Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Timothy H. Hsieh"'
Publikováno v:
Physical Review X, Vol 14, Iss 3, p 031044 (2024)
Open system quantum dynamics can generate a variety of long-range entangled mixed states, yet it has been unclear in what sense they constitute phases of matter. To establish that two mixed states are in the same phase, as defined by their two-way co
Externí odkaz:
https://doaj.org/article/1c67485f19dd4066859c10593127d43b
Publikováno v:
PRX Quantum, Vol 4, Iss 4, p 040332 (2023)
Projective measurement, a basic operation in quantum mechanics, can induce seemingly nonlocal effects. In this work, we analyze such effects in many-body systems by studying the nonequilibrium dynamics of weakly monitored quantum circuits, focusing o
Externí odkaz:
https://doaj.org/article/b13406ef3fc64985addca86d8095a8f1
Publikováno v:
PRX Quantum, Vol 4, Iss 3, p 030318 (2023)
We propose a general framework for using local measurements, local unitaries, and nonlocal classical communication to construct quantum channels, which can efficiently prepare mixed states with long-range quantum order or quantum criticality. As an i
Externí odkaz:
https://doaj.org/article/13b6c12e166c4f1b8e175c2e78f4402e
Publikováno v:
Quantum, Vol 7, p 910 (2023)
The sign structure of quantum states is closely connected to quantum phases of matter, yet detecting such fine-grained properties of amplitudes is subtle. Here we employ as a diagnostic measurement-induced entanglement (MIE): the average entanglement
Externí odkaz:
https://doaj.org/article/96db0ac1ce434b659cb6956d1e95077c
Publikováno v:
PRX Quantum, Vol 3, Iss 4, p 040337 (2022)
The preparation of long-range entangled states using unitary circuits is limited by Lieb-Robinson bounds, but circuits with projective measurements and feedback (“adaptive circuits”) can evade such restrictions. We introduce three classes of loca
Externí odkaz:
https://doaj.org/article/29e4482bf3004ee386ef4f0d247fc0f4
Publikováno v:
Quantum, Vol 5, p 612 (2021)
We introduce the concepts of a symmetry-protected sign problem and symmetry-protected magic to study the complexity of symmetry-protected topological (SPT) phases of matter. In particular, we say a state has a symmetry-protected sign problem or symme
Externí odkaz:
https://doaj.org/article/7e0deeed90f34905895d188661326a6c
Publikováno v:
PRX Quantum, Vol 2, Iss 3, p 030313 (2021)
We propose entanglement negativity as a fine-grained probe of measurement-induced criticality. We motivate this proposal in stabilizer states, where for two disjoint subregions, comparing their “mutual negativity” and their mutual information lea
Externí odkaz:
https://doaj.org/article/1bcf0b06217e4f0293e1cebb6e4b7f4a
Autor:
Shengqi Sang, Timothy H. Hsieh
Publikováno v:
Physical Review Research, Vol 3, Iss 2, p 023200 (2021)
We introduce a class of hybrid quantum circuits, with random unitaries and projective measurements, which host long-range order in the area-law entanglement phase of the steady state. Our primary example is circuits with unitaries respecting a global
Externí odkaz:
https://doaj.org/article/db71ade01f054298a8b32d3d218472a6
Publikováno v:
Physical Review X, Vol 5, Iss 4, p 041038 (2015)
We introduce an exactly solvable model of interacting Majorana fermions realizing Z_{2} topological order with a Z_{2} fermion parity grading and lattice symmetries permuting the three fundamental anyon types. We propose a concrete physical realizati
Externí odkaz:
https://doaj.org/article/aad4aac2287a4922a17df4e1397e72f3
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2015.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 83-91).
As the title implies, this thesis consists of two main topics:
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 83-91).
As the title implies, this thesis consists of two main topics:
Externí odkaz:
http://hdl.handle.net/1721.1/103228