Zobrazeno 1 - 10
of 348
pro vyhledávání: '"McDonald, Alexander"'
Autor:
Dumas, Marie Frédérique, Groleau-Paré, Benjamin, McDonald, Alexander, Muñoz-Arias, Manuel H., Lledó, Cristóbal, D'Anjou, Benjamin, Blais, Alexandre
Despite the high measurement fidelity that can now be reached, the dispersive qubit readout of circuit quantum electrodynamics is plagued by a loss of its quantum nondemolition character and a decrease in fidelity with increased measurement strength.
Externí odkaz:
http://arxiv.org/abs/2402.06615
Autor:
Lacroix, Nathan, Hofele, Luca, Remm, Ants, Benhayoune-Khadraoui, Othmane, McDonald, Alexander, Shillito, Ross, Lazar, Stefania, Hellings, Christoph, Swiadek, Francois, Colao-Zanuz, Dante, Flasby, Alexander, Panah, Mohsen Bahrami, Kerschbaum, Michael, Norris, Graham J., Blais, Alexandre, Wallraff, Andreas, Krinner, Sebastian
Quantum computers will require quantum error correction to reach the low error rates necessary for solving problems that surpass the capabilities of conventional computers. One of the dominant errors limiting the performance of quantum error correcti
Externí odkaz:
http://arxiv.org/abs/2309.07060
We develop a method to derive the exact formula of entanglement entropy for generic inhomogeneous conformal field theory (CFT) quantum quenches with open boundary condition (OBC), which characterizes the generic boundary effect unresolved by analytic
Externí odkaz:
http://arxiv.org/abs/2309.04540
Publikováno v:
PRX Quantum 5, 010313 (2024)
Despite its fully unitary dynamics, the bosonic Kitaev chain (BKC) displays key hallmarks of non-Hermitian physics including non-reciprocal transport and the non-Hermitian skin effect. Here we demonstrate another remarkable phenomena: the existence o
Externí odkaz:
http://arxiv.org/abs/2308.14614
Autor:
McDonald, Alexander, Clerk, Aashish A.
Publikováno v:
Phys. Rev. Research 5, 033107 (2023)
The connections between standard theoretical tools used to study open quantum systems can sometimes seem opaque. Whether it is a Lindblad master equation, the equation of motion for the Wigner function or a dissipative Keldysh action, features eviden
Externí odkaz:
http://arxiv.org/abs/2302.14047
Publikováno v:
Phys. Rev. B 108, 064311 (2023)
We show for generic quantum non-Hermitian tight-binding models that relaxation timescales of local observables are not controlled by the localization length $\xi_{\rm loc}$ associated with the non-Hermitian skin effect, contrary to popular belief. In
Externí odkaz:
http://arxiv.org/abs/2210.14212
Autor:
McDonald, Alexander, Clerk, Aashish A.
Publikováno v:
Phys. Rev. Lett. 128, 033602 (2022)
We demonstrate how the presence of continuous weak symmetry can be used to analytically diagonalize the Liouvillian of a class Markovian dissipative systems with arbitrary strong interactions or nonlinearity. This enables an exact description of the
Externí odkaz:
http://arxiv.org/abs/2109.13221
Autor:
Wang, Ying-Ying, van Geldern, Sean, Connolly, Thomas, Wang, Yu-Xin, Shilcusky, Alexander, McDonald, Alexander, Clerk, Aashish A., Wang, Chen
Ferrite microwave circulators allow one to control the directional flow of microwave signals and noise, and thus play a crucial role in present-day superconducting quantum technology. They are typically viewed as a black-box, and their internal struc
Externí odkaz:
http://arxiv.org/abs/2106.11283
Publikováno v:
Phys. Rev. Research 3, 043228 (2021)
We develop a new approach to understanding intrinsic mechanisms that cause the $T_1$-decay rate of a multi-level superconducting qubit to depend on the photonic population of a coupled, detuned cavity. Our method yields simple analytic expressions fo
Externí odkaz:
http://arxiv.org/abs/2106.05179
Publikováno v:
Phys. Rev. B 105, 064302 (2022)
We show how generic non-Hermitian tight-binding lattice models can be realized in an unconditional, quantum-mechanically consistent manner by constructing an appropriate open quantum system. We focus on the quantum steady states of such models for bo
Externí odkaz:
http://arxiv.org/abs/2103.01941