Black-Box Superconducting Circuit Quantization
... with uncontrolled (environmental) degrees of freedom must be minimized. In circuit quantum electrodynamics (cQED) [2,11,13], this is achieved by coupling the JJs to a common microwave environment with a desired discrete mode structure. So far such systems have mostly been described theoretically by ...
... with uncontrolled (environmental) degrees of freedom must be minimized. In circuit quantum electrodynamics (cQED) [2,11,13], this is achieved by coupling the JJs to a common microwave environment with a desired discrete mode structure. So far such systems have mostly been described theoretically by ...
Quantum Manipulation of Two-Electron Spin States in
... system with a two-pulse procedure: one microsecond pulse that is varied over the dashed green rectangular region depicted in Fig. 2(b) and a fast fixed negative pulse to the gate L of 50 ns duration and of amplitude V ns equal to 80 mV; finally, we proceed to the spin measurement in bringing the sys ...
... system with a two-pulse procedure: one microsecond pulse that is varied over the dashed green rectangular region depicted in Fig. 2(b) and a fast fixed negative pulse to the gate L of 50 ns duration and of amplitude V ns equal to 80 mV; finally, we proceed to the spin measurement in bringing the sys ...
Using Digital Signature with DNS
... New record types • The KEY record: The public key used • The SIG record: The signatures created by that key • The NXT record: For denial of existance • The DS record: For building the chain of trust ...
... New record types • The KEY record: The public key used • The SIG record: The signatures created by that key • The NXT record: For denial of existance • The DS record: For building the chain of trust ...
Measurement and assignment of the size-dependent
... presence of the unresolved states, modeled by the cubic background. In addition, since PLE represents a combination of absorption and emission behavior, a detailed knowledge of the emission quantum yield for each transition would be required to quantify the absorption strength of the states observed ...
... presence of the unresolved states, modeled by the cubic background. In addition, since PLE represents a combination of absorption and emission behavior, a detailed knowledge of the emission quantum yield for each transition would be required to quantify the absorption strength of the states observed ...
Multiphoton population transfer between rovibrational states of HF: adiabatic
... the driving pulse, the field strength becomes small enough so that the stable surfaces again form the separatrix and the initial final stable surfaces, which trap the trajectories that were mixed into the chaotic sea. By chirping the microwave frequency a small amount, most of the trajectories can b ...
... the driving pulse, the field strength becomes small enough so that the stable surfaces again form the separatrix and the initial final stable surfaces, which trap the trajectories that were mixed into the chaotic sea. By chirping the microwave frequency a small amount, most of the trajectories can b ...
Investigating incompatibility: How to reconcile complementarity with EPR C
... Complementarity can be reconciled with EPR. It is Duality which is irreconcilable with EPR, but then again Duality, which has no use of the quantum, is now proved inconsistent with Complementarity, which demands the quantum. And if Duality, which does conflict with EPR, provides a mismatch with CTY, ...
... Complementarity can be reconciled with EPR. It is Duality which is irreconcilable with EPR, but then again Duality, which has no use of the quantum, is now proved inconsistent with Complementarity, which demands the quantum. And if Duality, which does conflict with EPR, provides a mismatch with CTY, ...
Slides - Agenda
... The total current measured at the ammeter is equal to that computed at the DUT ...
... The total current measured at the ammeter is equal to that computed at the DUT ...
Can Bohmian mechanics be made relativistic?
... configuration space of the N particles. (For particles with spin, one need only consider Ψt as instead being the appropriate N-particle spinor, obeying instead of equation (1.1) the appropriate wave equation, and then interpret the numerator and denominator of the right-hand side of equation (1.2) a ...
... configuration space of the N particles. (For particles with spin, one need only consider Ψt as instead being the appropriate N-particle spinor, obeying instead of equation (1.1) the appropriate wave equation, and then interpret the numerator and denominator of the right-hand side of equation (1.2) a ...
New Class of Quantum Error-Correcting Codes for a Bosonic Mode
... coherent states. To create more useful quantum superpositions of photon Fock states which can store quantum information, it is necessary to couple the bosonic mode to a nonlinear element, e.g., a superconducting qubit [41,42], a trapped ion [45–48], or a Rydberg atom [32,33]. Experiments have demons ...
... coherent states. To create more useful quantum superpositions of photon Fock states which can store quantum information, it is necessary to couple the bosonic mode to a nonlinear element, e.g., a superconducting qubit [41,42], a trapped ion [45–48], or a Rydberg atom [32,33]. Experiments have demons ...
THE PHYSICAL WORLD AS A VIRTUAL REALITY: PART II, TIME
... We save, download and upload static data but dynamic processing doesn’t work that way. To understand this, recall that Einstein derived relativity by imagining he was surfing a light wave “frozen” in space and time, but then concluded that this was impossible, and changed his ideas of space and time ...
... We save, download and upload static data but dynamic processing doesn’t work that way. To understand this, recall that Einstein derived relativity by imagining he was surfing a light wave “frozen” in space and time, but then concluded that this was impossible, and changed his ideas of space and time ...
A universal alphabet and rewrite system
... this to remain a rewrite system an initial state (that can be re-written) must exist, and for it to be universal there must be, we conjecture, a minimum of two rewrite rules (productions). One of these, create, delivers a new symbol at each invocation. We use the term symbol here because what is del ...
... this to remain a rewrite system an initial state (that can be re-written) must exist, and for it to be universal there must be, we conjecture, a minimum of two rewrite rules (productions). One of these, create, delivers a new symbol at each invocation. We use the term symbol here because what is del ...
Fully quantum-mechanical model of a SQUID ring coupled to an
... the 共flux-dependent兲 eigenstates of H s⬘ . Again in our numerical work we use a truncated basis with ⫽0, . . . ,⌺, where ⌺ is taken to be much greater than the average energy level in which the SQUID operates. The first few eigenvalues ( ⫽0, . . . ,4) of H s⬘ as functions of ⌽ x /⌽ 0 (⫽ x ) ar ...
... the 共flux-dependent兲 eigenstates of H s⬘ . Again in our numerical work we use a truncated basis with ⫽0, . . . ,⌺, where ⌺ is taken to be much greater than the average energy level in which the SQUID operates. The first few eigenvalues ( ⫽0, . . . ,4) of H s⬘ as functions of ⌽ x /⌽ 0 (⫽ x ) ar ...
Quantum-classical correspondence in the hydrogen atom in weak
... expectation values of the angular momentum and the RungeLenz vector obey exactly the same equations as the timeaveraged classical variables. We also investigate the conditions on the fields for which the perturbative approach holds, and we find that classical mechanics seems to require more relaxed ...
... expectation values of the angular momentum and the RungeLenz vector obey exactly the same equations as the timeaveraged classical variables. We also investigate the conditions on the fields for which the perturbative approach holds, and we find that classical mechanics seems to require more relaxed ...
Physlets and Open Source Physics for Quantum Mechanics:
... supposed to imagine the motion of the packet by reading the images from left to right. We notice that as the packet moves to the right its leading edge encounters the infinite wall first and reflects to the left back towards the middle of the well. There are several interesting features about this p ...
... supposed to imagine the motion of the packet by reading the images from left to right. We notice that as the packet moves to the right its leading edge encounters the infinite wall first and reflects to the left back towards the middle of the well. There are several interesting features about this p ...
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.