82 citations · 649 across the 24 of their papers we have counts for
25 papers
Cost of quantum secret key
Karol Horodecki, Leonard Sikorski, Siddhartha Das +1
In this paper, we develop the resource theory of quantum secret key. Operating under the assumption that entangled states with zero distillable key do not exist, we define the key…
Practical limitations on robustness and scalability of quantum Internet
Abhishek Sadhu, Meghana Ayyala Somayajula, Karol Horodecki +1
As quantum theory allows for information processing and computing tasks that otherwise are not possible with classical systems, there is a need and use of quantum Internet beyond e…
Testing of quantum nonlocal correlations under constrained free will and imperfect detectors
Abhishek Sadhu, Siddhartha Das
In this work, we deal with the relaxation of two central assumptions in standard locally realistic hidden variable (LRHV) inequalities: free will in choosing measurement settings,…
Speed limits on correlations in bipartite quantum systems
Vivek Pandey, Divyansh Shrimali, Brij Mohan +2
Quantum speed limit is bound on the minimum time a quantum system requires to evolve from an initial state to final state under a given dynamical process. It sheds light on how fas…
Fundamental limitations on the device-independent quantum conference key agreement
Karol Horodecki, Marek Winczewski, Siddhartha Das
We provide several general upper bounds on the rate of a key secure against a quantum adversary in the device-independent conference key agreement (DI-CKA) scenario. They include b…
Quantum speed limits for information and coherence
Brij Mohan, Siddhartha Das, Arun Kumar Pati
The quantum speed limit indicates the maximal evolution speed of the quantum system. In this work, we determine speed limits on the informational measures, namely the von Neumann e…
Extendibility limits the performance of quantum processors
Eneet Kaur, Siddhartha Das, Mark M. Wilde +1
Resource theories in quantum information science are helpful for the study and quantification of the performance of information-processing tasks that involve quantum systems. These…
Upper bounds on device-independent quantum key distribution rates in static and dynamic scenarios
Eneet Kaur, Karol Horodecki, Siddhartha Das
In this work, we develop upper bounds for key rates for device-independent quantum key distribution (DI-QKD) protocols and devices. We study the reduced cc-squashed entanglement an…
Partial order on passive states and Hoffman majorization in quantum thermodynamics
Uttam Singh, Siddhartha Das, Nicolas J. Cerf
Passive states, i.e., those states from which no work can be extracted via unitary operations, play an important role in the foundations and applications of quantum thermodynamics.…
Universal Limitations on Quantum Key Distribution over a Network
Siddhartha Das, Stefan Bäuml, Marek Winczewski +1
We consider the distribution of secret keys, both in a bipartite and a multipartite (conference) setting, via a quantum network and establish a framework to obtain bounds on the ac…
Resource theory of entanglement for bipartite quantum channels
Stefan Bäuml, Siddhartha Das, Xin Wang +1
The traditional perspective in quantum resource theories concerns how to use free operations to convert one resourceful quantum state to another one. For example, a fundamental and…
Quantum rebound capacity
Siddhartha Das, Mark M. Wilde
Inspired by the power of abstraction in information theory, we consider quantum rebound protocols as a way of providing a unifying perspective to deal with several information-proc…
Bipartite Quantum Interactions: Entangling and Information Processing Abilities
Siddhartha Das
The aim of this thesis is to advance the theory behind quantum information processing tasks, by deriving fundamental limits on bipartite quantum interactions and dynamics, which co…
Fundamental limits on the capacities of bipartite quantum interactions
Stefan Bäuml, Siddhartha Das, Mark M. Wilde
Bipartite quantum interactions have applications in a number of different areas of quantum physics, reaching from fundamental areas such as quantum thermodynamics and the theory of…
Resource theory of unextendibility and non-asymptotic quantum capacity
Eneet Kaur, Siddhartha Das, Mark M. Wilde +1
In this paper, we introduce the resource theory of unextendibility as a relaxation of the resource theory of entanglement. The free states in this resource theory are the k-extendi…
Practically secure quantum position verification
Siddhartha Das, George Siopsis
We discuss quantum position verification (QPV) protocols in which the verifiers create and send single-qubit states to the prover. QPV protocols using single-qubit states are known…
Robust quantum network architectures and topologies for entanglement distribution
Siddhartha Das, Sumeet Khatri, Jonathan P. Dowling
Entanglement distribution is a prerequisite for several important quantum information processing and computing tasks, such as quantum teleportation, quantum key distribution, and d…
Fundamental limits on quantum dynamics based on entropy change
Siddhartha Das, Sumeet Khatri, George Siopsis +1
It is well known in the realm of quantum mechanics and information theory that the entropy is non-decreasing for the class of unital physical processes. However, in general, the en…
Continuous-variable quantum Gaussian process regression and quantum singular value decomposition of non-sparse low rank matrices
Siddhartha Das, George Siopsis, Christian Weedbrook
With the significant advancement in quantum computation in the past couple of decades, the exploration of machine-learning subroutines using quantum strategies has become increasin…
Quantum reading capacity: General definition and bounds
Siddhartha Das, Mark M. Wilde
Quantum reading refers to the task of reading out classical information stored in a read-only memory device. In any such protocol, the transmitter and receiver are in the same phys…
Approximate reversal of quantum Gaussian dynamics
Ludovico Lami, Siddhartha Das, Mark M. Wilde
Recently, there has been focus on determining the conditions under which the data processing inequality for quantum relative entropy is satisfied with approximate equality. The sol…
Hadamard quantum broadcast channels
Qingle Wang, Siddhartha Das, Mark M. Wilde
We consider three different communication tasks for quantum broadcast channels, and we determine the capacity region of a Hadamard broadcast channel for these various tasks. We def…
Approximate reversibility in the context of entropy gain, information gain, and complete positivity
Francesco Buscemi, Siddhartha Das, Mark M. Wilde
There are several inequalities in physics which limit how well we can process physical systems to achieve some intended goal, including the second law of thermodynamics, entropy bo…
Multipartite Bell-type Inequality by Generalizing Wigner's Argument
Dipankar Home, Debashis Saha, Siddhartha Das
Wigner's argument inferring Bell-type inequality for the EPR-Bohm entangled state is generalized here for any N-partite state. This is based on assuming for the relevant dichotomic…