65 citations · 124 across the 10 of their papers we have counts for
10 papers
Canonical forms of two-qubit states under local operations
Sudha, H. S. Karthik, Rajarshi Pal +4
Canonical forms of two-qubits under the action of stochastic local operations and classical communications (SLOCC) offer great insight for understanding non-locality and entangleme…
Path Integral for Spin-1 Chain in the Fluctuating Matrix Product State Basis
Jintae Kim, Rajarshi Pal, Jin-Hong Park +1
A new method of writing down the path integral for spin-1 Heisenberg antiferromagnetic chain is introduced. In place of the conventional coherent state basis that leads to the non-…
Probing the randomness of ergodic states: extreme-value statistics in the ergodic and many-body-localized phases
Rajarshi Pal, Arul Lakshminarayan
The extreme-value statistics of the entanglement spectrum in disordered spin chains possessing a many-body localization transition is examined. It is expected that eigenstates in t…
Low-energy dynamics of the Affleck-Kennedy-Lieb-Tasaki model in the one- and two-triplon basis
Jintae Kim, Rajarshi Pal, Jung Hoon Han
The elementary excitation in the antiferromagnetic spin-1 model known as the Affleck-Kennedy-Lieb-Tasaki (AKLT) Hamiltonian has been described alternatively as magnons or kink-like…
Entangling power of time-evolution operators in integrable and nonintegrable many-body systems
Rajarshi Pal, Arul Lakshminarayan
The entangling power and operator entanglement entropy are state independent measures of entanglement. Their growth and saturation is examined in the time-evolution operator of qua…
Entanglement sharing via qudit channels: Nonmaximally entangled states may be necessary for one-shot optimal singlet fraction and negativity
Rajarshi Pal, Somshubhro Bandyopadhyay
We consider the problem of establishing entangled states of optimal singlet fraction and negativity between two remote parties for every use of a noisy quantum channel and trace-pr…
A closed-form necessary and sufficient condition for any two-qubit state to show hidden nonlocality w.r.t the Bell-CHSH inequality
Rajarshi Pal, Sibasish Ghosh
In this note, we discuss a closed-form necessary and sufficient condition for any two-qubit state to show hidden nonlocality w.r.t the Bell-CHSH inequality. This is then used to nu…
Entanglement sharing through noisy qubit channels: One-shot optimal singlet fraction
Rajarshi Pal, Somshubhro Bandyopadhyay, Sibasish Ghosh
Maximally entangled states--a resource for quantum information processing--can only be shared through noiseless quantum channels, whereas in practice channels are noisy. Here we as…
Non-locality breaking qubit channels
Rajarshi Pal, Sibasish Ghosh
Entanglement breaking channels play a significant role in quantum information theory. In this work we investigate qubit channels through their property of `non-locality breaking',…
Approximate joint measurement of qubit observables through an Arthur-Kelly type model
Rajarshi Pal, Sibasish Ghosh
We consider joint measurement of two and three unsharp qubit observables through an Arthur-Kelly type joint measurement model for qubits. We investigate the effect of initial state…