75 citations · 449 across the 18 of their papers we have counts for
19 papers
Complexity of spin configurations dynamics due to unitary evolution and periodic projective measurements
Heitor P. Casagrande, Bo Xing, Marcello Dalmonte +3
We study the Hamiltonian dynamics of a many-body quantum system subjected to periodic projective measurements which leads to probabilistic cellular automata dynamics. Given a seque…
Relaxation exponents of OTOCs and overlap with local Hamiltonians
Vinitha Balachandran, Dario Poletti
OTOC has been used to characterize the information scrambling in quantum systems. Recent studies showed that local conserved quantities play a crucial role in governing the relaxat…
Slow relaxation of out-of-time-ordered correlators in interacting integrable and nonintegrable spin-1/2 XYZ chains
Vinitha Balachandran, Lea F. Santos, Marcos Rigol +1
Out-of-time ordered correlators (OTOCs) help characterize the scrambling of quantum information and are usually studied in the context of nonintegrable systems. In this work, we co…
Ground state search by local and sequential updates of neural network quantum states
Wenxuan Zhang, Xiansong Xu, Zheyu Wu +2
Neural network quantum states are a promising tool to analyze complex quantum systems given their representative power. It can however be difficult to optimize efficiently and effe…
Transport and spectral properties of the XXXXZ diode and stability to dephasing
Kang Hao Lee, Vinitha Balachandran, Chu Guo +1
We study the transport and spectral property of a segmented diode formed by an XX XXZ spin chain. This system has been shown to become an ideal rectifier for spin current for l…
Thermopower in a boundary driven bosonic ladder in the presence of a gauge field
Bo Xing, Xiansong Xu, Vinitha Balachandran +1
We consider a bosonic two-legged ladder whose two-band energy spectrum can be tuned in the presence of a uniform gauge field, to four distinct scenarios: degenerate or non-degenera…
From ETH to algebraic relaxation of OTOCs in systems with conserved quantities
Vinitha Balachandran, Giuliano Benenti, Giulio Casati +1
The relaxation of out-of-time-ordered correlators (OTOCs) has been studied as a mean to characterize the scrambling properties of a quantum system. We show that the presence of loc…
Giant rectification in segmented, strongly interacting, spin chains despite the presence of perturbations
Kang Hao Lee, Vinitha Balachandran, Dario Poletti
In Phys. Rev. Lett. 120, 200603 (2018), a segmented XXZ spin chain with zero anisotropy in one half and a large anisotropy on the other half gave rise to a spin current rectificati…
Heat, particle and chiral currents in a boundary driven bosonic ladders in presence of gauge fields
Bo Xing, Xiansong Xu, Vinitha Balachandran +1
Quantum systems can undergo phase transitions and show distinct features in different phases. The corresponding transport properties can also vary significantly due to the underlyi…
Steady state quantum transport through an anharmonic oscillator strongly coupled to two heat reservoirs
Tianqi Chen, Vinitha Balachandran, Chu Guo +1
We investigate the transport properties of an anharmonic oscillator, modeled by a single-site Bose-Hubbard model, coupled to two different thermal baths using the numerically exact…
Giant spin current rectification due to the interplay of negative differential conductance and a non-uniform magnetic field
Kang Hao Lee, Vinitha Balachandran, Ryan Tan +2
In XXZ chains, spin transport can be significantly suppressed when the interactions in the chain and the bias of the dissipative driving are large enough. This phenomenon of negati…
Transport and energetic properties of a ring of interacting spins coupled to heat baths
Xiansong Xu, Kenny Choo, Vinitha Balachandran +1
We study the heat and spin transport properties in a ring of interacting spins coupled to heat baths at different temperatures. We show that interactions, by inducing avoided cross…
Heat current rectification and mobility edges
Vinitha Balachandran, Stephen R. Clark, John Goold +1
We investigate how the presence of a single-particle mobility edge in a system can generate strong heat current rectification. Specifically, we study a quadratic bosonic chain subj…
Heat current rectification in segmented XXZ chains
Vinitha Balachandran, Giuliano Benenti, Emmanuel Pereira +2
We study the rectification of heat current in an XXZ chain segmented in two parts. We model the effect of the environment with Lindblad heat baths. We show that, in our system, rec…
Perfect diode in quantum spin chains
Vinitha Balachandran, Giuliano Benenti, Emmanuel Pereira +2
We study the rectification of spin current in chains segmented in two parts, each with a different anisotropy parameter. Using exact diagonalization and a matrix product stat…
Efficiency of three-terminal thermoelectric transport under broken-time reversal symmetry
Vinitha Balachandran, Giuliano Benenti, Giulio Casati
We investigate thermoelectric efficiency of systems with broken time reversal symmetry under a three-terminal transport. Using a model of Aharonov-Bohm interferometer formed with t…
Validity of the Wiedemann-Franz law in small molecular wires
Vinitha Balachandran, Riccardo Bosisio, Giuliano Benenti
We report our investigations on the finite-size effects of the Lorenz number in a molecular wire. Using Landauer-Büttiker formalism, we find that for sufficiently long wires there…
Phase-space characterization of complexity in quantum many-body dynamics
Vinitha Balachandran, Giuliano Benenti, Giulio Casati +1
We propose a phase-space Wigner harmonics entropy measure for many-body quantum dynamical complexity. This measure, which reduces to the well known measure of complexity in classic…
Adiabatic Quantum Transport in a Spin Chain with a Moving Potential
Vinitha Balachandran, Jiangbin Gong
Many schemes to realize quantum state transfer in spin chains are not robust to random fluctuations in the spin-spin coupling strength. In efforts to achieve robust quantum state t…