Quantized quasi-two-dimensional Bose-Einstein condensates with spatially modulated nonlinearity Deng-Shan Wang, Xing-Hua Hu,
... Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China ...
... Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China ...
Quantum Spin Doctors Dissect Exotic States of Matter
... While this example of superposition may seem both like particles and like waves. In the second, the atomic spins that are the source of the system’s mag- ridiculous at the scale of a cat in a box, it is key to the netic properties must at times be thought of as occu- Bose–Einstein condensate being s ...
... While this example of superposition may seem both like particles and like waves. In the second, the atomic spins that are the source of the system’s mag- ridiculous at the scale of a cat in a box, it is key to the netic properties must at times be thought of as occu- Bose–Einstein condensate being s ...
Giovannini, D., Romero, J., Leach, J., Dudley, A, Forbes, A, and
... these cases, which include the dimensions 2–5, the states fj‘ig can be chosen to be one of the MUBs. The states belonging to the remaining d MUBs are found to be superpositions of the basis pffiffiffi states with coefficients of equal magnitude jc‘ j ¼ 1= d but differing phases. In general, it is possible ...
... these cases, which include the dimensions 2–5, the states fj‘ig can be chosen to be one of the MUBs. The states belonging to the remaining d MUBs are found to be superpositions of the basis pffiffiffi states with coefficients of equal magnitude jc‘ j ¼ 1= d but differing phases. In general, it is possible ...
Paper
... It is well known that some creators of quantum mechanics (e.g. Nils Bohr) believed that quantum mechanics provides the complete (final) description of physical reality; that it would be impossible to create a deeper theory providing more detailed description of physical phenomena. This viewpoint was ...
... It is well known that some creators of quantum mechanics (e.g. Nils Bohr) believed that quantum mechanics provides the complete (final) description of physical reality; that it would be impossible to create a deeper theory providing more detailed description of physical phenomena. This viewpoint was ...
In the early 1930s, the relativistic electron
... usual interpretation of quantum theories, a submicroscopic observer – say Alice –, then the cat – our propagator – will reveal peculiar behaviours. The case is that the propagator does not vanish for a space-like separation. This means we would have an interaction between space-time points not conne ...
... usual interpretation of quantum theories, a submicroscopic observer – say Alice –, then the cat – our propagator – will reveal peculiar behaviours. The case is that the propagator does not vanish for a space-like separation. This means we would have an interaction between space-time points not conne ...
Optically dressed magnetic atoms
... 2S+1=6 spin states of the Mn atom (which are almost degenerate in the absence of the exciton), leading to a 6 line optical spectrum for the quantum dot (e.g. Fig.2, top left). We had already shown that laser excitation resonant with one of these optical transitions can be used to initialize a locali ...
... 2S+1=6 spin states of the Mn atom (which are almost degenerate in the absence of the exciton), leading to a 6 line optical spectrum for the quantum dot (e.g. Fig.2, top left). We had already shown that laser excitation resonant with one of these optical transitions can be used to initialize a locali ...
Chapter 1
... System B that is sufficiently isolated from the first. With their condition of completeness and the assumption of locality in hand, EPR argued that the position and momentum of a ...
... System B that is sufficiently isolated from the first. With their condition of completeness and the assumption of locality in hand, EPR argued that the position and momentum of a ...
Experiment - Physics@Technion
... R.M. Godun, M.B.d’Arcy, M.K. Oberthaler, G.S. Summy and K. Burnett, Phys. Rev. A 62, 013411 (2000), Phys. Rev. Lett. 83, 4447 (1999) Related experiments by M. Raizen and coworkers ...
... R.M. Godun, M.B.d’Arcy, M.K. Oberthaler, G.S. Summy and K. Burnett, Phys. Rev. A 62, 013411 (2000), Phys. Rev. Lett. 83, 4447 (1999) Related experiments by M. Raizen and coworkers ...
Solid-state quantum computing using spectral holes M. S. Shahriar, P. R. Hemmer,
... systems called quantum bits or qubits must be able to address and manipulate individual qubits, to effect coherent interactions between pairs of qubits, and to read out the value of qubits 关1,2兴. Current methods for addressing qubits are divided into spatial methods, as when a laser beam is focused ...
... systems called quantum bits or qubits must be able to address and manipulate individual qubits, to effect coherent interactions between pairs of qubits, and to read out the value of qubits 关1,2兴. Current methods for addressing qubits are divided into spatial methods, as when a laser beam is focused ...
Chaotic Scattering of Microwaves in Billiards: Induced Time
... The Quantum Billiard and its Simulation ...
... The Quantum Billiard and its Simulation ...
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.