88 citations · 448 across the 39 of their papers we have counts for
40 papers
Quantum Codes for Generalized Amplitude-damping Noise
Sourav Dutta, Anubhab Rudra, Manav Seksaria +2
Quantum error correcting (QEC) plays a crucial role in protecting quantum information against decoherence and enabling scalable, reliable quantum computing. One of the most realist…
Demonstrating Noise-adapted Quantum Error Correction With Break-Even Performance
Vismay Joshi, Anubhab Rudra, Sourav Dutta +2
The promise of quantum computing is closer to reality today than ever before, thanks to rapid progress in the development of quantum hardware. Even as qubit lifetimes and gate fide…
Universal syndrome-based recovery for noise-adapted quantum error correction
Debjyoti Biswas, Prabha Mandayam
Quantum error correction (QEC) is an essential tool for quantum computing that enables reliable information processing in the presence of noise. Syndrome measurements play a centra…
Fault tolerance against amplitude-damping noise using Bacon-Shor codes
Long D. H. My, Akshaya Jayashankar, Prabha Mandayam +1
Designing efficient fault tolerance schemes is crucial for building useful quantum computers. Most standard schemes assume no knowledge of the underlying device noise and rely on g…
Expedited Noise Spectroscopy of Transmon Qubits
Bhavesh Gupta, Vismay Joshi, Udit Kandpal +3
There has been tremendous progress in the physical realization of quantum computing hardware in recent times, bringing us closer than ever before to realizing the promise of quantu…
Noise-adapted Quantum Error Correction for Non-Markovian Noise
Debjyoti Biswas, Shrikant Utagi, Prabha Mandayam
We consider the problem of quantum error correction (QEC) for non-Markovian noise. Using the well known Petz recovery map, we first show that conditions for approximate QEC can be…
Smallest quantum codes for amplitude damping noise
Sourav Dutta, Aditya Jain, Prabha Mandayam
We describe the smallest quantum error correcting (QEC) code to correct for amplitude-damping (AD) noise, namely, a 3-qubit code that corrects all the single-qubit damping errors.…
Mitigating imperfections in Differential Phase Shift Measurement-Device-Independent Quantum Key Distribution via Plug-and-Play architecture
Nilesh Sharma, Shashank Kumar Ranu, Prabha Mandayam +1
Measurement-device-independent quantum key distribution (MDI-QKD) was originally proposed as a means to address the issue of detector side-channel attacks and enable finite secure…
Noise-adapted qudit codes for amplitude-damping noise
Sourav Dutta, Debjyoti Biswas, Prabha Mandayam
Quantum error correction (QEC) plays a critical role in preventing information loss in quantum systems and provides a framework for reliable quantum computation. Identifying quantu…
Explicit attacks on differential phase shift quantum key distribution
Valliamai Ramanathan, Anil Prabhakar, Prabha Mandayam
In the well-established framework of quantum key distribution (QKD), differential phase shift (DPS) protocols have known information-theoretic security bounds defining tolerable er…
Noise-adapted recovery circuits for quantum error correction
Debjyoti Biswas, Gaurav M. Vaidya, Prabha Mandayam
Implementing quantum error correction (QEC) protocols is a challenging task in today's era of noisy intermediate-scale quantum devices. We present quantum circuits for a universal,…
Quantum non-Markovianity: Overview and recent developments
U. Shrikant, Prabha Mandayam
In the current era of noisy intermediate-scale quantum (NISQ) devices, research in the theory of open system dynamics has a crucial role to play. In particular, understanding and q…
Pretty good measurement for bosonic Gaussian ensembles
Hemant K. Mishra, Ludovico Lami, Prabha Mandayam +1
The pretty good measurement is a fundamental analytical tool in quantum information theory, giving a method for inferring the classical label that identifies a quantum state chosen…
QKD in the NISQ era: enhancing secure key rates via quantum error correction
Shashank Kumar Ranu, Anil Prabhakar, Prabha Mandayam
Error mitigation is one of the key challenges in realising the full potential of quantum cryptographic protocols. Consequently, there is a lot of interest in adapting techniques fr…
Quantum Error Correction: Noise-adapted Techniques and Applications
Akshaya Jayashankar, Prabha Mandayam
The quantum computing devices of today have tens to hundreds of qubits that are highly susceptible to noise due to unwanted interactions with their environment. The theory of quant…
Holographic spacetime, black holes and quantum error correcting codes: A review
Tanay Kibe, Prabha Mandayam, Ayan Mukhopadhyay
This article reviews the progress in our understanding of the reconstruction of the bulk spacetime in the holographic correspondence from the dual field theory including an account…
Unital Qubit Queue-channels: Classical Capacity and Product Decoding
Vikesh Siddhu, Avhishek Chatterjee, Krishna Jagannathan +2
Quantum queue-channels arise naturally in the context of buffering in quantum networks, wherein the noise suffered by the quantum states depends on the time spent waiting in the bu…
Queue-Channel Capacities with Generalized Amplitude Damping
Vikesh Siddhu, Avhishek Chatterjee, Krishna Jagannathan +2
The generalized amplitude damping channel (GADC) is considered an important model for quantum communications, especially over optical networks. We make two salient contributions in…
Achieving fault tolerance against amplitude-damping noise
Akshaya Jayashankar, My Duy Hoang Long, Hui Khoon Ng +1
With the intense interest in small, noisy quantum computing devices comes the push for larger, more accurate -- and hence more useful -- quantum computers. While fully fault-tolera…
Characterizing incompatibility of quantum measurements via their Naimark extensions
Arindam Mitra, Sibasish Ghosh, Prabha Mandayam
We obtain a formal characterization of the compatibility or otherwise of a set of positive-operator-valued measures (POVMs) via their Naimark extensions. We show that a set of POVM…
Equivalence of space and time-bins in DPS-QKD
Gautam Shaw, Shyam Sridharan, Shashank Ranu +3
Key generation efficiency, and security, in DPS-QKD improve with an increase in the number of path delays or time-bin superpositions. We demonstrate the implementation of super-pos…
Finding good quantum codes using the Cartan form
Akshaya Jayashankar, Anjala M Babu, Hui Khoon Ng +1
We present a simple and fast numerical procedure to search for good quantum codes for storing logical qubits in the presence of independent per-qubit noise. In a key departure from…
Entanglement measures of bipartite quantum gates and their thermalization under arbitrary interaction strength
Bhargavi Jonnadula, Prabha Mandayam, Karol Życzkowski +1
Entanglement properties of bipartite unitary operators are studied via their local invariants, namely the entangling power and a complementary quantity, the gate typicality $…
On optimal cloning and incompatibility
Arindam Mitra, Prabha Mandayam
We investigate the role of symmetric quantum cloning machines (QCMs) in quantifying the mutual incompatibility of quantum observables. Specifically, we identify a cloning-based inc…