Research areas
Research areas
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Some of the research areas that we are currently exploring are:
Quantum Cryptography
Quantum Cryptography
Randomness expansion secure against quantum adversaries
Randomness is a crucial resource in cryptography, simulations, and secure communications. However, generating truly unpredictable numbers can be challenging, especially when facing adversaries with access to quantum technology.
Secure randomness expansion protocols leverage the intrinsic unpredictability of quantum mechanics to generate random numbers from a small initial random seed. By performing carefully designed experiments, we can ensure that the generated randomness is both unpredictable and verifiable, even in the presence of a powerful quantum adversary.
This approach plays a vital role in strengthening the security of cryptographic systems, ensuring trustworthy randomness for several applications.
Quantum key distribution
Quantum Key Distribution is a technique that uses the principles of quantum mechanics to enable secure communication. Unlike traditional encryption methods, QKD ensures that two parties can share a secret key in such a way that any attempt to intercept or eavesdrop on the transmission will inevitably leave detectable traces.
This security is guaranteed by the fundamental properties of quantum systems, such as the no-cloning theorem, the uncertainty principle, Bell non-locality or quantum contextuality. By carefully measuring and analyzing quantum states, QKD allows for the generation of encryption keys that are provably secure against even the most powerful adversaries — including those with quantum computers.
With its potential to safeguard sensitive information against future threats, QKD represents a crucial step toward building a secure quantum communication network.
Device independent Quantum information theory
Device independent Quantum information theory
Device-independent quantum information is a revolutionary approach to quantum communication and computation, where security and correctness are guaranteed without needing to trust the internal workings of the devices used. Instead, the security relies solely on the observed statistics of measurement outcomes and the fundamental principles of quantum mechanics.
By using phenomena like Bell non-locality, device-independent protocols can detect and mitigate potential device flaws or malicious interference. This makes them ideal for applications like quantum key distribution (DIQKD) and secure randomness generation, ensuring robust protection even against sophisticated quantum adversaries.
Device-independent methods push the boundaries of what’s possible in quantum information science, offering a new level of trust in our quantum technologies.
Bell non-locality and quantum contextuality
Bell non-locality and quantum contextuality
Bell nonlocality and quantum contextuality are two fascinating phenomena that challenge our classical understanding of the world.
Bell nonlocality refers to the striking correlations observed between distant quantum systemss in entangled quantum states. These correlations cannot be explained by any local hidden variable theory, as demonstrated by Bell’s theorem. Instead, they reveal the inherently nonlocal nature of quantum mechanics, making them a powerful resource for tasks like secure communication and device-independent quantum cryptography.
Quantum contextuality, on the other hand, highlights how the outcome of a quantum measurement can depend on the choice of other, seemingly unrelated, measurements. Unlike classical systems, the properties of a quantum system are not fixed independently of the measurement context. This contextual nature is a key feature of quantum theory, underpinning advantages in quantum computing and information processing.
Together, Bell nonlocality and quantum contextuality offer profound insights into the foundations of quantum mechanics and drive the development of cutting-edge quantum technologies.
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