Quantum cryptography
... Summary of QKD • Quantum cryptography is really a method to reliably send a quantum key that is subsequently used with the “one time pad” Vernam cipher • Many “protocols” have been developed for QKD each of which use nonorthogonal basis sets – E.g. BB84 which uses (H,V) and (+45,-45) polarization s ...
... Summary of QKD • Quantum cryptography is really a method to reliably send a quantum key that is subsequently used with the “one time pad” Vernam cipher • Many “protocols” have been developed for QKD each of which use nonorthogonal basis sets – E.g. BB84 which uses (H,V) and (+45,-45) polarization s ...
Quantum weakest preconditions
... A second goal is to present a semantical paradigm for quantum computation. Quantum programming languages have started to appear. Perhaps the best known is one due to Selinger [Sel03] which is based on the slogan: “Quantum data and classical control.” While this is not the final word on the subject, ...
... A second goal is to present a semantical paradigm for quantum computation. Quantum programming languages have started to appear. Perhaps the best known is one due to Selinger [Sel03] which is based on the slogan: “Quantum data and classical control.” While this is not the final word on the subject, ...
JQI Fellows - University of Maryland, College Park
... calculation are complete. Of course you will need to do some work beforehand to figure out what H' corresponds to what mathematical or logical operation. The system is left in a well-defined state ... but it is typically a superposition of classical (0&1) states. The state of each qubit is then meas ...
... calculation are complete. Of course you will need to do some work beforehand to figure out what H' corresponds to what mathematical or logical operation. The system is left in a well-defined state ... but it is typically a superposition of classical (0&1) states. The state of each qubit is then meas ...
A reasonable thing that just might work Abstract Daniel Rohrlich
... B 0 . Hence all we need is that when Bob detects a correlation, it is more likely that Alice measured a than when he detects an anti-correlation. If it were not more likely, it would mean that Bob’s measurements yield zero information about B or about B 0 , contradicting the fact that there is a cla ...
... B 0 . Hence all we need is that when Bob detects a correlation, it is more likely that Alice measured a than when he detects an anti-correlation. If it were not more likely, it would mean that Bob’s measurements yield zero information about B or about B 0 , contradicting the fact that there is a cla ...
on bose-einstein condensation in any dimension1
... Jo Jo x + /i where x 0 — po/MT, pQ being some characteristic momentum p 0 3> Pr- Thus, /; does not ...
... Jo Jo x + /i where x 0 — po/MT, pQ being some characteristic momentum p 0 3> Pr- Thus, /; does not ...
Temporal Coherence of Photons Emitted by Single Nitrogen
... generation of nonclassical states has attracted widespread attention because of their application in quantum physics and quantum information science. Solid state systems are often considered to be promising and also difficult because of inhomogeneities and fast dephasing. Spins in solids, for exampl ...
... generation of nonclassical states has attracted widespread attention because of their application in quantum physics and quantum information science. Solid state systems are often considered to be promising and also difficult because of inhomogeneities and fast dephasing. Spins in solids, for exampl ...
12 Quantum Electrodynamics
... In this chapter we want to couple electrons and photons with each other by an appropriate interaction and study the resulting interacting field theory, the famous quantum electrodynamics (QED). Since the coupling should not change the two physical degrees of freedom described by the four-component p ...
... In this chapter we want to couple electrons and photons with each other by an appropriate interaction and study the resulting interacting field theory, the famous quantum electrodynamics (QED). Since the coupling should not change the two physical degrees of freedom described by the four-component p ...
Quantum dynamics of open systems governed by the Milburn equation
... 52 21/2( u e & 1 u g & ). From Fig. 1 we see that for large values of g ~i.e., a very small fundamental time step! the atom exhibits the usual vacuum Rabi oscillations as predicted by the standard Schrödinger equation. Nevertheless, with the decrease of g not only the intrinsic decoherence of the i ...
... 52 21/2( u e & 1 u g & ). From Fig. 1 we see that for large values of g ~i.e., a very small fundamental time step! the atom exhibits the usual vacuum Rabi oscillations as predicted by the standard Schrödinger equation. Nevertheless, with the decrease of g not only the intrinsic decoherence of the i ...
Quantum NP - A Survey Dorit Aharonov and Tomer Naveh
... to cheat by entangling the witnesses he provides. We will have to show that such a strategy cannot help the prover in case x is not in the language. We construct a new verifier which runs in parallel polynomially many copies of the verifier V , then outputs the majority. The existence of a witness ...
... to cheat by entangling the witnesses he provides. We will have to show that such a strategy cannot help the prover in case x is not in the language. We construct a new verifier which runs in parallel polynomially many copies of the verifier V , then outputs the majority. The existence of a witness ...
Quantum Connections
... and waves, that an object can be in many places at once and that two particles can maintain an eerie instantaneous connection even when separated by vast distances—quantum machines could make previously unthinkable computing, communication and measurement tasks trivial. To cite just one example, a q ...
... and waves, that an object can be in many places at once and that two particles can maintain an eerie instantaneous connection even when separated by vast distances—quantum machines could make previously unthinkable computing, communication and measurement tasks trivial. To cite just one example, a q ...
Unified and Generalized Approach to Quantum Error Correction David Kribs, Raymond Laflamme,
... Remark 1 The condition Eq. (9) is independent of the choice of basis fji ig that defines the family Pkl and of the operator-sum representation of E. In particular, under the P P changes j0k i l ukl jl iPand Fa b wab Eb , the scalars change to 0abkl a0 b0 k0 l0 ukk0 ul0 l waa0 wbb0 abkl ...
... Remark 1 The condition Eq. (9) is independent of the choice of basis fji ig that defines the family Pkl and of the operator-sum representation of E. In particular, under the P P changes j0k i l ukl jl iPand Fa b wab Eb , the scalars change to 0abkl a0 b0 k0 l0 ukk0 ul0 l waa0 wbb0 abkl ...
Classification of completely positive maps
... Without going into the full details of the remarkable range of quantum phenomena, to say the least the world of quantum mechanics is very strange and different from the “classical” world in which we live most directly. Famous and confirmed phenomena include particles tunneling through walls, telepor ...
... Without going into the full details of the remarkable range of quantum phenomena, to say the least the world of quantum mechanics is very strange and different from the “classical” world in which we live most directly. Famous and confirmed phenomena include particles tunneling through walls, telepor ...
Is Quantum Indeterminism Relevant to Free Will?
... unpredictable. To put the matter in more general terms: Either one takes the quantum probabilities to be the complete probabilities, and then one runs into the randomness objection. Or one goes for interactionism and assumes a regular influence of intentions, and then one is committed to the consequ ...
... unpredictable. To put the matter in more general terms: Either one takes the quantum probabilities to be the complete probabilities, and then one runs into the randomness objection. Or one goes for interactionism and assumes a regular influence of intentions, and then one is committed to the consequ ...
D.5 Quantum error correction - UTK-EECS
... On classical computers, bits are represented by very large numbers of particles (but that is changing). On quantum computers, qubits are represented by atomic-scale states or objects (photons, nuclear spins, electrons, trapped ions, etc.). They are very likely to become entangled with computationall ...
... On classical computers, bits are represented by very large numbers of particles (but that is changing). On quantum computers, qubits are represented by atomic-scale states or objects (photons, nuclear spins, electrons, trapped ions, etc.). They are very likely to become entangled with computationall ...
Quantum factorization of 56153 with only 4 qubits
... et al. [1] in 2012 factored an entire class of numbers, and not just the one number that they reported (which was 143). The largest such number that we found without using any prior knowledge of the solution to the factorization problem was 56153. Since the experiment in [1] only involved 4 qubits, ...
... et al. [1] in 2012 factored an entire class of numbers, and not just the one number that they reported (which was 143). The largest such number that we found without using any prior knowledge of the solution to the factorization problem was 56153. Since the experiment in [1] only involved 4 qubits, ...
TWO-STATE SYSTEMS
... It is interesting to notice what has happened to the concept of “physical dimension.” We recognize a physical parameter t with the dimensionality of “time,” which we read from the “clock on the wall,” not from the printed output of a “meter” as here construed: time we are prepared to place in a clas ...
... It is interesting to notice what has happened to the concept of “physical dimension.” We recognize a physical parameter t with the dimensionality of “time,” which we read from the “clock on the wall,” not from the printed output of a “meter” as here construed: time we are prepared to place in a clas ...
Bose-Einstein Condensation in a gas
... The first theoretical description of Bose-Einstein condensation (BEC) in an ideal gas dates from 1924, when Einstein published his articles on the Quantum theory of an ideal gas. This theory was extended to describe the interacting Bose gas in 1947 by Bogoliubov, who introduced a mean field theory t ...
... The first theoretical description of Bose-Einstein condensation (BEC) in an ideal gas dates from 1924, when Einstein published his articles on the Quantum theory of an ideal gas. This theory was extended to describe the interacting Bose gas in 1947 by Bogoliubov, who introduced a mean field theory t ...
