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When is an area law not an area law?
When is an area law not an area law?

Quantum computers
Quantum computers

... is often written in a bit different manner ...
Superconducting Circuits and Quantum Computation—T. P. Orlando
Superconducting Circuits and Quantum Computation—T. P. Orlando

... Chapter 20. Superconducting Circuits and Quantum Computation Figure 1a shows a SEM image of the persistent current qubit (inner loop) and the measuring dc SQUID (outer) loop. A schematic of the qubit and the measuring circuit is shown in Figure 1b, where the Josephson junctions are denoted by x's. ...
Probabilistic instantaneous quantum computation
Probabilistic instantaneous quantum computation

... qubits 1 and 2. In (1/4) n cases the whole state of qubits 3 is projected onto the state resulting from the correct input and she does not have to perform any additional transformation on qubits 3. In the remaining 1⫺(1/4) n cases, the result of the engineer’s Bell-state analysis will not be the rig ...
Entanglement in bipartite and tripartite quantum systems
Entanglement in bipartite and tripartite quantum systems

Multi-particle qubits - Department of Physics — ETH Zurich
Multi-particle qubits - Department of Physics — ETH Zurich

quantum - Word Format
quantum - Word Format

Thermodynamics of Horizons from a Dual Quantum System
Thermodynamics of Horizons from a Dual Quantum System

Thermodynamic anomalies in open quantum systems: Strong
Thermodynamic anomalies in open quantum systems: Strong

Interaction- and measurement-free quantum Zeno gates for universal computation
Interaction- and measurement-free quantum Zeno gates for universal computation

Power of one qumode for quantum computation Please share
Power of one qumode for quantum computation Please share

Quantum Turing Test
Quantum Turing Test

... protocol by which Alice interacts quantumly {|+⇥ ⇧}with Bob in order to obtain the result of a utation, U (x), where X = (Ũ , x) is Alice’s input with Ũ being a description of U . ...
Information Flow in Entangled Quantum Systems
Information Flow in Entangled Quantum Systems

IS THERE A UNIQUE PHYSICAL ENTROPY? MICRO VERSUS
IS THERE A UNIQUE PHYSICAL ENTROPY? MICRO VERSUS

Spin-based quantum computers made by chemistry: hows and whys†
Spin-based quantum computers made by chemistry: hows and whys†

... computing these operations are called ‘‘unitaries’’. A ‘‘quantum computation’’ is then a sequence of unitary transformations Q U^ N ¼ k u^k performed on some initial state |Jfi, to produce the final state |Jfi. The initial state is then the input to the computer, and the final state the output. Thes ...
Qubits and quantum computers
Qubits and quantum computers

... interactions are limited to very few particles (qubits) and (on the geometric side) that those involved particles are confined geometrically. Enforcing local rules on the nature of noise (approximations) allows highly non-local behavior for controlled systems via quantum faulttolerance. I predict th ...
JQI Fellows - University of Maryland, College Park
JQI Fellows - University of Maryland, College Park

Full text in PDF form
Full text in PDF form

Superconducting Circuits and Quantum Computation
Superconducting Circuits and Quantum Computation

Occam`s Quantum Strop: Synchronizing and
Occam`s Quantum Strop: Synchronizing and

Cavity QED
Cavity QED

Full text in PDF form
Full text in PDF form

Statistical Entropy of Radiation: Different Approaches
Statistical Entropy of Radiation: Different Approaches

Analysis of a Quantum Error Correcting Code using Quantum
Analysis of a Quantum Error Correcting Code using Quantum

... Our model of a quantum error correction system consists of three processes: Alice, Bob and Noise. Alice wants to send a qubit to Bob over a noisy channel, represented by Noise. She uses a simple error correcting code based on threefold repetition [13, Chapter 10]. This code is able to correct a sing ...
Generalized Second Law in String Cosmology
Generalized Second Law in String Cosmology

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Algorithmic cooling

Algorithmic cooling is a phenomenon in quantum computation in which the processing of certain types of computation results in negative entropy and thus a cooling effect.The phenomenon is a result of the connection between thermodynamics and information theory. In so far as information is encoded in physical systems it is subject to the laws of thermodynamics.Certain processes within computation require a change in entropy within the computing system. As data must be stored as some kind of ordered structure (like a localized charge in a capacitor) so the erasure of data by destroying this order must involve an increase in disorder, or entropy. This means that the erasure of data releases heat. This is Landauer's principle.Reversible computing or Adiabatic computing is a theoretical type of computing in which data is never erased, it just changes state or is marked to be ignored. In theory such a system would be able to ""hide"" data without releasing heat.In the case of quantum entangled data, or qubits, it is possible for a computation to result in negative entropy, actually transferring heat out of the computational system, and so cooling it.
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