.The path loss and impulse response of the system were calculated based on traversing tiny unit method,and then the frequency response of the system was obtained by the discrete Fourier transform of the impulse response sampling sequence,and the 3 dB bandwidth of the system was calculated.Considering the shot noise caused by signal light,the signal-to-noise ratio of the system was obtained according to the quantum limit method,and then the relationship between the channel capacity and the geometric parameters of transmitter and receiver in non-line-of-sight noncoplanar ultraviolet communication system were simulated and analyzed by Shannon formula.The results show that the channel capacity decreases with the increase of the off axis angle and the communication distance.When the elevation angles of transmitter and receiver are less than 40°,the channel capacity decreases rapidly with the increase of the elevation angles of transmitter and receiver,and the transmitter elevation angle has a great influence on the channel capacity.The system channel capacity is almost constant with the increase of divergence angle,and the larger the receiver field of view angle,the greater the system channel capacity.…”
Get full text

Inherent stochasticity, noise and limits of detection in continuous and time-gated fluorescence systems. by Nicholas H Vitale, Arjang Hassibi, Hyongsok Tom Soh, Boris Murmann, Thomas H Lee

“…For a given system, the quantum-limited signal-to-noise ratio (QSNR) and limits of detection are computed to demonstrate how key design tradeoffs are quantified. …”
Get full text