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40 papers · 2 filters
Measuring the Casimir-Polder potential with Unruh-DeWitt detector excitations
Kacper Dębski, Piotr T. Grochowski, Andrzej Dragan
We propose a new method to measure Casimir-Polder force in an optical cavity by means of atomic excitations. We utilize a framework in which Unruh-DeWitt Hamiltonian mimics the ful…
symmetric evolution, coherence and violation of Leggett-Garg inequalities
Javid Naikoo, Swati Kumari, A. K. Pan +1
We report an unusual buildup of the quantum coherence in a qubit subjected to non-Hermitian evolution generated by a Parity-Time () symmetric Hamiltonian, which is re…
Attaining classical capacity per unit cost of noisy bosonic Gaussian channels
Marcin Jarzyna
I show that classical capacity per unit cost of noisy bosonic Gaussian channels can be attained by employing generalized on-off keying modulation format and a projective measuremen…
Quantum Fingerprinting over AWGN Channels with Power-Limited Optical Signals
Michał Lipka, Marcin Jarzyna, Konrad Banaszek
Quantum fingerprinting reduces communication complexity of determination whether two -bit long inputs are equal or different in the simultaneous message passing model. Here we q…
Mutually unbiased bases and symmetric informationally complete measurements in Bell experiments
Armin Tavakoli, Máté Farkas, Denis Rosset +2
Mutually unbiased bases (MUBs) and symmetric informationally complete projectors (SICs) are crucial to many conceptual and practical aspects of quantum theory. Here, we develop the…
Photon Efficiency Limits in the Presence of Background Noise
Konrad Banaszek, Wojciech Zwoliński, Ludwig Kunz +1
We identify theoretical limits on the photon information efficiency (PIE) of a deep-space optical communication link constrained by the average signal power and operated in the pre…