Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Roy, Sudipto Singha"'
The non-Hermitian paradigm of quantum systems displays salient features drastically different from Hermitian counterparts. In this work, we focus on one such aspect, the difference of evolving quantum ensembles under $H_{\mathrm{nh}}$ (right ensemble
Externí odkaz:
http://arxiv.org/abs/2406.13517
The Eigenstate Thermalization Hypothesis (ETH) has been highly influential in explaining thermodynamic behavior of closed quantum systems. As of yet, it is unclear whether and how the ETH applies to non-Hermitian systems. Here, we introduce a framewo
Externí odkaz:
http://arxiv.org/abs/2309.00049
Publikováno v:
Physical Review B 106, 195158 (2022)
Frustration and quantum entanglement are two exotic quantum properties in quantum many-body systems. However, despite several efforts, an exact relation between them remains elusive. In this work, we explore the relationship between frustration and q
Externí odkaz:
http://arxiv.org/abs/2209.08815
Autor:
Santalla, Silvia N., Ramírez, Giovanni, Roy, Sudipto Singha, Sierra, Germán, Rodríguez-Laguna, Javier
Publikováno v:
Physical Review B 107, L121114 (2023)
The time evolution of a quantum state with short-range correlations after a quench to a one-dimensional critical Hamiltonian can be understood using the quasi-particle picture, which states that local entanglement spreads as if it was carried by quas
Externí odkaz:
http://arxiv.org/abs/2208.03766
Autor:
Roy, Sudipto Singha, Ramírez, Giovanni, Santalla, Silvia N., Sierra, Germán, Rodríguez-Laguna, Javier
Publikováno v:
Physical Review B 105, 214306 (2022)
We describe a relation between the light-cone velocities after a quantum quench and the internal structure of the initial state, in the particular case of free fermions on a chain at half filling. The considered states include short-range valence bon
Externí odkaz:
http://arxiv.org/abs/2112.13382
Publikováno v:
Physical Review A 105, 032432 (2022)
We consider a topological Hamiltonian and establish a correspondence between its eigenstates and the resource for a causal order game introduced in Ref. [1] known as process matrix. We show that quantum correlations generated in the quantum many-body
Externí odkaz:
http://arxiv.org/abs/2105.09795
Publikováno v:
Quantum Theory and Symmetries, Proceedings of the 11th International Symposium, Montreal, Canada, Springer International Publishing, Page 347-357 (2021)
We attempt to reveal the geometry, emerged from the entanglement structure of any general $N$-party pure quantum many-body state by representing entanglement entropies corresponding to all $2^N $ bipartitions of the state by means of a generalized ad
Externí odkaz:
http://arxiv.org/abs/2104.03645
Publikováno v:
J. Phys. A: Math. Theor. 54 305301 (2021)
We have recently shown that the entanglement entropy of any bipartition of a quantum state can be approximated as the sum of certain link strengths connecting internal and external sites. The representation is useful to unveil the geometry associated
Externí odkaz:
http://arxiv.org/abs/2103.08929
Publikováno v:
J. Stat. Mech. 053102 (2021)
The Haldane phase is the prototype of symmetry protected topological (SPT) phases of spin chain systems. It can be protected by several symmetries having in common the degeneracy of the entanglement spectrum. Here we explore in depth this degeneracy
Externí odkaz:
http://arxiv.org/abs/2011.05452
Autor:
Bera, Anindita, Roy, Sudipto Singha
Publikováno v:
Phys. Rev. A 102, 062431 (2020)
We study the growth of genuine multipartite entanglement in random quantum circuit models, which include random unitary circuit models and the random Clifford circuit. We find that for the random Clifford circuit, the growth of multipartite entanglem
Externí odkaz:
http://arxiv.org/abs/2003.12546