Deterministic secure direct communication using GHZ states and
... a shared secret key to encrypt them and the message is deterministically sent through the quantum channel, but can be read only after a transmission of an additional classical information for each qubit. Boström and Felbinger [26] put forward a communication scheme, the ”ping-pong protocol”, which ...
... a shared secret key to encrypt them and the message is deterministically sent through the quantum channel, but can be read only after a transmission of an additional classical information for each qubit. Boström and Felbinger [26] put forward a communication scheme, the ”ping-pong protocol”, which ...
Gregor Wentzel - National Academy of Sciences
... after the war. Considerable progress in the area took place in the 1950s, especially in understanding superfluidity and superconductivity from first principles. So it was natural for Wentzel to get involved. He published several papers (1951, 1957, 1963) during this decade, although they are not amo ...
... after the war. Considerable progress in the area took place in the 1950s, especially in understanding superfluidity and superconductivity from first principles. So it was natural for Wentzel to get involved. He published several papers (1951, 1957, 1963) during this decade, although they are not amo ...
atom interferometer - Center for Ultracold Atoms
... “differentially detuned separated oscillatory fields” or DSOF), we have generalized Ramsey's separated oscillatory field method and have demonstrated an interferometer capable of manipulating longitudinal momentum coherences. We used this to determine the complete description of the quantum state o ...
... “differentially detuned separated oscillatory fields” or DSOF), we have generalized Ramsey's separated oscillatory field method and have demonstrated an interferometer capable of manipulating longitudinal momentum coherences. We used this to determine the complete description of the quantum state o ...
Loop Quantum Gravity and Its Consistency
... Many of the advances in physics since the early 20th century have been propelled by two theories: General Relativity and Quantum Mechanics. From their inception, both these branches of physics revolutionised scientific thinking and brought about radical (at that time) new moves away from classical p ...
... Many of the advances in physics since the early 20th century have been propelled by two theories: General Relativity and Quantum Mechanics. From their inception, both these branches of physics revolutionised scientific thinking and brought about radical (at that time) new moves away from classical p ...
Dealing with ignorance: universal discrimination, learning and quantum correlations Gael Sentís Herrera
... Discriminating the state of a quantum system among a number of options is one of the most fundamental operations in quantum information theory. A primal feature of quantum theory is that, when two possible quantum states are nonorthogonal, no conceivable measurement of the system can determine its s ...
... Discriminating the state of a quantum system among a number of options is one of the most fundamental operations in quantum information theory. A primal feature of quantum theory is that, when two possible quantum states are nonorthogonal, no conceivable measurement of the system can determine its s ...
Complexity Science, Living Systems, and Reflexing Interfaces:
... In any case, all phenomena occurring within the brain, both at macroscopic or microscopic level, can be related to some form of phase transition and a number of authors (Pessa, 2007, Alfinito, Viglione, & Vitiello, 2001) pointed out the inconsistence of a quantum mechanical framework based only on t ...
... In any case, all phenomena occurring within the brain, both at macroscopic or microscopic level, can be related to some form of phase transition and a number of authors (Pessa, 2007, Alfinito, Viglione, & Vitiello, 2001) pointed out the inconsistence of a quantum mechanical framework based only on t ...
Multimode quantum memory based on atomic frequency combs
... tial mode defined by the direction of propagation of the input field兲, ␦ j the detuning of the atom with respect to the laser frequency, and the amplitudes c j depend on the frequency and on the spatial position of the particular atom j. The collective state can be understood as a coherent excitatio ...
... tial mode defined by the direction of propagation of the input field兲, ␦ j the detuning of the atom with respect to the laser frequency, and the amplitudes c j depend on the frequency and on the spatial position of the particular atom j. The collective state can be understood as a coherent excitatio ...
The Time Dependent Schrödinger Equation
... 2. You should know that the wavefunction for systems where the potential energy is independent of time [V(x,t) V(x)] is given by ...
... 2. You should know that the wavefunction for systems where the potential energy is independent of time [V(x,t) V(x)] is given by ...
ןב תטיסרבינוא - בגנב ןוירוג
... 2.3 Pure and mixed states, coherence, density matrix, Bloch sphere and Bloch vector The periodic probability oscillations described in the previous section can never be observed by one measurement of a single two-state atom. To notice these oscillations we need an ensemble of such atoms (and several ...
... 2.3 Pure and mixed states, coherence, density matrix, Bloch sphere and Bloch vector The periodic probability oscillations described in the previous section can never be observed by one measurement of a single two-state atom. To notice these oscillations we need an ensemble of such atoms (and several ...
Quantum Computation and Quantum Information
... Quantum mechanics depicts phenomena at microscopic level such as position and momentum of an individual particle like an atom or electron, spin of an electron, detection of light photons, and the emission and absorption of light by atoms. Unlike classical mechanics where physical entities like posit ...
... Quantum mechanics depicts phenomena at microscopic level such as position and momentum of an individual particle like an atom or electron, spin of an electron, detection of light photons, and the emission and absorption of light by atoms. Unlike classical mechanics where physical entities like posit ...
Monday, Mar. 28, 2005
... • This QN is found to be conserved in strong interactions • But not conserved in EM or Weak interactions • Third component of isospin QN is assigned to be positive for the particles with larger electric charge • Isospin is not a space-time symmetry • Cannot be assigned uniquely to leptons and photon ...
... • This QN is found to be conserved in strong interactions • But not conserved in EM or Weak interactions • Third component of isospin QN is assigned to be positive for the particles with larger electric charge • Isospin is not a space-time symmetry • Cannot be assigned uniquely to leptons and photon ...
Resource cost results for one-way entanglement
... who determined the capacity for transmission of classical messages over an arbitrarily varying channel with classical input and quantum output. A treatment of arbitrarily varying quantum channels was done by Ahlswede, Bjelaković, the first author, and Nötzel published in 2013.4 There, they determi ...
... who determined the capacity for transmission of classical messages over an arbitrarily varying channel with classical input and quantum output. A treatment of arbitrarily varying quantum channels was done by Ahlswede, Bjelaković, the first author, and Nötzel published in 2013.4 There, they determi ...
achieving 128-bit security against quantum attacks in openvpn
... these problems can be solved in polynomial time on a quantum computer, using Shor’s algorithm [2]. Almost all asymmetric cryptography in use today can be efficiently broken by quantum algorithms. Symmetric cryptography, on the other hand, seems to be able to survive quantum computer attacks. The bes ...
... these problems can be solved in polynomial time on a quantum computer, using Shor’s algorithm [2]. Almost all asymmetric cryptography in use today can be efficiently broken by quantum algorithms. Symmetric cryptography, on the other hand, seems to be able to survive quantum computer attacks. The bes ...
achieving 128-bit security against quantum attacks in openvpn
... these problems can be solved in polynomial time on a quantum computer, using Shor’s algorithm [2]. Almost all asymmetric cryptography in use today can be efficiently broken by quantum algorithms. Symmetric cryptography, on the other hand, seems to be able to survive quantum computer attacks. The bes ...
... these problems can be solved in polynomial time on a quantum computer, using Shor’s algorithm [2]. Almost all asymmetric cryptography in use today can be efficiently broken by quantum algorithms. Symmetric cryptography, on the other hand, seems to be able to survive quantum computer attacks. The bes ...
Document
... creation of simulation tools that can quantitatively explain or even predict experiments. In particular it would be very desirable to explore the design space before or in conjunction with the (typically time consuming and expensive) experiments. A general tool that is applicable over a large set of ...
... creation of simulation tools that can quantitatively explain or even predict experiments. In particular it would be very desirable to explore the design space before or in conjunction with the (typically time consuming and expensive) experiments. A general tool that is applicable over a large set of ...
Quantum States of Neutrons in the Gravitational Field
... reflecting glass surface under the effect of gravity. Within the framework of quantum mechanics this distribution is equivalent to the absolute square of the neutron’s wavefunction in position space. In a detailed theoretical analysis, we show that the measurement is in good agreement with the quant ...
... reflecting glass surface under the effect of gravity. Within the framework of quantum mechanics this distribution is equivalent to the absolute square of the neutron’s wavefunction in position space. In a detailed theoretical analysis, we show that the measurement is in good agreement with the quant ...
Quantum networks in the presence of D B
... tuned by external gate voltages. This has been demonstrated experimentally by measuring Shubnikov–de Haas oscillations in two-dimensional electron gas (2DEG) [17–19]. In the recent letter [20], we have shown that it is possible to obtain a localization of the electron wave function by means of the R ...
... tuned by external gate voltages. This has been demonstrated experimentally by measuring Shubnikov–de Haas oscillations in two-dimensional electron gas (2DEG) [17–19]. In the recent letter [20], we have shown that it is possible to obtain a localization of the electron wave function by means of the R ...
Quantum Heat Engines and Refrigerators: Continuous Devices
... of hypothetical quantum heat engines and refrigerators to address these issues. Once understood, these models serve as a template for real devices. Gedanken heat engines are an integral part of thermodynamical theory. In 1824, Carnot (1) set the stage by analyzing an ideal engine. His analysis prece ...
... of hypothetical quantum heat engines and refrigerators to address these issues. Once understood, these models serve as a template for real devices. Gedanken heat engines are an integral part of thermodynamical theory. In 1824, Carnot (1) set the stage by analyzing an ideal engine. His analysis prece ...
Abstract PACS: 03.67.Bg, 04.80.Nn, 42.50.Pq, 37.10.Vz Email
... Schrödinger[2] is one of the strangest phenomena in quantum mechanics. Bohm specifies EPR thoughts in ref[1] and presents a vivid sample of state entanglement, i.e. the entanglement of two electrons spin states[3]. Bell accepts EPR conclusion and proposes Bell inequalities to give a judgment which t ...
... Schrödinger[2] is one of the strangest phenomena in quantum mechanics. Bohm specifies EPR thoughts in ref[1] and presents a vivid sample of state entanglement, i.e. the entanglement of two electrons spin states[3]. Bell accepts EPR conclusion and proposes Bell inequalities to give a judgment which t ...
Quantum Error Correction (QEC) - ETH E
... 1.2.2. Universal quantum gates In classical computers all logic can be build up from a small set of so called universal gates or even from one single (e.g. NAND). This is not surprising, as the truth table of a classical gate has finite combinations of outputs. This is very important for hardware c ...
... 1.2.2. Universal quantum gates In classical computers all logic can be build up from a small set of so called universal gates or even from one single (e.g. NAND). This is not surprising, as the truth table of a classical gate has finite combinations of outputs. This is very important for hardware c ...