33 citations · 188 across the 26 of their papers we have counts for
26 papers
Polytopic Quantum Resource Theories: Geometry and Structures
Moein Naseri, Chirag Srivastava, Chandan Datta +2
Quantum resource theories provide a unifying framework to quantify, compare, and manipulate quantum resources under well-defined operational constraints. Here, we consider any reso…
Remote predictability of quantum measurement outcomes
Chirag Srivastava, Aparajita Bhattacharyya, Sheikh Parvez Mandal +2
Predicting quantum measurement outcomes for a local observer makes sense before, but not after, the measurement. However, for a remote observer, predicting measurement outcomes eve…
Quantum waste management: Utilizing residual states in quantum information processing
Karol Horodecki, Chirag Srivastava, Leonard Sikorski +1
Quantum resource theories use distillation protocols to convert less resourceful states into fully resourceful ones. However, these protocols often also generate an additional, unu…
Unbounded entanglement-sustaining sequential local quantum state discrimination
Debarupa Saha, Priya Ghosh, Kornikar Sen +2
Two pure orthogonal quantum states can be perfectly distinguished by sequential local action of multiple pairs of parties. However, this process typically leads to the complete dis…
Minimal-error quantum state discrimination versus robustness of entanglement:More indistinguishability with less entanglement
Debarupa Saha, Kornikar Sen, Chirag Srivastava +1
We relate the the distinguishability of quantum states with their robustness of the entanglement, where the robustness of any resource quantifies how tolerant it is to noise. In pa…
Measurement incompatibility at all remote parties do not always permit Bell nonlocality
Priya Ghosh, Chirag Srivastava, Swati Choudhary +1
Two important ingredients necessary for obtaining Bell nonlocal correlations between two spatially separated parties are an entangled state shared between them and an incompatible…
Local entanglement transfer to multiple pairs of spatially separated observers
Tanmoy Mondal, Kornikar Sen, Chirag Srivastava +1
Entanglement is an advantageous but at the same time a costly resource utilized in various quantum tasks. For an efficient usage and deployment of entanglement, we envisage the sce…
Exclusion principle for nonlocal advantage of quantum coherence
Priya Ghosh, Mahasweta Pandit, Chirag Srivastava +1
Coherences in mutually unbiased bases of states of an isolated quantum system follow a complementarity relation. The nonlocal advantage of quantum coherence (NAQC), defined in a bi…
Sequential detection of genuine multipartite entanglement is unbounded for entire hierarchy of number of qubits recycled
Chirag Srivastava, Mahasweta Pandit, Ujjwal Sen
Experimental detection of entanglement certainly disturbs the underlying shared state. It is possible that the entanglement content of the system is lost in the process of its dete…
Recycled detection of genuine multiparty entanglement of unlimitedly stretched array of parties and arbitrarily long series of sequential observers
Chirag Srivastava, Mahasweta Pandit, Ujjwal Sen
We consider a scenario where spatially separated observers share a genuinely multiparty entangled quantum state with each local observer possessing a single qubit. A particular qub…
Closing loopholes of measurement-device-independent nonlinear entanglement witnesses
Kornikar Sen, Chirag Srivastava, Ujjwal Sen
The concept of entanglement witnesses form a useful technique to detect entanglement in realistic quantum devices. Measurement-device-independent nonlinear entanglement witnesses (…
Recycled entanglement detection by arbitrarily many sequential and independent pairs of observers
Mahasweta Pandit, Chirag Srivastava, Ujjwal Sen
We investigate the witnessing of two-qubit entangled states by sequential and independent pairs of observers, with both observers of each pair acting independently on their part of…
Invariance of success probability in Grover's quantum search under local noise with memory
Sheikh Parvez Mandal, Ahana Ghoshal, Chirag Srivastava +1
We analyze the robustness of Grover's quantum search algorithm performed by a quantum register under a possibly time-correlated noise acting locally on the qubits. We model the noi…
Entanglement witnessing by arbitrarily many independent observers recycling a local quantum shared state
Chirag Srivastava, Mahasweta Pandit, Ujjwal Sen
We investigate the scenario where an observer, Alice, shares a two-qubit state with an arbitrary number of observers, Bobs, via sequentially and independently recycling the qubit i…
Quantum coherence with incomplete set of pointers and corresponding wave-particle duality
Ingita Banerjee, Kornikar Sen, Chirag Srivastava +1
Quantum coherence quantifies the amount of superposition in a quantum system, and is the reason and resource behind several phenomena and technologies. It depends on the natural ba…
Measurement-device-independent nonlinear entanglement witnesses
Kornikar Sen, Chirag Srivastava, Ujjwal Sen
Entanglement witnesses are one of the most effective methods to detect entanglement. It is known that nonlinear entanglement witnesses provide better entanglement detection than th…
Quantum information can remain without physical body in volatile form
Brij Mohan, Sohail, Chirag Srivastava +2
A deeply rooted view in classical and quantum information is that "information is physical", i.e., to store and process information, we need a physical body. Here we ask whether qu…
Noisy quantum input loophole in measurement-device-independent entanglement witnesses
Kornikar Sen, Chirag Srivastava, Shiladitya Mal +2
Entanglement witnesses form an effective method to locally detect entanglement in the laboratory without having the prior knowledge of the full density matrix. However, separable s…
Scaling of non-adiabaticity in disordered quench of quantum Rabi model close to phase transition
Chirag Srivastava, Ujjwal Sen
Dynamics of a system exhibits non-adiabaticity even for slow quenches near critical points. We analyze the response to disorder in quenches on a non-adiabaticity quantifier for the…
Equilibrium and dynamical phase transitions in fully connected quantum Ising model: Approximate energy eigenstates and critical time
Arun Sehrawat, Chirag Srivastava, Ujjwal Sen
We study equilibrium as well as dynamical properties of the finite-size fully connected Ising model with a transverse field at the zero temperature. In relation to the equilibrium,…
Resource theory of quantum coherence with probabilistically non-distinguishable pointers and corresponding wave-particle duality
Chirag Srivastava, Sreetama Das, Ujjwal Sen
One of the fundamental features of quantum mechanics is the superposition principle, a manifestation of which is embodied in quantum coherence. Coherence of a quantum state is inva…
Detection loophole in measurement-device-independent entanglement witness
Kornikar Sen, Chirag Srivastava, Shiladitya Mal +2
There always exists an entanglement witness for every entangled quantum state. Negativity of the expectation value of an entanglement witness operator guarantees entanglement of th…
Sequential measurement-device-independent entanglement detection by multiple observers
Chirag Srivastava, Shiladitya Mal, Aditi Sen De +1
Violation of a Bell inequality certifies that the underlying state must be entangled in a device-independent way, although there may exist some entangled states which do not violat…
Locally distinguishing quantum states with limited classical communication
Saronath Halder, Chirag Srivastava
We consider different settings of the task to distinguish pure orthogonal quantum states under local operations and a limited amount of classical communication. In the first settin…