QCIP

Hello! I’m a bot monitoring physics.quant-ph on the arXiv for papers on quantum computation and information. Whenever I find a new one, I’ll create a thread with its abstract and link to it. Enjoy!

Update (June 10, 2023): due to the changes to Twitter's API, this bot is no longer functioning. I'll try to get it back at some point but the chances of that happening are not great.

compared to several alternatives in finding the ground states of some prototypical quantum many-body systems as well as quantum chemistry systems, in terms of the number of quantum gate operations. [5/5]

while in 2D our ansatz generates the string-bond states. As applications, we demonstrate that our ansatz can be used to accurately reconstruct unknown pure and mixed quantum states which can be represented as matrix product states, and that our ansatz is more efficient [4/5]

arxiv.org/abs/2305.12856… "A sequentially generated variational quantum circuit with polynomial complexity" by Xiaokai Hou, Qingyu Li, Man-Hong Yung, Xusheng Xu, Zizhu Wang et al. [1/5]

Summary: We propose and implement a software-defined network architecture that integrates the QKD SDN Controller within the QKD node, enabling it to use quantum keys to secure its communication with SDN agents while optimizing QKD-keys consumption.

arxiv.org/abs/2305.12893… "Software-defined quantum network using a QKD-secured SDN controller and encrypted messages" by R. S. Tessinari, R. I. Woodward, A. J. Shields.

setup, we construct such a protocol and show that it is unconditionally secure. In this protocol, the committer transfers no quantum states to the receiver. [3/3]

Summary: We note that the proof of the no-go theorem of unconditionally secure quantum bit commitment is based on a model which is not universal. For protocols not described by the model, this theorem does not apply. Using unstable particles and a modified double-slit [2/3]

arxiv.org/abs/2305.12902… "Unconditionally secure quantum bit commitment using modified double-slit and unstable particles" by Chi-Yee Cheung. [1/3]

still be co-diagonal with it; or not even be co-diagonal with it. That is, just because filtering and retrofiltering appear classical does not mean classical smoothing theory is applicable in quantum experiments. [8/8]

turned into a classical measurement record, but then its nature depends on the choice of measurement. We show by a simple model that, depending on that measurement choice, the smoothed quantum state can: agree with that from the classical method; disagree with it but [7/8]

arxiv.org/abs/2305.12970… "Quantum state smoothing cannot be assumed classical even when the filtering and retrofiltering are classical" by Kiarn T. Laverick, Prahlad Warszawski, Areeya Chantasri, Howard M. Wiseman. [1/8]

obtained for the implemented CVQKD. [5/5]

is robust against polarization drift. We also present the simulation results with a noise model to account for the channel noise and the effects of various parameter changes on the secure key rate. These simulation results help us to verify the experimental values [4/5]

arxiv.org/abs/2305.13126… "Free Space Continuous Variable Quantum Key Distribution with Discrete Phases" by Anju Rani, Pooja Chandravanshi, Jayanth Ramakrishnan, Pravin Vaity, P. Madhusudhan et al. [1/5]