Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Yi, Changhao"'
Classical shadow estimation (CSE) is a powerful tool for learning properties of quantum states and quantum processes. Here we consider the CSE task for quantum unitary channels. By querying an unknown unitary channel $\mathcal{U}$ multiple times in q
Externí odkaz:
http://arxiv.org/abs/2410.14538
When the local dimension $d$ is an odd prime, the qudit Clifford group is only a 2-design, but not a 3-design, unlike the qubit counterpart. This distinction and its extension to Clifford orbits have profound implications for many applications in qua
Externí odkaz:
http://arxiv.org/abs/2410.13575
Shadow estimation is a sample-efficient protocol for learning the properties of a quantum system through randomized measurements, but the current understanding on qudit shadow estimation is quite limited compared with the qubit setting. Here we clari
Externí odkaz:
http://arxiv.org/abs/2410.13572
We present a randomized dynamical decoupling (DD) protocol that can improve the performance of any given deterministic DD, by using no more than two additional pulses. Our construction is implemented by probabilistically applying sequences of pulses,
Externí odkaz:
http://arxiv.org/abs/2409.18369
Autor:
Zhou, Kai, Yi, Changhao, Yan, Wen-Zhe, Hou, Zhibo, Zhu, Huangjun, Xiang, Guo-Yong, Li, Chuan-Feng, Guo, Guang-Can
Nonclassical phenomena tied to entangled states are focuses of foundational studies and powerful resources in many applications. By contrast, the counterparts on quantum measurements are still poorly understood. Notably, genuine multipartite nonclass
Externí odkaz:
http://arxiv.org/abs/2312.01651
As a signal recovery algorithm, compressed sensing is particularly useful when the data has low-complexity and samples are rare, which matches perfectly with the task of quantum phase estimation (QPE). In this work we present a new Heisenberg-limited
Externí odkaz:
http://arxiv.org/abs/2306.07008
Autor:
Yi, Changhao
Publikováno v:
Phys. Rev. A 104, 052603 (2021)
The simulation of adiabatic evolution has deep connections with Adiabatic Quantum Computation, the Quantum Approximate Optimization Algorithm and adiabatic state preparation. Here we address the error analysis problem in quantum simulation of adiabat
Externí odkaz:
http://arxiv.org/abs/2107.06404
Autor:
Yi, Changhao, Crosson, Elizabeth
We consider Hamiltonian simulation using the first order Lie-Trotter product formula under the assumption that the initial state has a high overlap with an energy eigenstate, or a collection of eigenstates in a narrow energy band. This assumption is
Externí odkaz:
http://arxiv.org/abs/2102.12655
Publikováno v:
Phys. Lett. B, 800, 135088 (2020)
The flavor transformation in a dense neutrino gas can have a significant impact on the physical and chemical evolution of its surroundings. In this work we demonstrate that a dynamic, fast flavor oscillation wave can develop spontaneously in a one-di
Externí odkaz:
http://arxiv.org/abs/1909.05225
Publikováno v:
Phys. Rev. D 99, 063005 (2019)
A dense neutrino medium can support flavor oscillation waves which are coherent among different momentum modes of the neutrinos. The dispersion relation (DR) branches of such a wave with complex frequencies and/or wave numbers can lead to the exponen
Externí odkaz:
http://arxiv.org/abs/1901.01546