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Ballistic Entanglement Cloud after a Boundary Quench
Bedoor Alkurtass, Abolfazl Bayat, Pasquale Sodano +2
Entanglement has been extensively used to characterize the structure of strongly correlated many-body systems. Most of these analyses focus on either spatial properties of entangle…
A quantum phase transition detected through one dimensional ballistic conductance
Abolfazl Bayat, Sanjeev Kumar, Michael Pepper +1
A quantum phase transition is an unequivocal signature of strongly correlated many-body physics. Signatures of such phenomena are yet to be observed in ballistic transport through…
Entanglement entropy scaling in solid-state spin arrays via capacitance measurements
Leonardo Banchi, Abolfazl Bayat, Sougato Bose
Solid-state spin arrays are being engineered in varied systems, including gated coupled quantum dots and interacting dopants in semiconductor structures. Beyond quantum computation…
Entanglement structure of the two-channel Kondo model
Bedoor Alkurtass, Abolfazl Bayat, Ian Affleck +5
Two electronic channels competing to screen a single impurity spin, as in the two-channel Kondo model, are expected to generate a ground state with nontrivial entanglement structur…
Self assembled Wigner crystals as mediators of spin currents and quantum information
Bobby Antonio, Abolfazl Bayat, Sanjeev Kumar +2
Technological applications of many-body structures that emerge in gated devices under minimal control are largely unexplored. Here we show how emergent Wigner crystals in a semicon…
Universal Single-Frequency Oscillations in a Quantum Impurity System After a Local Quench
Abolfazl Bayat, Sougato Bose, Henrik Johannesson +1
Long-lived single-frequency oscillations in the local non-equilibrium dynamics of a quantum many-body system is an exceptional phenomenon. In fact, till now, it has never been obse…
An order parameter for impurity systems at quantum criticality
Abolfazl Bayat, Henrik Johannesson, Sougato Bose +1
A quantum phase transition may occur in the ground state of a system at zero temperature when a controlling field or interaction is varied. The resulting quantum fluctuations which…
Entanglement probe of two-impurity Kondo physics in a spin chain
Abolfazl Bayat, Sougato Bose, Pasquale Sodano +1
We propose that real-space properties of the two-impurity Kondo model can be obtained from an effective spin model where two single-impurity Kondo spin chains are joined via an RKK…
Negativity as the Entanglement Measure to Probe the Kondo Regime in the Spin-Chain Kondo Model
Abolfazl Bayat, Pasquale Sodano, Sougato Bose
We study the entanglement of an impurity at one end of a spin chain with a block of spins using negativity as a true measure of entanglement to characterize the unique features of…
Kondo Cloud Mediated Long Range Entanglement After Local Quench in a Spin Chain
Pasquale Sodano, Abolfazl Bayat, Sougato Bose
We show that, in the gapless Kondo Regime, a single local quench at one end of a Kondo spin chain induces a fast and long lived oscillatory dynamics. This quickly establishes a hig…