Quantum computation and cryptography: an overview
... Quantum Physics entails a way of processing information which is different from the traditional, classical, methods. The processing of the information carried by the wave function of a quantum physical system is the task of the new Quantum Information Theory (Schumacher 1995), a perfect marriage bet ...
... Quantum Physics entails a way of processing information which is different from the traditional, classical, methods. The processing of the information carried by the wave function of a quantum physical system is the task of the new Quantum Information Theory (Schumacher 1995), a perfect marriage bet ...
Low-Density Random Matrices for Secret Key Extraction
... between the transmitted content and all possible information known by an eavesdropper is at most !, i.e., the total amount of possible leaked information is upper bounded by ! bits. An important technique for secret key extraction is universal hashing [4], [7], which was introduced by Carter and Weg ...
... between the transmitted content and all possible information known by an eavesdropper is at most !, i.e., the total amount of possible leaked information is upper bounded by ! bits. An important technique for secret key extraction is universal hashing [4], [7], which was introduced by Carter and Weg ...
Wittgenstein`s Picture Theory of Language as a Key to Modern Physics
... physics. This may be unexpected, although we know that Tractatus was inspired by Wittgenstein’s study of the philosopher-physicists Heinrich Hertz and Ludwig Boltzmann. Wittgenstein often referred to Hertz and planned to study under Boltzmann, but was prevented from doing so by Boltzmann’s sudden su ...
... physics. This may be unexpected, although we know that Tractatus was inspired by Wittgenstein’s study of the philosopher-physicists Heinrich Hertz and Ludwig Boltzmann. Wittgenstein often referred to Hertz and planned to study under Boltzmann, but was prevented from doing so by Boltzmann’s sudden su ...
PSEUDO-FERMIONIC COHERENT STATES OMAR CHERBAL AND MAHREZ DRIR
... The coherent states which provide a quantum description of the evolution of a classical system [4] has been generalized to several quantum systems [9, 12]. In last years the concept of coherent states was also introduced to non-Hermitian quantum mechanics [1, 10]. In this perspective, we have constr ...
... The coherent states which provide a quantum description of the evolution of a classical system [4] has been generalized to several quantum systems [9, 12]. In last years the concept of coherent states was also introduced to non-Hermitian quantum mechanics [1, 10]. In this perspective, we have constr ...
After a 30-year struggle to harness quantum weirdness for
... so that it no longer represents many different states at once. If qubits are going to be useful in real-world calculations, they must be kept in the strictest isolation and manipulated with care — extremely difficult tasks. They also need to remain in their quantum states for much longer than it tak ...
... so that it no longer represents many different states at once. If qubits are going to be useful in real-world calculations, they must be kept in the strictest isolation and manipulated with care — extremely difficult tasks. They also need to remain in their quantum states for much longer than it tak ...
quantum mechanical model
... Orbital Energy: The amount of energy associated with an electron in a particular orbital. Quantum Number: A number describing a property of an electron. Principal (n): Describes the principal energy level of the electron. Aizmuthal (l): Describes the shape of the electron orbital (s: l=0, p: l=1, d: ...
... Orbital Energy: The amount of energy associated with an electron in a particular orbital. Quantum Number: A number describing a property of an electron. Principal (n): Describes the principal energy level of the electron. Aizmuthal (l): Describes the shape of the electron orbital (s: l=0, p: l=1, d: ...
Ontology of Quantum Space interpreted by Quantum Real Numbers.
... sense that there are numbers a ∈ RD such that a > 0 but there is no natural number n ∈ N such that n > a. RD is a complete metric space with respect to a distance function derived from the norm function | · | : RD − − > RD that takes a to max(a, −a) [8]. With this we can define a distance function ...
... sense that there are numbers a ∈ RD such that a > 0 but there is no natural number n ∈ N such that n > a. RD is a complete metric space with respect to a distance function derived from the norm function | · | : RD − − > RD that takes a to max(a, −a) [8]. With this we can define a distance function ...
Chapter 4 Section 2
... Energy level—region around nucleus where it is likely to be moving, similar to rungs on a ladder but not equally spaced Quantum—amount of energy needed to move an electron from its current energy level to the next higher one ...
... Energy level—region around nucleus where it is likely to be moving, similar to rungs on a ladder but not equally spaced Quantum—amount of energy needed to move an electron from its current energy level to the next higher one ...
Curriculum Vitae - Quantum Information Theory and Cryptography
... Presented at QIP 2013 as a contributed talk (approximately 20% acceptance rate). We study the class of quantum operations which can be implemented by distant parties that are restricted to local quantum operations and classical communication (LOCC). While LOCC emerges as the natural class of operati ...
... Presented at QIP 2013 as a contributed talk (approximately 20% acceptance rate). We study the class of quantum operations which can be implemented by distant parties that are restricted to local quantum operations and classical communication (LOCC). While LOCC emerges as the natural class of operati ...
Research Paper
... Quantum computing is the use of subatomic particles to carry information instead of a micro-circuit. The use of these particles allows for speed of light transmission, continuous bits and almost unbreakable computer security. By using infinitesimally small particles to carry data instead of electric ...
... Quantum computing is the use of subatomic particles to carry information instead of a micro-circuit. The use of these particles allows for speed of light transmission, continuous bits and almost unbreakable computer security. By using infinitesimally small particles to carry data instead of electric ...
Quantum key distribution
Quantum key distribution (QKD) uses quantum mechanics to guarantee secure communication. It enables two parties to produce a shared random secret key known only to them, which can then be used to encrypt and decrypt messages. It is often incorrectly called quantum cryptography, as it is the most well known example of the group of quantum cryptographic tasks.An important and unique property of quantum key distribution is the ability of the two communicating users to detect the presence of any third party trying to gain knowledge of the key. This results from a fundamental aspect of quantum mechanics: the process of measuring a quantum system in general disturbs the system. A third party trying to eavesdrop on the key must in some way measure it, thus introducing detectable anomalies. By using quantum superpositions or quantum entanglement and transmitting information in quantum states, a communication system can be implemented which detects eavesdropping. If the level of eavesdropping is below a certain threshold, a key can be produced that is guaranteed to be secure (i.e. the eavesdropper has no information about it), otherwise no secure key is possible and communication is aborted.The security of encryption that uses quantum key distribution relies on the foundations of quantum mechanics, in contrast to traditional public key cryptography which relies on the computational difficulty of certain mathematical functions, and cannot provide any indication of eavesdropping at any point in the communication process, or any mathematical proof as to the actual complexity of reversing the one-way functions used. QKD has provable security based on information theory, and forward secrecy.Quantum key distribution is only used to produce and distribute a key, not to transmit any message data. This key can then be used with any chosen encryption algorithm to encrypt (and decrypt) a message, which can then be transmitted over a standard communication channel. The algorithm most commonly associated with QKD is the one-time pad, as it is provably secure when used with a secret, random key. In real world situations, it is often also used with encryption using symmetric key algorithms like the Advanced Encryption Standard algorithm. In the case of QKD this comparison is based on the assumption of perfect single-photon sources and detectors, that cannot be easily implemented.